Handheld electronic harp and implementation method

Abstract

The present application relates to a kind of handheld electronic banjo and implementation method, including: handheld banjo, left hand piano, right hand piano, circuit board, tone key button, function key button, multi-position switch, indicating lamp, sound sensor, intensity sensor, voice recognition module, motion detection module, microprocessor module, bluetooth module, power module, musical instrument module, musical instrument chip, musical instrument power amplifier, hand belt, speaker, charging port and display screen, microprocessor module detects tone key button and function key button signal, and intensity signal and motion data, control musical instrument module generates musical sound signal to power amplifier drive speaker and emit musical sound.It has a variety of tone and accompaniment, while playing melody, accompaniment, body movement accompaniment and singing, self-defined function setting, provide more flexible and diversified use mode, split structure handheld banjo, key button quantity is less, and tonal range is wider, small in size, easy to carry, fingering is simple, significantly reduce the difficulty of learning musical instrument.

Description

Technical Field

[0001] This invention relates to the field of electronic bayanx musical instrument technology, and in particular to a handheld electronic bayanx and its implementation method. Background Technology

[0002] Electronic musical instruments are now very popular, and there is an increasing number of electronic instruments that imitate the structure and playing methods of traditional instruments, including the electronic bayan. However, existing electronic bayan have shortcomings such as high operating difficulty and large size, making it difficult for ordinary people to learn electronic instruments and requiring a lot of effort. Many people who like musical instruments find it difficult to enjoy the fun of playing them.

[0003] Among them, the prior art 202121565491.6 discloses a patent for "an electronic accordion", which includes a keyboard and a bass machine. The keyboard and bass machine are connected as one unit through a sealed bellows. The main control circuit, the wind pressure sensor located in the bellows, the sound source circuit and the volume adjustment circuit are connected. The volume adjustment circuit is connected to the speaker through the power amplifier circuit. The structure still maintains the structure and playing method of the traditional accordion.

[0004] In view of the shortcomings of the existing electronic bayan, the inventor, through continuous research, design, and repeated trials and improvements, has finally created this invention with practical value. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing electronic musical instruments, such as long training cycles, high playing difficulty, and lack of flexibility, and to provide an innovative handheld electronic bayan with a split structure. This instrument has the advantages of short training cycles, ease of playing, small size, and portability. It adopts a professional electronic musical instrument chip, has hundreds of instrument timbres and various percussion accompaniments, and fully utilizes the function of modern electronic musical instrument chips, allowing more people who like both traditional and electronic bayan to realize their desire to enjoy playing the new electronic bayan. Another purpose is to open up the internal functions of the handheld electronic bayan by using a method of customizing the function mapping table to achieve personalized settings for note name buttons, function buttons, function keys, and voice commands, making it more personalized and diversified, and thus more suitable for practical use.

[0006] This invention transforms the strap-on electronic bayan into a handheld instrument, making it compact and easy to carry, significantly simplifying the structure of existing electronic bayan. Both the left and right hands are equipped with motion detection modules, allowing for the simulation of percussion instrument movements and accompaniment during performance, such as mimicking the movement trajectory and characteristics of a maracas. The hands move freely and unrestricted during performance, allowing for separate playing and movement, and enabling full expression of emotion, thus broadening its application range. A hand strap fixing device is installed on the side of the casing, facilitating flexible and convenient operation and enhancing performance skills, making it suitable for formal performance occasions.

[0007] Compared with existing technologies, this invention has significant advantages and beneficial effects: By innovatively deconstructing the traditional one-piece electronic bayan into two independent structures, it successfully transforms the originally one-piece electronic bayan into a split structure, offering a wider variety of timbres and accompaniments, and enabling simultaneous performance of melodies, accompaniments, body movements, and vocals; by employing unique methods of reducing the number of buttons and shrinking the size of the instrument, the range of finger movement during performance is significantly reduced, making fingering simpler and easier to learn. The electronic bayan is meticulously designed as a handheld electronic bayan with an easily operable split structure consisting of a left-hand and a right-hand instrument, providing users with a more flexible, richer, and more diverse way of using it and a superior experience, significantly enhancing the electronic bayan's performance. The appeal of the dulcimer gives it a competitive edge in the market. For example, in traditional or electronic dulcimer performances, the limitations of the integrated structure make it difficult for performers to showcase their skills in certain situations. However, the split-type handheld electronic dulcimer designed in this invention allows performers to play easily while on the go, breaking the limitations of the venue. Furthermore, reducing the number of buttons and shrinking the size of the instrument not only lowers production costs but also makes the handheld electronic dulcimer easier to carry and operate, expanding its application range in different occasions. In addition to performances in formal settings, it is also suitable for impromptu performances, small gatherings, and travel. These innovations make the electronic dulcimer of this invention unique in the market, possessing extremely high novelty and competitive value.

[0008] It boasts at least the following advantages: simple fingering, easy to learn and master, reducing the difficulty of learning and playing, suitable for all ages, and perfect for expressing emotions; compact size, easy to carry, suitable for travel; available in high, medium, and low grades, suitable for children's learning in addition to formal occasions and family entertainment; for children, it promotes left and right hand coordination, beneficial for both hemispheres of the brain; adults can enjoy music and dance together, transforming a traditional instrument into a fun sport; it benefits brain training for the elderly and can also be used for fun rehabilitation training for patients; it brings a new experience to bayan enthusiasts, with various exercise modes available. This invention mimics the playing methods and movements of traditional musical instruments, producing the sounds of various percussion instruments. Its internal functions are open to external users, allowing for customization of note name buttons, function buttons, and voice commands. This provides greater personalization and creative freedom, offering a more flexible and diverse user experience, further enhancing the appeal and market competitiveness of the electronic bayan. The invention features a simple structure, easy assembly, good consistency, and ease of batch debugging, production, and quality control. It requires minimal after-sales service, has a wide range of applications, and is easy to popularize, resulting in significant social and economic benefits.

[0009] This invention proposes a method for implementing a handheld electronic bayan, employing an original split structure, reducing the number of buttons, minimizing the size of the instrument, and widening the range. This results in a split-structure handheld electronic bayan consisting of a left-hand and a right-hand instrument. The number of buttons is only slightly more than one octave, with multiple octaves switched using an octave-level switch. Playing fingering is simpler, significantly reducing the difficulty of playing and eliminating the need for large finger shifts. Although the number of buttons is reduced, the range is wider. Advanced electronic instrument chips and microprocessors are used to create a new type of electronic instrument with multiple functions, high performance, and excellent sound quality. This is achieved through the microprocessors in the left-hand and right-hand instruments. The processor module receives the switching signals from the respective note name buttons, function buttons, function keys, multi-position switches, velocity sensors, and motion data from the motion detection module. The microprocessor module determines the note name and velocity of the current button based on the note name, octave pitch, and button velocity of the detected note name button, converts it into MIDI message data, and controls the instrument module to output musical sound signals to the speaker through the MIDI interface to produce musical sounds, enabling the right hand to play the melody and the left hand to provide accompaniment. The internal functions of the left and right hands are opened, and personalized settings for note name buttons, function buttons, function keys, and voice commands are achieved by using a custom function mapping table.

[0010] The objective of this invention and the technical problem it solves are achieved by the following technical solution: According to this invention, a handheld electronic bayan is designed as a split-type handheld electronic bayan consisting of a left-hand instrument and a right-hand instrument. It includes: a bayan body, a left-hand instrument, a right-hand instrument, a shell, a key circuit board, a control circuit board, note name keys, function keys, function buttons, a multi-position switch, indicator lights, a sound sensor, a velocity sensor, a voice recognition module, a motion detection module, a microprocessor module, a Bluetooth module, a WIFI module, a power module, an instrument module, an instrument chip, an instrument amplifier, a wrist strap, a buckle, a screw, a nut, a speaker, a charging port, and a display screen.

[0011] The bayan's main body, including the left and right hands, features note name buttons, function buttons, indicator lights, a sound sensor, a wrist strap, clips, a speaker, and a charging port. The front panels of both hands include note name buttons, function buttons, and indicator lights. The note name buttons comprise 26 buttons arranged in alternating rows on the upper part of the panel, with 7 buttons each in the first and second rows on the left, and 6 buttons each in the third and fourth rows. The function buttons are 6 buttons located below the note name buttons on the lower part of the panel. The left hand provides bass accompaniment. In this section, the right hand plays the main melody; the note name buttons on the left hand are arranged according to the note name pattern of "traditional bass," while the note name buttons on the right hand are arranged according to the note name pattern of the main melody; the function buttons on the left hand have a switch for switching between "traditional bass" and "free bass," and can also be set using a multi-position switch 6 and a display screen 17. The left hand can switch between "traditional bass" and "free bass" as needed, while the note name buttons on the right hand are arranged according to the note name pattern of the main melody.

[0012] The bayan has a shell for both the left and right hands. The shell is the outer casing of the left and right hands. The shell includes a key circuit board, a control circuit board, note name keys, function keys, function buttons, multi-position switches, indicator lights, sound sensors, velocity sensors, voice recognition modules, motion detection modules, microprocessor modules, Bluetooth modules, WIFI modules, power modules, instrument modules, instrument chips, speakers, charging ports, and a display screen. The display screen, multi-position switches, and function buttons are installed on the back of the shell.

[0013] The power module is installed below the button circuit board and consists of a rechargeable battery and a power supply unit.

[0014] The key circuit board is equipped with pitch name keys, function keys, a velocity sensor, and indicator lights; the pitch name keys include 26 keys, and the function keys include 6 keys; the 26 pitch name keys are arranged in 4 columns and installed on the key circuit board in a top-to-bottom order, and the 6 function keys are installed below the pitch name keys.

[0015] The control circuit board includes a sound sensor, a voice recognition module, a motion detection module, a microprocessor module, a Bluetooth module, a musical instrument module, a musical instrument chip, a charging port, and a WIFI module. The speaker is located below the control circuit board. The sound sensor is connected to the voice recognition module. The voice recognition module, motion detection module, Bluetooth module, musical instrument module, and WIFI module are connected to the microprocessor module. The musical instrument module is connected to the audio input terminal of the Bluetooth module. The musical instrument module is connected to the speaker. The charging port is located on the side of the control circuit board.

[0016] The simplified version of the bayan has simplified the buttons on the left and right hands, with 14 note name buttons and 5 function buttons. The left hand of the simplified bayan is for bass accompaniment, and the right hand is for the melody. The note name buttons on the left hand are arranged according to the bass note names, and the note name buttons on the right hand are arranged according to the melody note names. The function buttons on the left hand also have a switch between "traditional bass" and "free bass".

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the methods and technical means of the present invention and to implement them in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0019] Figure 2 This is a diagram showing the conventional bass position arrangement of the tone name buttons in this invention;

[0020] Figure 3 This is a diagram showing the arrangement of the bass note positions on the tone name buttons of this invention;

[0021] Figure 4 This is a schematic diagram of the back-side device structure of the present invention;

[0022] Figure 5 This is a side view of the external structure of the present invention;

[0023] Figure 6 This is a schematic diagram of the keypad circuit board device structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the control circuit board device structure of the present invention;

[0025] Figure 8 This is a schematic diagram illustrating the circuit and module connection principle of the present invention;

[0026] Figure 9 This is a simplified external structure diagram of the present invention;

[0027] Figure 10 This is a simplified diagram showing the traditional bass position arrangement of the tone name buttons according to the present invention;

[0028] Figure 11 This is a simplified diagram showing the free bass position arrangement of the tone name buttons according to the present invention;

[0029] Figure 12 This is a schematic diagram of the housing design for a single speaker with three rows of buttons according to the present invention;

[0030] Figure 13 This is a schematic diagram of the three-row button dual-speaker housing design of the present invention;

[0031] Figure 14 This is a schematic diagram of the housing design for a single speaker with two rows of buttons according to the present invention.

[0032] Figure label:

[0033] 1: Bayonne body 1a: Left hand 1b: Right hand

[0034] 1c: Hand strap; 1d: Buckle; 1e: Screw.

[0035] 1f: Nut 2: Housing 3: Pitch name button

[0036] 4: Function Buttons 4a: Function Buttons 5a: Button Circuit Board

[0037] 5b: Control circuit board; 6: Multi-position switch; 6a: Thumb rest

[0038] 7: Indicator light; 8a: Sound sensor; 8b: Force sensor

[0039] 8c: Voice microphone; 9: Voice recognition module; 10: Motion detection module

[0040] 11: Microprocessor module; 12: Bluetooth module; 13: Power supply module

[0041] 14: Musical Instrument Module; 14a: Musical Instrument Chip; 14b: Musical Instrument Amplifier

[0042] 15: Speaker; 16: Charging port; 16a: Microphone jack

[0043] 16b: Magnet; 17: Display screen; 18: WIFI module Detailed Implementation

[0044] To further illustrate the technical means and effects of the present invention in achieving a handheld electronic bayan, the following detailed description of the specific implementation, structure, features and effects of a handheld electronic bayan proposed according to the present invention is provided in conjunction with the accompanying drawings and preferred embodiments.

[0045] Example 1:

[0046] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a preferred embodiment of the present invention is a handheld electronic bayanx; as Figure 1 As shown, Figure 1 This is a schematic diagram of the external structure of the present invention. The present invention innovatively transforms the traditional one-piece electronic bayan into a two-part independent structure, making the one-piece electronic bayan a split structure. At the same time, by reducing the number of buttons and shrinking the size of the instrument, a new type of handheld electronic bayan with a split structure consisting of a left-hand instrument 1a and a right-hand instrument 1b is created, providing users with more flexible and diverse usage methods and experiences, and further enhancing the attractiveness and market competitiveness of the handheld electronic bayan.

[0047] The present invention includes a bayan harp body 1, a left-hand harp 1a and a right-hand harp 1b. The bayan harp body 1 includes a left-hand harp 1a and a right-hand harp 1b. The left-hand harp 1a and the right-hand harp 1b have the same structure, but the structure is mirror symmetrical. The positions of the components and devices are also mirror symmetrical. This design is to adapt to the differences in the physiological structure of the left and right hands of the human body.

[0048] The main body 1 of the bayan is a handheld electronic bayan with a split structure consisting of a left-hand instrument 1a and a right-hand instrument 1b. The main body 1 of the bayan is composed of a left-hand instrument 1a and a right-hand instrument 1b. The surfaces of the left-hand instrument 1a and the right-hand instrument 1b include note name buttons 3, function buttons 4, indicator lights 7, sound sensors 8a, wrist straps 1c, buckles 1d, speakers 15 and charging ports 16.

[0049] The front panel of the left-hand piano 1a and the right-hand piano 1b includes note name buttons 3, function buttons 4 and indicator lights 7. The note name buttons 3 include 26 buttons, which are arranged in four alternating columns on the upper part of the panel. The first and second columns on the left each have 7 note name buttons, and the third and fourth columns each have 6 note name buttons. The function buttons 4 include 6 buttons and are located below the note name buttons 3 on the lower part of the panel.

[0050] The note name buttons 3 and function buttons 4 on the front panel of the bayan harp body 1 are mounted on the internal button circuit board 5a. The button heads protrude from under the button holes on the panel. Alternatively, membrane touch buttons can be used instead. The membrane touch buttons are fixed to the panel surface of the bayan harp body 1.

[0051] Indicator 7 is located in the indicator hole on the upper inner side of the panel of the bayanqin body 1. There is a sound sensor 8a and a charging port 16 on the outer side. The sound sensor 8a is located on the upper outer side of the bayanqin body 1, and the charging port 16 is located on the lower outer side of the bayanqin body 1.

[0052] The traditional strap-on bayan has been replaced with a handheld structure, measuring 26mm in length, 90mm in width, and 50mm in thickness, making it compact and easy to carry. This significantly simplifies the structure of the bayan. The inner sides of the left-hand instrument 1a and the right-hand instrument 1b are respectively equipped with a hand strap 1c and a buckle 1d. The buckle 1d on the hand strap 1c is used to adjust the tightness of the hand strap. When playing, the hand strap 1c fixes the hands to the inner sides of the left-hand instrument 1a and the right-hand instrument 1b for a stable grip and playing.

[0053] The speaker 15 is fixed to the back of the front panel of the bayan piano body 1 and inside the speaker hole. The speaker hole of the panel is provided with a mesh.

[0054] The left-hand piano 1a has 6 function buttons 4. The two buttons on the right are "Accompaniment Selection +" and "Accompaniment Selection -", and the two buttons on the left are "Pitch Shift +" and "Pitch Shift -". Pressing and holding the first button on the left turns the piano on or off. The second button on the left is a switch between "Traditional Bass" and "Free Bass". The right-hand piano 1b has 6 function buttons 4. The two buttons on the right are "Tone Selection +" and "Tone Selection -", and the two buttons on the left are "Pitch Shift +" and "Pitch Shift -". The first button on the left is "Volume +", and the second button is "Volume -". Pressing and holding the first button on the left turns the piano on or off.

[0055] like Figure 2 As shown, Figure 2 This is a diagram showing the arrangement of the note name buttons for the "traditional bass" of this invention. The left-hand piano 1a is the bass accompaniment part, and the right-hand piano 1b is the main melody part. The left side of the diagram shows the bass accompaniment part of the left-hand piano 1a, and the right side shows the main melody part of the right-hand piano 1b. The 26 note name buttons 3 of the left-hand piano 1a are arranged according to the "traditional bass" type pattern, and the 26 note name buttons 3 of the right-hand piano 1b are arranged according to the main melody note name pattern.

[0056] The 26 keys on the left-hand piano (1a) are arranged in a "traditional bass" pattern, divided into four columns. The first column on the left represents basic bass notes, with the note names "E, A, D, G, C, F, Bb". The second column represents major triads, with the note names "E, A, D, G, C, F, Bb". The third column represents minor triads, with the note names "A, D, G, C, F, Bb". The fourth column represents dominant seventh chords, with the note names "A, D, G, C, F, Bb".

[0057] The 26 buttons on the right-hand piano (1b) are arranged according to the note names of the main melody, divided into 4 columns. The first column on the left has 7 buttons with note names "F, G#, B, D, F, G#, B". The second column on the left has 7 buttons with note names "E, G, Bb, C#, E, G, Bb". The third column on the left has 6 buttons with note names "F#, A, C, Eb, F#, A". The fourth column on the left has 6 buttons with note names "F, G#, B, D, F, G#".

[0058] like Figure 3 As shown, Figure 3 This is a diagram showing the arrangement of the note name buttons for the free bass position in this invention. The function button 4 of the left-hand piano 1a of this invention is provided with a switch button for "traditional bass" or "free bass". It can switch between "traditional bass" and "free bass" as needed. When switched to "free bass", the note name buttons 3 are arranged according to the note name rules of "free bass". The 26 buttons of the note name buttons 3 of the left-hand piano 1a on the left side of the figure are arranged according to the note name rules of "free bass", and the 26 buttons of the note name buttons 3 of the right-hand piano 1b on the right side of the figure are arranged according to the note name rules of the main melody.

[0059] On the left-hand piano 1a, the 26 keys of note name button 3 are arranged in a "free bass" pattern, divided into four columns from bottom to top. The first column on the left has seven keys with note names "F, G#, B, D, F, G#, B"; the second column has seven keys with note names "F#, A, C, Eb, F#, A, C"; the third column has six keys with note names "G, Bb, C#, E, G, Bb"; and the fourth column has six keys with note names "G#, B, D, F, G#, B". On the right-hand piano 1b, the 26 keys of note name button 3 are also arranged according to the melody note names, and... Figure 2 Same as before, no change. The 26 buttons are divided into 4 columns. The first column on the left has 7 buttons with the note names "F, #G, B, D, F, #G, B". The second column on the left has 7 buttons with the note names "E, G, bB, #C, E, G, bB". The third column on the left has 6 buttons with the note names "#F, A, C, bE, #F, A". The fourth column on the left has 6 buttons with the note names "F, #G, B, D, F, #G".

[0060] The arrangement of the note name buttons 3 follows the default pattern of the traditional bayan piano B series, but significantly reduces the number of buttons compared to existing technologies. At the same time, the note name arrangement of the C series buttons is also provided. Users can select the C series or B series by using the multi-position switch 6 in conjunction with the display screen 17. In addition, each button of the note name buttons 3 is open, allowing users to customize the note name of each button. The function buttons 4 also support open settings, allowing users to customize their functions according to their needs.

[0061] Please see Figure 4 As shown, Figure 4 The diagram below shows the structure of the back of the device of the present invention. The left-hand instrument 1a and the right-hand instrument 1b of the bayan piano body 1 of the present invention both have a shell 2. The shell 2 is the outer shell of the left-hand instrument 1a and the right-hand instrument 1b. Their back structures are completely identical. The back of the shell 2 includes a display screen 17, a thumb rest 6a, a multi-position switch 6 and a function button 4a. The display screen 17 is located at the top of the shell 2. The thumb rest 6a is located below the display screen 17. The multi-position switch 6 is located below the thumb rest 6a. The function button 4a is located below the multi-position switch 6. The scheme of using the multi-position switch 6 to switch multiple octaves of pitch makes the range of the note name key 3 wider, increasing it to 9 octaves.

[0062] Among them, the multi-position switch 6 on the back of the housing 2 is used for switching octave pitch or as an operation switch in conjunction with the display screen 17 when setting functions. The multi-position switch 6 is a 5-position switch, using a five-way switch, divided into 4 contacts (up, down, left, right) and a middle contact. The 5 contacts are referred to as buttons respectively. It has two operation modes: step octave or fixed octave. The two operation modes are set by operating the touch screen.

[0063] Step-Octave Mode:

[0064] The up button raises the octave by one octave with each press, while the down button lowers the octave by one octave with each press. Pressing the up and middle buttons simultaneously raises the octave by two octaves, and pressing the down and middle buttons simultaneously lowers the octave by two octaves. Alternatively, the left button raises the octave by two octaves with each press, and the right button lowers the octave by two octaves with each press. The middle button resets the octave; pressing the middle button alone resets the octave to the original default octave. The step mode maintains the currently selected octave with each button press, and resets to the original default octave with the middle button. The control range of the step octave mode is 9 octaves.

[0065] Fixed octave mode:

[0066] The top button controls octave 1, and when pressed, it controls octave 1. The bottom button controls octave -1, and when pressed, it controls octave -1. Pressing the top and middle buttons simultaneously controls octave 2, and when pressed, it controls octave 2. Pressing the bottom and middle buttons simultaneously controls octave -2, and when pressed, it controls octave -2. Alternatively, the left button controls octave 2, and when pressed, it controls octave 2. The right button controls octave -2, and when pressed, it controls octave -2. There are a total of 4 options. Releasing the buttons restores the initial default octave. The fixed octave mode is effective when the button is pressed, and returns to the initial default octave when the button is released. The control range of the fixed octave mode is 5 octaves.

[0067] The multi-position switch 6 also works in conjunction with the display screen 17 to select between the "traditional bass" and "free bass" options;

[0068] Function button 4a is a shortcut button for directly executing functions. In addition to the default function, the function of each button of function button 4a is open to the outside and can be customized as a shortcut button. Display screen 17 is a color LCD screen that uses serial communication.

[0069] Please see Figure 5 As shown, Figure 5 This is a side view of the external structure of the present invention. The left-hand instrument 1a and the right-hand instrument 1b of the main body 1 of the bayan piano of the present invention have the same structure and are mirror images of each other. The description will now take the left-hand instrument 1a as an example. Figure 5 The side of the housing 2 shown has a sound sensor 8a, a charging port 16, a microphone socket 16a, and a magnet 16b. The sound sensor 8a, charging port 16, microphone socket 16a, and magnet 16b are all located on the side of the housing 2 without the wrist strap 1c. The sound sensor 8a is located at the top, the charging port 16 is located at the bottom, and the microphone socket 16a is located above the charging port 16 and below the sound sensor 8a. The magnet 16b consists of two magnets located at the top and bottom ends of the side of the housing 2. When needed, the left-hand piano 1a and the right-hand piano 1b can be attracted together by the magnet 16b on the side of the housing 2, making the playing more stable. The magnet 16b is embedded inside the side of the housing 2. The sound sensor 8a, charging port 16, and microphone socket 16a are installed on the control circuit board 5b inside the opening on the side of the housing 2.

[0070] Figure 5The left side of the external structure side view diagram shows the components at the bottom of the housing 2, and the right side shows the components at the front of the housing 2. The left side includes a display screen 17, a thumb rest 6a, a multi-position switch 6, and a function button 4a. The display screen 17 is embedded in the upper part of the housing 2. Below the display screen 17 is the thumb rest 6a, below the thumb rest 6a is the multi-position switch 6, and below the multi-position switch 6 is the function button 4a. The right side includes a tone name button 3, a function button 4, and a speaker 15. The tone name button 3 is located at the top, the function button 4 is in the middle, and the speaker 15 is located in the lower part of the housing 2.

[0071] Please see Figure 6 As shown, Figure 6 The diagram below illustrates the structure of the keypad circuit board device of this invention. The left-hand instrument 1a and right-hand instrument 1b of the bayan piano body 1 each have a housing 2. The housing 2 is the outer shell of the left-hand instrument 1a and right-hand instrument 1b. Inside the housing 2 is a keypad circuit board 5a, which is mounted and fixed inside the panel of the housing 2. The keypad circuit board 5a is equipped with note name buttons 3, function buttons 4, a sound sensor 8a, a velocity sensor 8b, and an indicator light 7. A power module 13 is mounted below the keypad circuit board 5a, consisting of a rechargeable battery and a power supply unit. A speaker 15 is located below the keypad circuit board 5a.

[0072] The key circuit board 5a has 26 note name buttons 3 and 6 function buttons 4. The 26 note name buttons 3 are arranged in four columns in an up-down order on the upper part of the key circuit board 5a. The 6 function buttons 4 are installed below the note name buttons 3. The 26 note name buttons 3 are arranged in four columns in an alternating pattern on the upper part of the key circuit board 5a. The first and second columns on the left each have 7 note name buttons, and the third and fourth columns each have 6 note name buttons. The 6 function buttons 4 are installed on the lower part of the key circuit board 5a below the note name buttons 3. The heads of the note name buttons 3 and the function buttons 4 protrude from the button holes on the panel.

[0073] Indicator light 7 is installed on the inner side of the upper part of the keypad circuit board 5a. Force sensor 8b includes 4 sensors, which are installed at the 4 corners of the back of the keypad circuit board 5a to sense the force transmitted by pressing the keypad 3. At least 2 sensors are used.

[0074] Please see Figure 7 As shown, Figure 7 This is a schematic diagram of the control circuit board device structure of the present invention. The housing 2 shown in the figure contains a control circuit board 5b and a speaker 15. The control circuit board 5b is installed below the button circuit board 5a.

[0075] Below the button circuit board 5a is a control circuit board 5b, which integrates a sound sensor 8a, a voice microphone 8c, a voice recognition module 9, a motion detection module 10, a microprocessor module 11, a Bluetooth module 12, a musical instrument module 14, a musical instrument chip 14a, a musical instrument amplifier 14b, a charging port 16, a microphone socket 16a, and a WIFI module 18.

[0076] The sound sensor 8a, microphone socket 16a and charging port 16 are located on the side of the control circuit board 5b, with the sound sensor 8a on top and the charging port 16 on the bottom. The microphone socket 16a is located in the middle between the sound sensor 8a and the charging port 16. The voice microphone 8c is located in the middle of the upper part of the control circuit board 5b. The speaker 15 is located below the control circuit board 5b.

[0077] Among them, the voice microphone 8c on the control circuit board 5b is connected to the voice recognition module 9, the voice recognition module 9, the motion detection module 10, the Bluetooth module 12, the musical instrument module 14 and the WIFI module 18 are connected to the microprocessor module 11, the musical instrument module 14 is connected to the audio input terminal of the Bluetooth module 12, and the musical instrument module 14 is connected to the speaker 15.

[0078] The instrument module 14 includes an instrument chip 14a and an instrument amplifier 14b. The output of the instrument amplifier 14b is connected to the speaker 15. The instrument chip 14a has a built-in input amplifier, and the input of the input amplifier is connected to the sound sensor 8a.

[0079] Please see Figure 8 , Figure 8 The circuit and module connection principle diagram of the present invention is shown below. The circuit and module parts of the left-hand piano 1a and right-hand piano 1b of the present invention mainly include a microprocessor module 11, an instrument module 14, a Bluetooth module 12, a motion detection module 10, a voice recognition module 9, a display screen 17, a note name key 3, a function key 4, a function button 4a, a multi-position switch 6, a sound sensor 8a, a force sensor 8b, a voice microphone 8c, a microphone socket 16a, a power module 13, a charging port 16, and a WIFI module 18.

[0080] The microprocessor module 11 connects to the note name button 3, function button 4, function button 4a, multi-position switch 6, force sensor 8b, voice recognition module 9, motion detection module 10, Bluetooth module 12, musical instrument module 14, charging port 16, display screen 17, and WIFI module 18. The musical instrument module 14 includes a musical instrument chip 14a and a musical instrument amplifier 14b. The musical instrument chip 14a is connected to the musical instrument amplifier 14b, Bluetooth module 12, sound sensor 8a, and microphone socket 16a. The voice recognition module 9 is connected to a voice microphone 8c.

[0081] The microprocessor module 11 receives switch signals from the note name key 3, function key 4, function button 4a and multi-position switch 6 at its IO input terminal. The force sensor 8b sends the converted force signal to the microprocessor module 11. The motion detection module 10 transmits motion data to the microprocessor module 11 through the IIC interface. The microprocessor module 11 sends data to the instrument module 14 through the MIDI communication interface. The instrument module 14 outputs a musical sound signal to the speaker 15 to emit musical sound. The instrument module 14 outputs a musical sound signal to the audio input terminal of the Bluetooth module 12. The Bluetooth module 12 sends a Bluetooth audio signal to an external speaker.

[0082] The sound sensor 8a transmits the electrical signal of the voice command to the voice recognition module 9. The voice command data recognized by the voice recognition module 9 is transmitted to the microprocessor module 11 through the SPI interface. The microprocessor module 11 outputs the control indicator 7 and sends the display data to the display screen 17 through the serial port.

[0083] Function button 4 outputs a switch signal to microprocessor module 11, which controls instrument module 14 to execute the operation corresponding to function button 4.

[0084] To better understand the technical means of the specific implementation of the present invention, the connection relationship of the circuit and module is further described in detail below;

[0085] Microprocessor module 11 is the core processor of this system, responsible for detecting, processing and controlling the peripheral modules of the entire system. Microprocessor module 11 contains a microprocessor chip, which uses STM32F103 or 407 series. It detects, communicates with and controls external circuit modules through the following interfaces, including USART1_TX, USART1_RX, USART2_TX, USART3_TX, USART3_RX, UART4_TX, UART4_RX, SCL, SDA, INT, ADC_A_IN, P_SD, PD_OUT, PE12, PE13, PE14, PE15, PB12, PB13, Keys-3, Keys-4, Keys-4a, Keys-6 and LED_OUT.

[0086] Among them, USART1_TX and USART1_RX are serial communication interfaces for programming chips. Using a USB to TTL serial cable, the computer sends data to the microprocessor programming program through the TX and RX terminals in the charging port 16. USART1_TX and USART1_RX are also connected to the WiFi module 18 through the switching of JB1 and JB2 of the connector, realizing local or remote chip programming with time-sharing connection of the USART1_TX and USART1_RX interfaces. During the production process, JB1 and JB2 of the connector are disconnected, and the chip is programmed using a USB to TTL serial cable. During the use of the finished product, JB1 and JB2 of the connector are in the ON state for remote programming or upgrading of the program. PD_OUT is the IO output terminal of the microprocessor module 11, used to control the WiFi module 18 to be enabled or disabled. The WiFi module 18 uses the commonly used ESP8266 serial WiFi chip.

[0087] Among them, USART2_TX is the transmitter of the serial communication interface that sends MIDI messages to the instrument module 14, and makes the instrument module 14 emit musical signals by sending MIDI messages. USART3_TX and USART3_RX are serial communication interfaces that receive data sent by the speech recognition module 9. SCL and SDA are SPI communication interfaces that receive data sent by the motion detection module 10. INT is the interrupt input terminal that responds to the interrupt request signal sent by the motion detection module 10. ADC_A_IN is the AD conversion input terminal of the force sensor 8b that detects the force of the key. P_SD is the output terminal that controls the power amplifier 14b of the instrument amplifier to enable.

[0088] The Keys-3 bus detects 26 I / O inputs of the key name button 3, the Keys-4 bus detects 6 I / O inputs of the function button 4, the Keys-4a bus detects 16 I / O inputs of the function button 4a, and the Keys-6 bus detects 5 I / O inputs of the multi-position switch 6.

[0089] The instrument module 14 contains an instrument chip 14a and an instrument amplifier 14b. The instrument chip 14a is a professional electronic instrument chip with hundreds of instrument timbres and various percussion accompaniments. The instrument chip 14a is model SAM2695, which is a single-chip integrated audio processing chip. It has a MIDI control processor, serial and parallel interfaces, a complete GM sound set, supports synthesized audio, and has a universal MIDI wavetable with hundreds of instrument timbres. It supports universal MIDI compatible effects, including reverb and chorus, and also supports 64 / 38 channel multi-effects, spatial stereo effects, microphone input, microphone echo function, input amplifier, 4-band stereo equalizer, audio stereo circuitry, and velocity, pitch bend and glissando control. The built-in functions are very powerful. For specific functions and usage methods, please refer to the chip technical manual. The instrument chip 14a can also use SAM5000 series chips such as SAM5704 or SAM5916.

[0090] Among them, the instrument chip 14a has powerful functions, but very few input and output pins for external circuits, which significantly simplifies the external circuits. Only three key input and output pins are needed: MIDI IN, AUDIO_L, and AUDIO_R. MIDI IN is the input pin for MIDI messages, and AUDIO_L and AUDIO_R are the left and right channel audio output pins. The USART2_TX transmitter of the microprocessor module 11 sends MIDI message signals to the instrument chip 14a through the MIDI IN pin, calls the wavetable data inside the instrument chip 14a to generate musical tone signals, outputs the musical tone signals through the AUDIO_L and AUDIO_R pins, and sets and controls the internal functions of the instrument chip 14a.

[0091] Among them, the output terminals AUDIO_L and AUDIO_R of the instrument chip 14a are connected to the input terminals IN_L and IN_R of the instrument amplifier 14b, respectively. The AOUT pin is the output terminal of the instrument amplifier 14b, which drives the speaker 15 to emit musical sounds. The amplifier chip in the instrument amplifier 14b uses HD863. Higher fidelity and higher performance amplifier chips, as well as dual-channel amplifier chips, can also be used as needed.

[0092] The instrument chip 14a also brings out the MICIN pin of the internal input amplifier. The internal input amplifier is enabled by controlling the MIDI message. The MICIN pin is connected to the microphone jack 16a, which is connected to the sound sensor 8a. The audio signal is input from the sound sensor 8a or through the microphone jack 16a, amplified by the internal input amplifier, and output by the AUDIO_L and AUDIO_R pins to the instrument amplifier 14b and the Bluetooth module 12.

[0093] Bluetooth Module 12 is a wireless Bluetooth audio transceiver module that integrates Bluetooth stereo audio transmission and reception. It adopts Bluetooth 5.3 protocol version, supports automatic reconnection to the last automatically connected Bluetooth device, and supports serial port AT command configuration to connect to a specified Bluetooth device name, obtain search results, modify Bluetooth name, control connection and disconnection, etc. The module works in Bluetooth audio transmission mode or Bluetooth audio reception mode. This system is only used in Bluetooth audio transmission mode. The IN_L and IN_R pins are the left and right channel audio input terminals. Bluetooth audio is sent to external Bluetooth speakers and other peripherals in Bluetooth audio transmission mode. The RX receiving terminal and TX transmitting terminal pins are serial communication interfaces, which are connected to the UART4_TX terminal and UART4_RX terminal of the microprocessor module 11, respectively, to control the opening or closing of Bluetooth Module 12 for power saving. The LED output pin is connected to resistor R36 and LED1 as an indicator of the working status of Bluetooth Module 12.

[0094] The motion detection module 10 uses the MPU-9250 chip, which is widely used in handheld instruments, robots, navigation, positioning, flight, model aircraft, and balance vehicles. The chip integrates a 3-axis gyroscope, a 3-axis accelerometer, and a 3-axis magnetometer sensor. It uses a 16-bit ADC to measure the gyroscope, accelerometer, and magnetometer, converting the measured analog signals into digital signals and outputting them through an I2C interface. The acceleration measurement range is ±2 / ±4 / ±8 / ±16g, the gyroscope measurement range is ±250 / ±500 / ±1000 / ±2000° / second, and the magnetometer measurement range is... Measurement range: ±4800μT; The motion detection module 10 is composed of an MPU-9250 chip and resistive and capacitive components. The MPU-SCL, MPU-SDA and MPU-INT are three pins that cooperate with external circuits. Among them, the MPU-SCL and MPU-SDA pins are connected to pull-up resistors R8 and R9. MPU-SCL is the I2C clock line, MPU-SDA is the I2C data line, and MPU-INT is the interrupt output terminal. When working in interrupt mode, it provides the INT interrupt input terminal signal of the microprocessor module 11 to respond to and process motion signals in a timely manner.

[0095] The speech recognition module 9 uses an ASRPRO chip with a built-in neural network processor, supporting DNN, TDNN, RNN and other neural networks and convolution operations. It supports speech recognition, voiceprint recognition, speech enhancement, and speech detection, and has strong echo cancellation and environmental noise suppression capabilities. The chip also supports multiple languages ​​including Chinese and English. The function of the speech recognition module 9 is to convert speech into digital signals and provide them to the microprocessor module 11 to execute corresponding voice commands. The speech recognition module 9 has MIC+, MIC-, UART2_RX, UART2_TX, UART0_TX, and UART0_RX pins. MIC+ and MIC- are microphone input terminals, connected to a voice microphone 8c to receive the speech signal. The UART2_RX and UART0_RX pins of the speech recognition module 9... RT2_TX is a communication interface connected to the USART3_TX and USART3_RX interfaces of the microprocessor module 11. It transmits the voice recognition result signal to the microprocessor module 11 to execute voice control operations. The UART0_TX and UART0_RX pins are the download interface for burning custom voices to the voice recognition module 9. They are connected to socket J10. The computer's USB interface is connected to a USB to TTL data cable through socket J10 to burn custom voice commands to the voice recognition module 9. The graphical programming software provided by the vendor is used to compile voice keywords, broadcast voices and control logic to realize voice interaction and control. The voice recognition module 9 also has speaker output pins SPK+ and SPK-, which are connected to socket J3. When needed, a speaker is connected to emit voice broadcasts.

[0096] Display screen 17 is a color LCD screen, mainly used for displaying working status and assisting in the display of function parameters. It uses SPI serial communication to transmit display data. Display screen 17 has pins SCL, SDA, RES, DC, CS, and BL. Among them, pin SCL is the clock line, SDA is the data line, RES is the reset, DC is the data or instruction select, CS is the chip select, and BL is the backlight control terminal. When the display is not needed, the backlight can be turned off through the BL terminal. When transmitting display data, it is done through the SCL and SDA pins using the SPI interface communication method.

[0097] The tone name key 3, function key 4, function button 4a and multi-position switch 6 are all switches. Each switch is connected to the IO input port of the microprocessor in the microprocessor module 11 in a one-to-one relationship. Each switch occupies one input port. The advantage of the one-to-one connection is that when multiple switches are pressed at the same time, they respond and act simultaneously. Although it occupies more interface resources than the matrix scanning method, it is more flexible in application and has stronger functions.

[0098] Force sensor 8b includes four sensors B1, B2, B3, B4, resistors R2, R3, R4, capacitor C2, diode D2, and operational amplifier OPA1. It is connected to the input terminal ADC_A_IN of the AD converter in microprocessor module 11 through the positive terminal BO and the negative terminal B_AG. The amplified force signal output is measured by the AD converter. The voltage amplitude of the signal represents the force of the button press and is used to control the volume of the button press.

[0099] The power module 13 includes a battery and a low-dropout regulator. The charging port 16 is a USB socket that charges the battery with its built-in charging circuit. The battery supplies power to the circuit and outputs a stable 3.3V voltage through the low-dropout regulator to power the 3.3V circuit. In addition to charging the battery, the charging port 16 also has the function of programming. Using a USB to TTL level serial download cable, the program is programmed into the microprocessor in the microprocessor module 11 through the computer's USB port. The UD- and UD+ terminals of the USB socket are connected to the RX and TX terminals of the download cable, respectively. The RX and TX terminals are connected to the USART1_TX and USART1_RX terminals of the microprocessor module 11 to transmit data and program via serial communication.

[0100] Further connection relationships of the circuit modules:

[0101] The main pins of the microprocessor module 11 that connect to external circuits are USART1_TX, USART1_RX, USART2_TX, USART3_TX, USART3_RX, UART4_TX, UART4_RX, PD_OUT, SCL, SDA, INT, ADC_A_IN, P_SD, PE12, PE13, PE14, PE15, PB12, PB13, Keys-3, Keys-4, Keys-4a, Keys-6, and LED_OUT;

[0102] Among them, the USART1_TX terminal of the microprocessor module 11 is connected to the RX terminal of the charging port 16, and the USART1_RX terminal is connected to the TX terminal of the charging port 16.

[0103] Among them, the USART1_TX terminal of the microprocessor module 11 is connected to the RXD terminal of the WiFi module 18 through connector JB1, the USART1_RX terminal of the microprocessor module 11 is connected to the TXD terminal of the WiFi module 18 through connector JB2, and the PD_OUT terminal of the microprocessor module 11 is connected to the CH_PD terminal of the WiFi module 18.

[0104] The USART2_TX transmitter of the microprocessor module 11 is connected to the MIDI IN input of the instrument chip 14a in the instrument module 14. The MIDI IN of the instrument chip 14a is connected to a pull-up resistor R34, and the other end of the pull-up resistor R34 is connected to the positive power supply. The left channel audio output AUDIO_L of the instrument chip 14a is connected to the input IN_L of the instrument amplifier 14b and the input IN_L of the Bluetooth module 12. The right channel audio output AUDIO_R of the instrument chip 14a is connected to the input IN_R of the instrument amplifier 14b and the input IN_R of the Bluetooth module 12. The P_SD output of the microprocessor module 11 is connected to the enable SD of the instrument amplifier 14b to control the instrument amplifier 14b to be enabled or disabled.

[0105] The USART3_TX and USART3_RX of the microprocessor module 11 are serial communication interfaces for receiving data sent by the speech recognition module 9. The USART3_TX of the microprocessor module 11 is connected to the UART2_RX terminal of the speech recognition module 9, and the USART3_RX of the microprocessor module 11 is connected to the UART2_TX terminal of the speech recognition module 9.

[0106] The PE12, PE13, PE14, PE15, PB12 and PB13 pins of the microprocessor module 11 are respectively connected to the SCL, SDA, RES, DC, CS and BL pins of the display screen 17;

[0107] The UART4 port of the microprocessor module 11 sends serial commands to the Bluetooth module 12 to control its enable or disable to save power;

[0108] The UART4_TX pin of the microprocessor module 11 is connected to the RX pin of the Bluetooth module 12, and the UART4_RX pin of the microprocessor module 11 is connected to the TX pin of the Bluetooth module 12.

[0109] The SCL and SDA terminals of the microprocessor module 11 are communication interfaces for receiving data sent by the motion detection module 10. The INT terminal is an interrupt input terminal that responds to the interrupt request signal sent by the motion detection module 10. Specifically, the SCL terminal of the microprocessor module 11 is connected to the MPU-SCL terminal of the motion detection module 10, the SDA terminal of the microprocessor module 11 is connected to the MPU-SDA terminal of the motion detection module 10, and the INT terminal of the microprocessor module 11 is connected to the MPU-INT terminal of the motion detection module 10.

[0110] The ADC_A_IN input terminal of the AD converter of the microprocessor module 11 is connected to the positive terminal BO of the output terminal of the force sensor 8b, and the analog ground wire AG terminal is connected to the negative terminal B_AG of the force sensor 8b.

[0111] In the circuit of force sensor 8b, four sensors B1, B2, B3, and B4 are connected in series with resistor R3. These four sensors are mounted at the four corners of the button circuit board 5a, converting the pressure generated by pressing the button into a voltage signal. The four sensors collectively sense the pressure applied to each button. Their series connection allows the signals from the four sensors to be superimposed into a sum of four voltage signals. The positive and negative terminals of the sensor signals are connected in parallel with resistor R2, capacitor C2, and diode D2, with the positive terminal of the sensor signal connected to the negative terminal of the diode. The negative terminal of the signal is connected to the positive terminal of the diode to remove the negative signal generated when the button is released. The positive terminal of the sensor signal is connected to the input terminal of the resistor R4 and the op-amp OPA1. The output terminal BO of the op-amp OPA1 is connected to the ADC_A_IN of the AD converter of the microprocessor module 11. The negative terminal of the signal serves as the ground terminal B_AG of the output signal. The B_AG terminal is connected to the analog ground terminal AG of the AD converter of the microprocessor module 11. The circuit of the force sensor 8b is suitable for resistance strain gauge or piezoelectric ceramic sensors. If the amplitude of the signal sensed by the sensor is high enough, the op-amp OPA1 can be omitted.

[0112] The 26 IO input terminals of Keys-3 of the microprocessor module 11 are respectively connected to each key of the note name key 3;

[0113] The six I / O inputs of Keys-4 of microprocessor module 11 are respectively connected to each button of function button 4;

[0114] The 16 I / O inputs of Keys-4a of microprocessor module 11 are respectively connected to each button of function button 4a;

[0115] The five I / O inputs of Keys-6 of microprocessor module 11 are respectively connected to each switch of multi-bit switch 6;

[0116] The LED_OUT output terminal of the microprocessor module 11 is connected to resistor R32. The other end of resistor R32 is connected to the positive terminal of the LED indicator 7. The negative terminal of the LED indicator 7 is connected to ground GND.

[0117] Work steps and operations:

[0118] 1. Control of the musical instrument module by the microprocessor module

[0119] The microprocessor module 11 in the left-hand piano 1a and the right-hand piano 1b contains a microprocessor and a signal amplifier, and the microprocessor contains an AD converter.

[0120] The microprocessor module 11 controls the operation of the instrument module 14 through the MIDI interface. The instrument chip 14a in the instrument module 14 has a built-in input amplifier and audio stereo circuit. The microprocessor module 11 can send MIDI commands to the instrument chip 14a as needed to control the input amplifier and audio stereo circuit to turn on or off.

[0121] 2. Signal processing during performance

[0122] During the performance, the microprocessor module 11 detects the signals of each key of the note name button 3 and each button of the multi-position switch 6 in real time. Each key of the note name button 3 corresponds to a note name. The microprocessor in the microprocessor module 11 determines the current octave pitch based on the detected note name of the note name button 3 and the signal of the multi-position switch 6. At the same time, the microprocessor module 11 controls the AD converter to convert the electrical signal of the pressed button force sensed by the velocity sensor 8b into a digital quantity. The microprocessor module 11 synthesizes the note name, octave pitch and button force value corresponding to the current note name button 3 into a MIDI message format and sends the MIDI message data to the instrument chip 14a in the instrument module 14 through the MIDI interface, so that it generates a musical tone signal with the current octave pitch and velocity control. The built-in audio stereo circuit of the instrument chip 14a outputs the musical tone signal to the instrument amplifier 14b in the instrument module 14, which drives the speaker 15 to emit musical tone. The performer can play the main melody and accompaniment through the right hand piano 1a and the left hand piano 1b.

[0123] 3. Karaoke Function Implementation

[0124] The microprocessor module 11 sends MIDI messages to the instrument chip 14a to control the built-in input amplifier. The sound sensor 8a converts the singing sound into an audio signal and sends it to the built-in input amplifier of the instrument chip 14a. Through the built-in stereo audio circuit of the instrument chip 14a, the audio signal of the singing is output to the instrument amplifier 14b in the instrument module 14, which drives the speaker 15 to emit the singing sound, thus realizing the karaoke effect.

[0125] 4. Function buttons

[0126] The performer operates the function buttons 4 of the left-hand piano 1a and the right-hand piano 1b respectively, outputting switch signals to the microprocessor module 11, controlling the instrument module 14 to execute the operation corresponding to the function button 4. The function button 4 outputs switch signals to the microprocessor module 11. The 6 IO input terminals of the microprocessor in the microprocessor module 11 detect the signals of the 6 buttons of the function button 4 in real time, determine the function corresponding to the current button, and control the instrument chip 14a in the instrument module 14 to perform the corresponding operation through MIDI interface communication, including timbre selection, accompaniment selection, pitch shifting, volume adjustment, free bass conversion, power on or power off operations;

[0127] 5. Customization of function buttons

[0128] Since the number of function buttons 4 is limited, the number of functions that can be directly operated during performance is also limited. Therefore, the function buttons 4 are made customizable. Users can customize the operation functions that best suit their needs as shortcut buttons for direct operation, and customize the functions that need to be directly operated to the function buttons 4a on the back of the housing 2. This allows the function buttons 4 and function buttons 4a to be used in a customized combination. When needed, function buttons 4 can also be customized to be the note names of note name buttons 3 to increase the number of note name buttons 3. Conversely, some of the note name buttons 3 can also be customized to be the functions of function buttons 4.

[0129] Furthermore, voice commands are used to execute direct operation commands. The voice microphone 8c converts the received voice commands into electrical signals and sends them to the voice recognition module 9 for voice recognition. The recognized command result data is transmitted to the microprocessor module 11 via SPI interface communication. The microprocessor module 11 controls the instrument chip 14a in the instrument module 14 to execute corresponding voice operation commands such as accompaniment, timbre, pitch shifting, volume, free bass switching, power on or power off, etc., based on the received voice commands via MIDI interface communication, making operation more convenient and faster.

[0130] 6. Customization of function buttons

[0131] In addition to their default functions, the 16 buttons on the back of the casing 2, function button 4a, have their functions exposed. Users can redefine the function of each button as needed, customizing function button 4a into convenient shortcut buttons for one-click activation. For example, they can be defined as commonly used timbres, modes, accompaniment, vocals, or percussion, or used as shortcut keys for timbre switching (such as piano, violin, or oboe), and mode switching (such as shortcut keys for C major, D major, and F major), allowing for personalized instrument configuration.

[0132] 7. Customization of note name buttons

[0133] In addition to the customizable settings of function button 4 and function button 4a, the note name of note name button 3 can also be customized. In summary, by designing the functions of note name button 3, function button 4 and function button 4a in an open manner, the electronic bayan piano becomes more personalized and diverse.

[0134] 8. The purpose of the function mapping table

[0135] The microprocessor modules 11 of the left-hand piano 1a and the right-hand piano 1b respectively store their own function correspondence tables. The function correspondence tables are used to define the relationship between the note name key 3, function key 4, function button 4a and voice command and their functions. The microprocessor controls the instrument module (14) to emit musical signals or perform related operations according to its corresponding function. In addition to normal use, the function correspondence tables are also open to the public. Users can modify the function correspondence tables by cooperating with the multi-position switch 6 and the display screen 17 to change its corresponding function options, thereby realizing the personalized customization settings of the handheld electronic bayan.

[0136] 9. How to customize settings

[0137] The operation of custom settings for the tone name button 3, function button 4, function button 4a, and voice commands is performed through the cooperation of the multi-position switch 6 and the display screen 17. The operation method and steps are as follows: Press and hold the middle button of the multi-position switch 6 on the back of the housing 2 for 5 seconds twice to enter the setting state. The left and right buttons are left and right movement keys, for example, used to switch between number and function type. The up and down buttons are up and down movement keys, for example, used to select the button number. The middle button is short-pressed to "confirm" and long-pressed to exit. During the setting process, the microprocessor module 11 controls the display screen 17 through the serial port to cooperate with the operation of the multi-position switch 6 to display. After exiting, the microprocessor module 11 stores the set function data in the flash memory inside the microprocessor and re-initializes the custom data.

[0138] 10. Example of a function mapping table

[0139] Please refer to Tables 1 and 2. Table 1 is the function correspondence table for the note name button 3, and Table 2 is the function correspondence table for the function button 4. Tables 1 and 2 are two function correspondence tables in this system. The following will use these two function correspondence tables as examples to further explain them.

[0140] Please refer to Table 1. Table 1 is a table of correspondence between the number of the note name button 3 on the right-hand piano 1b and the function of the note name. It is one of the function correspondence tables in the system. The data of the function correspondence table is stored in the microprocessor module 11.

[0141] Table 1:

[0142]

[0143] Table 1 is a schematic diagram of the function correspondence table, which is divided into two columns in tabular form. The left column is the "Pitch Name Button Number" item, where the number represents the position of the button. The right column is the "Name Item" corresponding to the pitch name button 3. When it is necessary to customize the function of the pitch name button 3, it can be done by operating the buttons of the multi-position switch 6 and the display screen 17. Changing the "Pitch Name" item of the pitch name button 3 in the function correspondence table changes the pitch name of the pitch name button 3. For example, to change the pitch name of button number 4 in Table 1 from "D" to "C", first operate the up and down buttons of the multi-position switch 6 to select the row where button number 4 is located, press the confirmation button, then press the up and down buttons again to select the pitch name "C", and press the confirmation button to complete the modification. Repeat the above operation to modify other pitch name buttons. Press and hold the confirmation button to exit the current operation and save the data of the modified function correspondence table to the flash memory inside the microprocessor of the microprocessor module 11. During the operation, the display screen 17 displays the options and operation prompts for each step.

[0144] By setting the note name button 3 in the function correspondence table in an open manner, the note name of the button can be redefined, the arrangement order of the note name of the button can be changed, and the note name button 3 can be set to an arrangement pattern and fingering similar to other instruments. The system has a variety of default note name button 3 arrangement patterns and fingerings for instruments. The button of the multi-position switch 6 and the display screen 17 are used to select and switch, eliminating the need to set each button individually.

[0145] During performance, when a key in note name button 3 is pressed, the microprocessor in microprocessor module 11 extracts the note name or function name corresponding to the key in the function table, as well as the current velocity data and the state of multi-bit switch 6, and converts them into the corresponding MIDI message code. This code is then sent to instrument chip 14a in instrument module 14 via MIDI interface communication, controlling instrument chip 14a to generate musical tone signals.

[0146] Please refer to Table 2. Table 2 shows the numbering of the function key 4 of the right-hand piano 1b and the corresponding function table. It is also one of the system default corresponding tables. The table is divided into two columns, the left column is the "function key 4 number" and the right column is the "function name" corresponding to the function key 4.

[0147] The following explanation uses the function correspondence table of function key 4 shown in Table 2 as an example.

[0148] Table 2

[0149] Function button number Function Name 1 Volume down / Power off 2 Volume + / Power On 3 Pitch shift - 4 Pitch shift + 5 timbre+ 6 timbre-

[0150] When the function of function button 4 needs to be customized, it is done by operating the buttons of multi-position switch 6 in conjunction with display screen 17, similar to the open operation principle of tone name button 3. For example, to change the function of button number 3 in Table 2 from "pitch shift" to "timbre", first operate the up and down buttons of multi-position switch 6 to select button row 3, then press the confirmation button, then press the up and down buttons again to select "timbre", and press the confirmation button to complete the setting. Repeat the above operation to set other function buttons. Press and hold the confirmation button to exit, and save the modified data to the flash memory inside the microprocessor of microprocessor module 11 for long-term storage.

[0151] When function key 4 is pressed, the microprocessor extracts the function corresponding to the pressed function key 4 from the function mapping table, converts it into a MIDI message code, and sends it to the instrument chip 14a in the instrument module 14 through the MIDI interface communication method to execute the corresponding function.

[0152] In addition to using the multi-position switch 6 to modify the function correspondence table for custom operations, voice commands can also be used to replace the multi-position switch 6 for operation. The voice operation commands include: up, down, left, right, confirm, and exit. During the setting process, the voice microphone 8c converts the received voice commands into electrical signals and sends them to the voice recognition module 9 for voice recognition. The voice recognition module 9 transmits the recognized command result data to the microprocessor module 11 via SPI interface communication. The microprocessor module 11 controls the display screen 17 through the serial port to display the voice operation commands. After the setting is completed and exited, the microprocessor module 11 stores the set data in the internal flash.

[0153] Through the above-mentioned customizable open settings, users can redefine the key note names as needed, making the invention more personalized and diversified, which is conducive to promoting the innovative development of electronic bayan piano technology and applications.

[0154] In addition to allowing users to customize the function settings table, it also provides various instrument fingerings, as well as the default combination modes of function button 4 and function button 4a for users to choose from.

[0155] Furthermore, voice commands are used to directly operate the correspondence in the function correspondence table. The voice command received by the voice microphone 8c is converted into an electrical signal and sent to the voice recognition module 9 for voice recognition. The recognized command result data is transmitted to the microprocessor module 11 via SPI interface communication. The microprocessor module 11 selects the function corresponding to the tone name key 3, function key 4, or function button 4a according to the received voice command, and displays it on the display screen 17, as well as answer confirmation and authorization verification to avoid operation errors. Then, the correspondence in the function correspondence table is directly modified to make the operation more convenient.

[0156] The indicator light 7 is driven by the output terminal LED_OUT in the microprocessor module 11. It can be used as a power indicator, button action, voice signal, signal transmission or low voltage display. Different on / off times or flashing frequencies are used as simple indicators of working status and information.

[0157] Among them, the force sensor 8b includes a resistance strain gauge or piezoelectric ceramic sensor that can sense the force of pressing the tone name key 3;

[0158] Among them, the sound sensor 8a can also convert the singer's singing voice into an audio signal, which is sent to the input amplifier built into the instrument chip 14a in the instrument module 14 for amplification, and then output the musical sound signal through the audio stereo circuit to the instrument amplifier 14b in the instrument module 14, which drives the speaker 15 to emit the singing voice in real time.

[0159] The motion detection module 10 can detect the motion data of the left-hand piano 1a and the right-hand piano 1b. While playing music, it simulates the movements of percussion instruments to play percussion accompaniment. The motion detection module 10 calculates the motion data such as posture, angle, and speed through the core algorithm of posture dynamics inside the module. It sends the data to the microprocessor module 11 for further analysis and calculation through the IIC interface communication method to obtain the type of percussion instrument and the data of the striking action of the body movement simulation. It sends MIDI message signals to the instrument chip 14a in the instrument module 14 through the MIDI serial port to emit the corresponding percussion accompaniment tone signal. The signal is sent to the instrument amplifier 14b inside the instrument module 14 to drive the speaker 15 to emit the percussion accompaniment tone. This allows the percussion accompaniment generated by the simulated body movement to be played while playing music with the note name keys. The type of percussion instrument and the striking action of the simulated body movement can be mastered through simple learning and training.

[0160] By employing a professional electronic musical instrument chip, this device offers hundreds of instrument timbres and various percussion accompaniments, leveraging the capabilities of modern electronic musical instrument chips. The instrument chip 14a is model SAM2695. The microprocessor controls the operation of the instrument chip 14a by sending MIDI messages via MIDI serial communication. This is a single-chip integrated audio processing chip with a MIDI control processor, serial and parallel interfaces, a complete built-in GM sound set, support for synthesized audio, and a built-in universal MIDI wavetable with hundreds of instrument timbres. It supports universal MIDI-compatible effects, including reverb and chorus, and also supports 64 / 38-channel multi-effects, spatial stereo effects, microphone input, microphone echo function, input amplifier, 4-band stereo equalizer, audio stereo circuitry, and velocity, pitch bend, and glissando controls. In addition to using the SAM2695 chip, this invention also utilizes more powerful SAM5000 series musical instrument chips such as SAM5704B, SAM5916B, or SAM5716B in specific scenarios or products with higher requirements.

[0161] The MIDI messages mentioned above refer to data information transmitted via serial port using the MIDI (Musical Instrument Digital Interface) protocol. MIDI messages can be used to control parameters such as notes, volume, timbre, and effects. MIDI messages can be divided into: note messages, controller messages, and system messages. Note messages are used to play notes, controller messages are used to control various parameters, and system messages are used to transmit system-level information, such as synchronization, timing, and reset. For example, sending a note MIDI message to the instrument chip 14a in the instrument module 14 generates a musical tone signal. The note message format is: 9n kk vv, where n represents the MIDI channel number 1-16, kk represents the note symbol 0-127, and vv represents the note's velocity or tempo 0-127. Specifically, 9n indicates that the note is played on the nth MIDI channel, kk represents the played note symbol, and vv represents the note's velocity or tempo, i.e., the intensity of the key press.

[0162] When higher output power is required, the microprocessor module 11 controls the Bluetooth module 12 to send Bluetooth audio signals to an external power amplifier with a Bluetooth receiver, emitting higher power music, which can be received and played by Bluetooth headphones or mobile phones.

[0163] The main features of this embodiment are as follows:

[0164] 1. This invention successfully transforms the traditional electronic bayan into a handheld instrument, significantly simplifying the number of buttons, reducing the size of the instrument, enabling the switching of multiple timbres and accompaniments, and allowing simultaneous playing of melodies, accompaniments, and accompaniments generated by body movements. It can also be used for singing, integrating multiple functions into one.

[0165] 2. The customizable functions within this invention are open to external users. By customizing the function mapping table, personalized settings can be achieved for the sound name button 3, function button 4, function button 4a, and voice commands.

[0166] To enable those skilled in the art to better understand the working principle of this invention, the following further describes the procedure steps:

[0167] In this embodiment, the microprocessor module 11 uses an STM32F series ARM processor or a corresponding domestic series. All input and output control and function implementation are performed under the control of the microprocessor. Its working steps are as follows:

[0168] Interface initialization:

[0169] Step 1: Initialize the microprocessor IO input and output interfaces. Set the pins of the tone name key 3, function key 4, function button 4a and multi-position switch 6 to input mode, and set the pins of the control indicator 7 to output mode.

[0170] Step 2: Initialize the AD converter, that is, initialize the AD converter detected by the force sensor 8b;

[0171] Step 3: Initialize the microprocessor communication interface, including the SPI interface of the voice recognition module 9, the IIC interface of the motion detection module 10, the MIDI communication interface of the musical instrument module 14, the serial port for transmitting data to the display screen 17, and the serial port for controlling the Bluetooth module 12.

[0172] Step 4: Extract the default and set functions stored in flash memory and initialize them;

[0173] Signal detection:

[0174] First, let me explain that signal detection is performed to acquire various input signals for subsequent data processing and control.

[0175] Step 5: The microprocessor detects the switching signals of the tone name key 3, function key 4, function button 4a and multi-position switch 6;

[0176] Step 6: The microprocessor detects the force signal from the force sensor 8b via an AD converter;

[0177] Step 7: The microprocessor reads the motion data from the motion detection module 10 via the IIC interface.

[0178] Step 8: The microprocessor reads the voice command data from the voice recognition module 9 via the SPI interface.

[0179] Data processing and control:

[0180] Step 9: The microprocessor determines the musical note data of the octave pitch and the dynamic range based on the detected action signals of the note name key 3 and the multi-bit switch 6, combined with the lookup function correspondence table and the dynamic range data detected by the dynamic range sensor 8b. It converts the data into MIDI message code and sends it to the instrument chip 14a in the instrument module 14 through the MIDI interface communication method. This generates musical tone signals and accompaniment signals, and controls the instrument amplifier 14b inside the instrument module 14 to drive the speaker 15 to emit musical tone and accompaniment.

[0181] Step 10: The microprocessor processes the motion data read from the motion detection module 10, determines the type and specific action of the percussion accompaniment based on the height, position, direction, angle, speed and playing technique, converts it into the corresponding MIDI message code, and sends it to the instrument chip 14a in the instrument module 14 through the MIDI interface communication method, generating a percussion sound signal and sending it to the instrument amplifier 14b inside the instrument module 14 to drive the speaker 15 to emit a sound.

[0182] Step 11: The microprocessor converts the detected actions of the operation function key 4 and function button 4a into MIDI message codes, and sends them to the instrument chip 14a in the instrument module 14 via the MIDI interface communication method to enable and operate the relevant functions.

[0183] Step 12: The microprocessor, based on the detected button action of the multi-position switch 6, controls the display screen 17 via the serial port to display and execute the functions and related operations set by the multi-position switch 6.

[0184] Step 13: The microprocessor converts the command data received from the voice recognition module 9 into MIDI message codes and sends them to the instrument chip 14a in the instrument module 14 via the MIDI interface communication method for function setting and quick operation;

[0185] Step 14: The microprocessor detects function button 4 and voice recognition commands to disable or enable the input amplifier in the instrument chip 14a, controlling whether to allow the audio signal from the sound sensor 8a to be amplified and output.

[0186] Example 2:

[0187] Please see Figure 9 , Figure 10 and Figure 11 The image shown is a simplified embodiment of a handheld electronic bayanx of the present invention; wherein:

[0188] Please see Figure 9 As shown, Figure 9The diagram shows a simplified external structure of the present invention. The simplified version of the handheld electronic bayan piano of the present invention simplifies the buttons of the left-hand piano 1a and the right-hand piano 1b of the main body 1 of the bayan piano. After simplification, there are 14 note name buttons 3 and 5 function buttons 4. Apart from the simplification of the number of buttons and the reduction of the piano size to: length 26mm, width 70mm, thickness 50mm, other structures remain unchanged.

[0189] The simplified left-hand piano 1a and right-hand piano 1b have the following surface features: note name buttons 3, function buttons 4, indicator lights 7, sound sensor 8a, hand strap 1c, screw 1e, nut 1f, speaker 15, and charging port 16. The left-hand piano 1a and right-hand piano 1b are respectively provided with hand straps 1c on their inner sides. The head of the hand strap 1c has a screw 1e that is inserted into the body of the bayan piano 1 through a strip hole on the upper part of the inner side and fixed inside. The screw 1e is equipped with a nut 1f, which protrudes from a hole on the top of the piano body and is used to manually adjust the tightness of the hand strap 1c so that the hand can be fixed on the inner side of the left-hand piano 1a and right-hand piano 1b to ensure a stable grip for playing.

[0190] The front panel has note name buttons 3 and function buttons 4. The note name buttons 3 include 14 note name buttons, which are arranged in three staggered columns on the upper part of the panel. The first and second columns on the left each have 5 note name buttons, and the third column has 4 note name buttons. The function buttons 4 include 5 buttons located on the lower part of the panel and below the note name buttons 3.

[0191] Among the five buttons on the left-hand piano 1a function button 4, the two buttons on the right are "accompaniment selection +" and "accompaniment selection -", the two buttons on the left are "pitch shift +" and "pitch shift -", and the first button on the left of function button 4 is a switch button for "traditional bass" or "free bass". It can also be set using a multi-position switch 6 in conjunction with the display screen 17. Pressing and holding this button will turn the device on or off.

[0192] Among the five buttons on the right-hand piano 1b function button 4, the two buttons on the right, one above the other, are "Tone Selection +" and "Tone Selection -", the two buttons on the left, one above the other, are "Pitch Shift +" and "Pitch Shift -", the first button on the left double-clicks to "Volume +", single-clicks to "Volume -", and long-pressing the button turns the piano on or off.

[0193] Please see Figure 10 The diagram shows the simplified arrangement of the note name buttons in the traditional bass position according to the present invention. In the simplified bayan harp body 1, the left hand 1a is the bass accompaniment part, and the right hand 1b is the main melody part. In the diagram, the note name buttons 3 of the left hand 1a are arranged according to the bass note names on the left side, and the tuning buttons 4 of the right hand 1b are arranged according to the main melody note names on the right side.

[0194] The note name buttons 3 on the left-hand piano 1a are arranged according to the "traditional bass" position names. The 14 buttons on the note name buttons 3 on the left-hand piano 1a are divided into 3 columns. The first column on the left is the basic bass, with 5 buttons and the note names are "A, D, G, C, F". The second column is the major triad, with 5 buttons and the note names are "A, D, G, C, F". The third column is the minor triad, with 4 buttons and the note names are "D, G, C, F".

[0195] Among them, the 14 keys of the right-hand piano 1b are divided into 3 columns. The first column on the left has 5 keys with the key names "#G, B, D, F, bA". The second column on the left has 5 keys with the key names "G, bB, #C, E, G". The third column on the left has 4 keys with the key names "A, C, bE, #F".

[0196] Please see Figure 11 As shown, Figure 11 This is a simplified diagram of the free bass position arrangement of the note name buttons of the present invention. The function buttons 4 of the simplified left-hand piano 1a also have a switch button for "traditional bass" or "free bass" type, which can be switched between "traditional bass" and "free bass" as needed. In the figure, the left side is the note name buttons 3 of the left-hand piano 1a arranged according to the "free bass" note name, and the right side is the note name buttons 3 of the right-hand piano 1b arranged according to the main melody note name.

[0197] The note name buttons 3 on the left-hand piano 1a are arranged according to the "free bass" note name position. The 14 buttons on the left-hand piano 1a 3 are arranged in 3 columns from bottom to top. The first column on the left has 5 buttons with note names "#G, B, D, F, #A", the second column on the left has 5 buttons with note names "A, C, bE, #F, A", and the third column on the left has 4 buttons with note names "bB, #C, E, G".

[0198] Among them, the arrangement of the note name buttons 3 on the right-hand piano 1b is similar to... Figure 10 Same as above, no change. There are 14 buttons in 3 columns. The first column on the left has 5 buttons with the note names "#G, B, D, F, bA". The second column on the left has 5 buttons with the note names "G, bB, #C, E, G". The third column on the left has 4 buttons with the note names "A, C, bE, #F".

[0199] The simplified version of the bayan piano body 1 also has the same arrangement of note name buttons as the B series and C series bayan pianos, as well as the custom setting function for note name buttons 3 and function buttons 4.

[0200] The note name buttons 3 and function buttons 4 can also use membrane touch buttons, which are fixed to the panel surface of the bayan piano body 1;

[0201] Indicator light 7 is located on the upper inner side of the panel of the bayan piano body 1, charging port 16 is located on the lower outer side of the bayan piano body 1, sound sensor 8a is located on the upper outer side of the bayan piano body 1, and hand straps 1c are provided on the inner sides of the left hand piano 1a and the right hand piano 1b. The head of the hand strap 1c has a screw 1e that is inserted into the inside of the bayan piano body 1 through the strip hole on the upper inner side and fixed. The screw 1e is equipped with a nut 1f, which protrudes from the hole on the top of the piano body and is used to adjust the tightness of the hand strap 1c. When playing, the hand strap 1c fixes the hand on the inner side of the left hand piano 1a and the right hand piano 1b so that it can be held firmly for playing.

[0202] The speaker 15 is fixed to the back of the front panel of the bayan piano body 1 and inside the speaker hole. The speaker hole of the panel is provided with a mesh.

[0203] Embodiment 2 of the present invention is basically the same as Embodiment 1 in terms of external structure, except that Embodiment 2 is smaller in size and the number of buttons is simplified compared to Embodiment 1, making it more concise. The structure of its back and sides is similar to that of Embodiment 1. Please refer to [link / reference]. Figure 4 and Figure 5 As shown, see the description in Example 1 for details.

[0204] For a simplified version of the circuit and module connection principles, please refer to [link / reference]. Figure 8 The number of note name buttons 3 has been reduced from 26 to 14, and the number of function buttons 4 has been reduced from 6 to 5. Except for the reduction in the number of note name buttons 3 and function buttons 4, the connection principles and working steps of other circuits and modules are the same as in Embodiment 1. Please refer to the detailed description in Embodiment 1.

[0205] To enable those skilled in the art to gain a deeper understanding of the embodiments of the main body 1 shell of the present invention, further descriptions are provided below: Figure 12 , Figure 13 and Figure 14 Three shell design drawings of the present invention are shown; the drawings show three shell 2 designs, which are similar in overall structure but slightly different;

[0206] Since the left-hand piano 1a and the right-hand piano 1b have basically the same structure, the diagrams are all based on the shell 2 of the right-hand piano 1b as an example. The left diagram shows the front side perspective of the shell 2, and the right diagram shows the back side perspective of the shell 2.

[0207] Figure 12 , Figure 13 and Figure 14 These three models have basically the same structure. Here, we will introduce the common parts together, including:

[0208] The surface of the right-hand piano 1b's housing 2 in the left figure includes note name buttons 3, function buttons 4, indicator lights 7, and a speaker 15. The side also has a sound sensor 8a, a microphone jack 16a, and a charging port 16. The indicator lights 7 are located on the upper side of the housing 2's front panel, while the note name buttons 3 and function buttons 4 are located in the middle or upper-middle part of the front panel. The sound sensor 8a is located on the upper part of the side of the housing 2, the microphone jack 16a is located below the sound sensor 8a, and the charging port 16 is located on the lower part of the side of the housing 2.

[0209] The back side surface of the housing 2 of the right-hand piano 1b in the right figure includes a display screen 17, a thumb rest 6a, a multi-position switch 6, and a function button 4a;

[0210] The following describes the slightly different layouts of the components in each housing type 2:

[0211] Please refer to Figure 12 , Figure 12 This is a schematic diagram of the three-row button single speaker housing design of the present invention. In the figure, the front panel of the housing 2 is provided with a three-row button and a single speaker structure. The speaker 15 is located at the lower part of the housing 2. The dimensions of the housing 2 are: length 26mm, width 70mm, and thickness 50mm.

[0212] The display screen 17 is located on the upper part of the housing 2 on the back side bottom plate. Below the display screen 17 is a thumb rest 6a, below the thumb rest 6a is a multi-position switch 6, and below the multi-position switch 6 is a function button 4a.

[0213] Please refer to Figure 13 , Figure 13 This is a schematic diagram of the three-row button dual-speaker housing design of the present invention. In the figure, the front panel of the housing 2 is provided with three rows of buttons and a dual-speaker structure. The dual speakers are located at the upper and lower parts of the housing 2, respectively. The dimensions of the housing 2 are: length 33mm, width 70mm, and thickness 50mm.

[0214] The display screen 17 is located on the upper middle part of the back side bottom plate of the housing 2. A thumb rest 6a is provided below the display screen 17, a multi-position switch 6 is provided below the thumb rest 6a, and a function button 4a is provided below the multi-position switch 6.

[0215] Please refer to Figure 14 , Figure 14 This is a schematic diagram of the two-row button single speaker housing design of the present invention. This is a compact housing of the present invention, which is small in size and easy to carry. The number of tone name buttons 3, function buttons 4 and function buttons 4a is also the fewest among the three models, making it more suitable for children to use. In the figure, the front panel of the housing 2 is provided with two rows of buttons and a single speaker structure. The speaker is located at the bottom of the housing 2. The dimensions of the housing 2 are: length 25mm, width 60mm, and thickness 40mm.

[0216] The thumb rest 6a is located on the upper part of the back side bottom plate of the housing 2. A multi-position switch 6 is located below the thumb rest 6a. A function button 4a and a display screen 17 are located below the multi-position switch 6.

[0217] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been described above with reference to preferred embodiments, it is not intended to limit the present invention. Any equivalent changes or modifications made to the methods and technical solutions of the present invention shall fall within the scope of the methods and technical solutions of the present invention.

Claims

1. A handheld electronic bayan, characterized in that: include: The bayan is composed of the following components: main body (1), left-hand instrument (1a), right-hand instrument (1b), shell (2), wrist strap (1c), buckle (1d), screw (1e), nut (1f), note name key (3), function key (4), function button (4a), key circuit board (5a), control circuit board (5b), multi-position switch (6), thumb rest (6a), indicator light (7), sound sensor (8a), velocity sensor (8b), voice microphone (8c), voice recognition module (9), motion detection module (10), microprocessor module (11), Bluetooth module (12), power module (13), instrument module (14), instrument chip (14a), instrument amplifier (14b), speaker (15), charging port (16), microphone socket (16a), magnet (16b), display screen (17), and WIFI module (18). The main body (1) of the bayan is a handheld electronic bayan consisting of a split structure of a left-hand instrument (1a) and a right-hand instrument (1b). The main body (1) of the bayan includes a left-hand instrument (1a) and a right-hand instrument (1b). The surfaces of the left-hand instrument (1a) and the right-hand instrument (1b) include note name buttons (3), function buttons (4), indicator lights (7), sound sensors (8a), wrist straps (1c), buckles (1d), speakers (15) and charging ports (16). The front panel includes note name buttons (3), function buttons (4) and indicator lights (7); the outer side has a sound sensor (8a) and a charging port (16); the inner side has a wrist strap (1c) and a buckle (1d); the speaker (15) is fixed in the speaker hole on the back of the front panel of the bayan body (1). The note name buttons (3) are arranged in alternating rows on the upper part of the panel, and the function buttons (4) are located on the lower part of the panel below the note name buttons (3). The left-hand piano (1a) is for bass accompaniment, and the right-hand piano (1b) is for the main melody. The note name buttons (3) of the left-hand piano (1a) are arranged according to the note name rules of "traditional bass", and the note name buttons (3) of the right-hand piano (1b) are arranged according to the note name rules of the main melody. The left-hand piano (1a) has a function key (4) with a switch between "traditional bass" and "free bass" types. It can switch between "traditional bass" and "free bass" as needed. When switched to "free bass", the note name key (3) is arranged according to the note name rules of "free bass". The bayan piano body (1) has a shell (2) for both the left hand (1a) and the right hand (1b). The shell (2) is the outer shell of the left hand (1a) and the right hand (1b). The back of the shell (2) has a function button (4a), a multi-position switch (6), a display screen (17) and a thumb rest (6a). The housing (2) is equipped with a button circuit board (5a), a control circuit board (5b) and a speaker (15); the button circuit board (5a) is installed and fixed inside the panel of the housing (2), and the control circuit board (5b) is installed below the button circuit board (5a); The circuit and module components of the left-hand piano (1a) and right-hand piano (1b) mainly include a microprocessor module (11), an instrument module (14), a Bluetooth module (12), a motion detection module (10), a voice recognition module (9), a display screen (17), note name buttons (3), function buttons (4), function buttons (4a), a multi-position switch (6), a sound sensor (8a), a velocity sensor (8b), a voice microphone (8c), a microphone socket (16a), a power module (13), a charging port (16), and a WIFI module (18); among them, the microprocessor module (11) is connected to the note name buttons (3a, 4a, 5a, 6a, 7a, 8b, 8c, 8a, 9a, 10a, 11a, 12a, 13a, 14a, 15a, 16a, 17a, 18a, 19a, 10a, 19a, 11a, 19 ... The system includes a function key (4), a function button (4a), a multi-position switch (6), a force sensor (8b), a voice recognition module (9), a motion detection module (10), a Bluetooth module (12), a musical instrument module (14), a charging port (16), a display screen (17), and a WIFI module (18); wherein, the musical instrument module (14) includes a musical instrument chip (14a) and a musical instrument amplifier (14b), the musical instrument chip (14a) is connected to the musical instrument amplifier (14b), the Bluetooth module (12), the sound sensor (8a), and the microphone socket (16a); the voice recognition module (9) is connected to the voice microphone (8c); Among them, the IO input terminal of the microprocessor module (11) receives the switching signals of the note name key (3), function key (4), function button (4a) and multi-position switch (6), the force sensor (8b) sends the converted force signal to the microprocessor module (11), the motion detection module (10) transmits motion data to the microprocessor module (11) through the IIC interface, the microprocessor module (11) sends data to the instrument module (14) through the MIDI communication interface, the instrument module (14) outputs musical sound signal to the speaker (15) to emit musical sound, the instrument module (14) outputs musical sound signal to the audio input terminal of the Bluetooth module (12), and the Bluetooth module (12) sends Bluetooth audio signal to the external speaker; The sound sensor (8a) transmits the electrical signal of the voice command to the voice recognition module (9). The voice command data recognized by the voice recognition module (9) is transmitted to the microprocessor module (11) through the SPI interface. The microprocessor module (11) outputs the control indicator (7). The microprocessor module (11) sends the display data to the display screen (17) through the serial port. The function key (4) outputs a switch signal to the microprocessor module (11) to control the instrument module (14) to execute the operation corresponding to the function key (4); The microprocessor module (11) of the left-hand piano (1a) and the right-hand piano (1b) respectively stores their own function correspondence tables. The function correspondence table is used to define the relationship between the note name key (3), function key (4), function button (4a) and voice command and their functions. The microprocessor controls the instrument module (14) to emit musical signals or perform related operations according to its corresponding function. In addition to normal use, the function correspondence table is also open to the outside world. Users can modify the function correspondence table by cooperating with the multi-position switch (6) and the display screen (17) to change its corresponding function options, thereby realizing the personalized customization settings of the handheld electronic bayan. The buttons on the left hand (1a) and right hand (1b) of the simplified version of the bayan piano body (1) have been simplified, with 14 note name buttons (3) and 5 function buttons (4); The simplified bayan (1) has a left-hand (1a) for bass accompaniment and a right-hand (1b) for melody. The 14 keys of the note name buttons (3) on the left-hand (1a) are arranged according to the bass note names, and the 14 keys of the note name buttons (3) on the right-hand (1b) are arranged according to the melody note names. The function buttons (4) on the left-hand (1a) have a switch for "traditional bass" or "free bass". A variety of housings for the main body (1) are provided, including a housing with the main body (1) having a three-row button single speaker, a housing with the main body (1) having a three-row button dual speaker, and a housing with the main body (1) having a two-row button single speaker.

2. A handheld electronic bayanthometer according to claim 1, characterized in that... The note name buttons (3) and function buttons (4) on the front panel of the bayan piano body (1) are mounted on the internal button circuit board (5a). The button heads protrude from the button holes on the panel. Alternatively, a membrane touch button can be used instead. The membrane touch button is fixed to the panel surface of the bayan piano body (1). The indicator light (7) is located in the indicator light hole on the upper inner side of the panel of the bayan piano body (1). The sound sensor (8a) is located on the upper outer side of the bayan piano body (1). The charging port (16) is located on the lower outer side of the bayan piano body (1). The inner sides of the left-hand piano (1a) and the right-hand piano (1b) are respectively provided with hand straps (1c). The hand straps (1c) have buckles (1d) for adjusting the tightness of the hand straps. When playing, the hand straps (1c) fix the hands on the inner sides of the left-hand piano (1a) and the right-hand piano (1b) so as to hold them firmly and play. The loudspeaker (15) is fixed to the back of the front panel and the loudspeaker hole of the bayan piano body (1), and the loudspeaker hole of the panel is provided with a mesh. The left-hand piano (1a) has 6 function buttons (4). The two buttons on the right are "accompaniment selection +" and "accompaniment selection -", and the two buttons on the left are "pitch change +" and "pitch change -". Pressing and holding the first button on the left turns the piano on or off. The second button on the left is a switch for "traditional bass" or "free bass". It also provides the option to use a multi-position switch (6) in conjunction with the display screen (17) to set the piano. The right-hand piano (1b) has 6 function buttons (4). The two buttons on the right are "Tone Selection +" and "Tone Selection -", the two buttons on the left are "Pitch Change +" and "Pitch Change -", the first button on the left is "Volume +", the second button is "Volume -", and pressing and holding the first button on the left turns the piano on or off.

3. A handheld electronic bayanthometer according to claim 1 or 2, characterized in that... The note name buttons (3) of the left-hand piano (1a) are arranged according to the "traditional bass" type pattern. The first column on the left is the basic bass, with note names "E, A, D, G, C, F, Bb". The second column is the major triad, with note names "E, A, D, G, C, F, Bb". The third column is the minor triad, with note names "A, D, G, C, F, Bb". The fourth column is the dominant seventh chord, with note names "A, D, G, C, F, Bb". The 26 buttons on the right-hand piano (1b) (3) are arranged according to the note names of the main melody. The first column on the left has 7 buttons with note names "F, G#, B, D, F, G#, B", the second column on the left has 7 buttons with note names "E, G, Bb, C#, E, G, Bb", the third column on the left has 6 buttons with note names "F#, A, C, Eb, F#, A", and the fourth column on the left has 6 buttons with note names "F, G#, B, D, F, G#". The note name buttons (3) of the left-hand piano (1a) are arranged in the pattern of "free bass" from bottom to top. There are 7 buttons in the first column on the left, with note names "F, #G, B, D, F, #G, B", 7 buttons in the second column on the left, with note names "#F, A, C, bE, #F, A, C", 6 buttons in the third column on the left, with note names "G, bB, #C, E, G, bB", and 6 buttons in the fourth column on the left, with note names "#G, B, D, F, #G, B". The arrangement of the note name buttons (3) above follows the default pattern of the traditional bayan piano B series, but the number of buttons is significantly reduced compared with the existing technology. At the same time, the note name arrangement of the C series buttons is also provided. The C series or B series can be selected by using the multi-position switch (6) in conjunction with the display screen (17). In addition, each button of the note name buttons (3) is open to the outside, allowing users to customize the note name of each button. The function buttons (4) also support open settings, and users can customize their functions according to their needs.

4. A handheld electronic bayanthometer according to claim 1, characterized in that... The display screen (17) on the back of the housing (2) is located at the top of the housing (2). Below the display screen (17) is a thumb rest (6a), below the thumb rest (6a) is a multi-position switch (6), and below the multi-position switch (6) is a function button (4a). The multi-position switch (6) is used for switching octaves or as an operation switch in conjunction with the display screen (17) during function settings. The multi-position switch (6) is a 5-position switch, using a five-way switch, divided into 4 contacts (up, down, left, right) and a middle contact, for a total of 5 contacts. It is divided into two operation modes: step octave or fixed octave. The two operation modes can be switched by operating the touch screen. Step-Octave Mode: The up button raises the octave by one octave with each press; the down button lowers the octave by one octave with each press. Pressing the up and middle buttons simultaneously raises the octave by two octaves with each press; pressing the down and middle buttons simultaneously lowers the octave by two octaves with each press. Alternatively, the left button raises the octave by two octaves with each press, and the right button lowers the octave by two octaves with each press. The middle button resets the octave; pressing the middle button alone resets the octave to the original default octave. The characteristic of step-octave mode is that each button press maintains the currently selected octave, and pressing the middle button resets the octave to the original default octave. The control range of step-octave mode is 9 octaves. Fixed octave mode: Up button is octave 1, when pressed it is octave 1; down button is octave -1, when pressed it is octave -1; pressing the up button and the middle button simultaneously is octave 2, when pressed it is octave 2; pressing the down button and the middle button simultaneously is octave -2, when pressed it is octave -2; or left button is octave 2, when pressed it is octave 2; right button is octave -2, when pressed it is octave -2. There are 4 options in total. Releasing the buttons restores the initial default octave. The characteristic of fixed octave mode is that pressing the buttons is effective, and releasing the buttons returns to the initial default octave. The control range of fixed octave mode is 5 octaves. The multi-position switch (6) also works in conjunction with the display screen (17) to select between "traditional bass" and "free bass" options; Function buttons (4a) are shortcut buttons for directly executing functions. In addition to the default functions, the functions of each button (4a) are open to the outside and can be customized as shortcut function buttons. The display screen (17) is a color LCD screen that uses serial communication.

5. A handheld electronic bayanthometer according to claim 1, characterized in that... The key circuit board (5a) is equipped with pitch name keys (3), function keys (4), sound sensors (8a), force sensors (8b) and indicator lights (7). The pitch name keys (3) are arranged alternately on the upper part of the key circuit board (5a), and the function keys (4) are installed on the lower part of the key circuit board (5a) below the pitch name keys (3). The heads of the pitch name keys (3) and the function keys (4) protrude from the key hole on the panel. The indicator lights (7) are installed on the inner side of the upper part of the key circuit board (5a). The force sensors (8b) include 4 sensors, which are installed at the 4 corners on the back of the key circuit board (5a) to sense the force transmitted by pressing the pitch name keys (3). At least 2 sensors are used. Below the button circuit board (5a) is a control circuit board (5b), which integrates a sound sensor (8a), a voice microphone (8c), a voice recognition module (9), a motion detection module (10), a microprocessor module (11), a Bluetooth module (12), a musical instrument module (14), a musical instrument chip (14a), a musical instrument amplifier (14b), a charging port (16), a microphone socket (16a), and a WIFI module (18). The sound sensor (8a), microphone socket (16a) and charging port (16) are located on the side of the control circuit board (5b), with the sound sensor (8a) on top and the charging port (16) on the bottom. The microphone socket (16a) is located in the middle between the sound sensor (8a) and the charging port (16). The voice microphone (8c) is located in the middle of the upper part of the control circuit board (5b), and the speaker (15) is located below the control circuit board (5b).

6. A handheld electronic bayanthus according to claims 1-5, characterized in that... The pins of the microprocessor module (11) that are connected to external circuits mainly include USART1_TX, USART1_RX, USART2_TX, USART3_TX, USART3_RX, UART4_TX, UART4_RX, CH_PD, SCL, SDA, INT, ADC_A_IN, P_SD, Keys-3, Keys-4, Keys-4a, Keys-6 and LED_OUT; The USART1_TX terminal of the microprocessor module (11) is connected to the RX terminal of the charging port (16), and the USART1_RX terminal is connected to the TX terminal of the charging port (16). The USART1_TX terminal of the microprocessor module (11) is connected to the RXD terminal of the WIFI module (18) through connector JB1, the USART1_RX terminal of the microprocessor module (11) is connected to the TXD terminal of the WIFI module (18) through connector JB2, and the PD_OUT terminal of the microprocessor module (11) is connected to the CH_PD terminal of the WIFI module (18). The USART2_TX transmitter of the microprocessor module (11) is connected to the MIDIIN input of the instrument chip (14a) in the instrument module (14). The MIDI IN of the instrument chip (14a) is connected to a pull-up resistor R34, and the other end of the pull-up resistor R34 is connected to the positive power supply. The left channel audio output AUDIO_L of the instrument chip (14a) is connected to the input IN_L of the instrument amplifier (14b) and the input IN_L of the Bluetooth module (12). The right channel audio output AUDIO_R of the instrument chip (14a) is connected to the input IN_R of the instrument amplifier (14b) and the input IN_R of the Bluetooth module (12). The P_SD output of the microprocessor module (11) is connected to the enable SD of the instrument amplifier (14b) to control the instrument amplifier (14b) to be enabled or disabled. The USART3_TX and USART3_RX of the microprocessor module (11) are serial communication interfaces for receiving data sent by the speech recognition module (9). The USART3_TX of the microprocessor module (11) is connected to the UART2_RX end of the speech recognition module (9), and the USART3_RX of the microprocessor module (11) is connected to the UART2_TX end of the speech recognition module (9). The UART4 port of the microprocessor module (11) sends a serial port command to the Bluetooth module (12) to control its enable or disable to save power; the UART4_TX terminal of the microprocessor module (11) is connected to the RX terminal of the Bluetooth module (12), and the UART4_RX terminal of the microprocessor module (11) is connected to the TX terminal of the Bluetooth module (12). The SCL and SDA terminals of the microprocessor module (11) are communication interfaces for receiving data sent by the motion detection module (10), and the INT terminal is the interrupt input terminal for responding to the interrupt request signal sent by the motion detection module (10). The SCL terminal of the microprocessor module (11) is connected to the MPU-SCL terminal of the motion detection module (10), the SDA terminal of the microprocessor module (11) is connected to the MPU-SDA terminal of the motion detection module (10), and the INT terminal of the microprocessor module (11) is connected to the MPU-INT terminal of the motion detection module (10). The ADC_A_IN input terminal of the AD converter of the microprocessor module (11) is connected to the positive BO terminal of the output terminal of the force sensor (8b), and the analog ground wire AG terminal is connected to the negative B_AG terminal of the force sensor (8b). In the circuit of the force sensor (8b), four sensors B1, B2, B3, and B4 are connected in series with resistor R3. These four sensors are respectively installed at the four corners of the button circuit board (5a), converting the pressure generated by pressing the button into a voltage signal. The four sensors B1, B2, B3, and B4 collectively sense the pressure applied to each button. The series connection allows the signals from the four sensors to be superimposed as the sum of four signal voltages. The positive and negative terminals of the sensor signals are connected in parallel with resistor R2, capacitor C2, and diode D2. The positive terminal of the sensor signal is connected to the negative terminal of the diode. The negative terminal of the sensor is connected to the positive terminal of the diode to remove the negative signal generated when the button is released. The positive terminal of the sensor signal is connected to the input terminal of the resistor R4 and the op-amp OPA1. The output terminal BO of the op-amp OPA1 is connected to the ADC_A_IN of the AD converter of the microprocessor module (11). The negative terminal of the signal serves as the ground terminal B_AG of the output signal. The B_AG terminal is connected to the analog ground terminal AG of the AD converter of the microprocessor module (11). The circuit of the force sensor (8b) is suitable for resistance strain gauge or piezoelectric ceramic sensor. If the amplitude of the signal sensed by the sensor is high enough, the op-amp OPA1 can be omitted. The 26 IO inputs of Keys-3 of the microprocessor module (11) are connected to each key of the pitch name key (3); the 6 IO inputs of Keys-4 of the microprocessor module (11) are connected to each key of the function key (4); the 16 IO inputs of Keys-4a of the microprocessor module (11) are connected to each button of the function button (4a); and the 5 IO inputs of Keys-6 of the microprocessor module (11) are connected to each switch of the multi-position switch (6). The LED_OUT output terminal of the microprocessor module (11) is connected to resistor R32. The other end of resistor R32 is connected to the positive terminal of the LED indicator (7). The negative terminal of the LED indicator (7) is connected to ground GND.

7. A handheld electronic bayanthus according to claims 1-6, characterized in that... The microprocessor module (11) controls the instrument module (14) via a MIDI interface. The instrument chip (14a) in the instrument module (14) has a built-in input amplifier and audio stereo circuitry. The microprocessor module (11) can send MIDI commands to the instrument chip (14a) as needed to control the opening or closing of the input amplifier and audio stereo circuitry. During the performance, the microprocessor module (11) detects the signals of each key of the note name button (3) and each button of the multi-position switch (6) in real time. Each key of the note name button (3) corresponds to a note name. The microprocessor in the microprocessor module (11) determines the current octave pitch based on the detected note name of the note name button (3) and the signal of the multi-position switch (6). At the same time, the microprocessor module (11) controls the AD converter to convert the electrical signal of the pressure of the pressed key sensed by the force sensor (8b) into a digital quantity. The module (11) synthesizes the current note name, octave pitch and key velocity value of the current note name key (3) into a MIDI message format and sends the MIDI message data to the instrument chip (14a) in the instrument module (14) through the MIDI interface, so that it generates a musical tone signal with the current octave pitch and velocity control, and outputs it to the instrument amplifier (14b) in the instrument module (14) to drive the speaker (15) to emit musical tone. The performer plays the main melody and accompaniment through the right hand piano (1a) and left hand piano (1b); The microprocessor module (11) sends MIDI messages to the instrument chip (14a) to control the built-in input amplifier. The sound sensor (8a) converts the singing sound into an audio signal and sends it to the built-in input amplifier of the instrument chip (14a). Through the built-in stereo audio circuit of the instrument chip (14a), the audio signal of the singing is output to the instrument amplifier (14b) in the instrument module (14), which drives the speaker (15) to emit the singing sound, thus realizing the karaoke effect. The microprocessor processes the motion data read from the motion detection module (10), determines the type and specific action of the percussion accompaniment based on the height, position, direction, angle, speed and playing technique of the motion, converts it into the corresponding MIDI message code, and sends it to the instrument chip (14a) in the instrument module (14) through the MIDI interface communication method, generating percussion sound signals and sending them to the instrument amplifier (14b) inside the instrument module (14) to drive the speaker (15) to emit musical sounds; The microprocessor module (11) controls the Bluetooth module (12) to send Bluetooth audio signals to an external power amplifier with a Bluetooth receiver, to emit higher power music, and to receive and play the music with Bluetooth headphones or mobile phones.

8. A handheld electronic bayanthus according to claims 1-7, characterized in that... The function button (4) outputs a switch signal to the microprocessor module (11) to control the instrument module (14) to perform the operation corresponding to the function button (4). The function button (4) outputs a switch signal to the microprocessor module (11). The IO input terminal of the microprocessor in the microprocessor module (11) detects the signal of the function button (4) in real time, determines the function corresponding to the current button, and controls the instrument chip (14a) in the instrument module (14) to perform the corresponding operation through the MIDI interface communication method, including timbre selection, accompaniment selection, pitch shifting, volume adjustment, free bass conversion, power on or power off operation; Since the number of function buttons (4) is limited, the number of functions that can be directly operated during the performance is limited. Therefore, the function buttons (4) are opened up to customize the functions. Users can customize the operation functions that are most suitable for their use as shortcut buttons for direct operation according to their actual needs. They can also customize the functions that need to be directly operated to the function buttons (4a) on the back of the housing (2), so that the function buttons (4) and function buttons (4a) can be used in a customized way. When needed, the function buttons (4) can also be customized as the note names of the note name buttons (3) to increase the number of note name buttons (3). Conversely, some of the buttons of the note name buttons (3) can also be customized as the functions of the function buttons (4). In addition to the default function, each function button (4a) has its function exposed. The function of each button can be redefined as needed, and the buttons of function button (4a) can be customized into convenient shortcut function buttons. Further, voice commands are used to execute direct operation commands. The voice microphone (8c) converts the received voice commands into electrical signals and sends them to the voice recognition module (9) for voice recognition. The recognized command result data is transmitted to the microprocessor module (11) via SPI interface communication. The microprocessor module (11) controls the instrument chip (14a) in the instrument module (14) to execute corresponding voice operation commands such as accompaniment, timbre, pitch shifting, volume, free bass switching, power on or power off, based on the received voice commands via MIDI interface communication, making the operation more convenient and faster.

9. A handheld electronic bayanthometer according to claim 1, characterized in that... The data of the function correspondence table is stored in the microprocessor module (11). When it is necessary to customize the function of the note name button (3), it is done by operating the button of the multi-position switch (6) and the display screen (17). Select the "name item" of the note name button (3) in the function correspondence table as the desired note name, and the note name of the note name button (3) will be changed. The data of the changed function correspondence table is saved in the flash inside the microprocessor of the microprocessor module (11). When playing, when the key in the note name key (3) is pressed, the microprocessor in the microprocessor module (11) extracts the note name or function name corresponding to the key in the function correspondence table, as well as the current velocity data and the state of the multi-bit switch (6), and converts them into the corresponding MIDI message code, and sends it to the instrument chip (14a) in the instrument module (14) through the MIDI interface communication method, and controls the instrument chip (14a) to generate musical sound signals; By setting the note name buttons (3) in the function correspondence table in an open manner, the note names of the buttons can be redefined, the arrangement order of the note names of the buttons can be changed, and the note name buttons (3) can be set to the arrangement rules and fingerings of other instruments. The system has the arrangement rules and fingerings of the default note name buttons (3) of various instruments. The buttons of the multi-position switch (6) and the display screen (17) can be selected and switched, eliminating the need to set each button individually. When it is necessary to customize the function of the function key (4), it is done by operating the button of the multi-position switch (6) in conjunction with the display screen (17), which is similar to the open operation principle of the tone name key (3). When a function key (4) is pressed, the microprocessor extracts the function corresponding to the pressed function key (4) from the function correspondence table, converts it into a MIDI message code, and sends it to the instrument chip (14a) in the instrument module (14) through the MIDI interface communication method to execute the corresponding function. The voice command is used to directly operate the correspondence in the function correspondence table. The voice command received by the voice microphone (8c) is converted into an electrical signal and sent to the voice recognition module (9) for voice recognition. The recognized command result data is transmitted to the microprocessor module (11) via SPI interface communication. The microprocessor module (11) selects the function corresponding to the tone name key (3), function key (4) or function button (4a) according to the received voice command, and displays it on the display screen (17) to confirm the response and verify the permission to avoid operation errors. Then, the correspondence in the function correspondence table is directly modified.

10. A handheld electronic bayanthometer according to claim 1, characterized in that... The surfaces of the simplified left-hand piano (1a) and right-hand piano (1b) include note name buttons (3), function buttons (4), indicator lights (7), sound sensors (8a), wrist straps (1c), screws (1e), nuts (1f), speakers (15) and charging ports (16); The front panel has a note name button (3) and a function button (4). The note name button (3) includes 14 buttons, which are arranged in three staggered columns on the upper part of the panel. The first and second columns on the left each have 5 buttons, and the third column has 4 buttons. The function button (4) includes 5 buttons located on the lower part of the panel and below the note name button (3). The inner sides of the left-hand piano (1a) and the right-hand piano (1b) are respectively provided with hand straps (1c). The head of the hand strap (1c) has a screw (1e) that is inserted into the body of the bayan piano (1) through the strip hole at the top of the inner side and fixed inside. The screw (1e) has a nut (1f) that protrudes from the hole at the top of the piano body and is used to adjust the tightness of the hand strap (1c). When playing, the hand strap (1c) fixes the hand on the inner side of the left-hand piano (1a) and the right-hand piano (1b) so that the grip is reliable and the playing is more stable. The note name buttons (3) of the left-hand piano (1a) are arranged according to the position of the "traditional bass" note name. The 14 buttons of the note name buttons (3) of the left-hand piano (1a) are in 3 columns. The first column on the left is the basic bass, with a total of 5 buttons and the note names are "A, D, G, C, F". The second column is the major triad, with a total of 5 buttons and the note names are "A, D, G, C, F". The third column is the minor triad, with a total of 4 buttons and the note names are "D, G, C, F". The right-hand piano (1b) has 14 buttons (3) in 3 columns. The first column on the left has 5 buttons with the note names "#G, B, D, F, bA", the second column on the left has 5 buttons with the note names "G, bB, #C, E, G", and the third column on the left has 4 buttons with the note names "A, C, bE, #F". The note name buttons (3) of the left-hand piano (1a) are arranged according to the position of the "free bass" note name. The note name buttons (3) of the right-hand piano (1b) are arranged according to the main melody note name. The 14 buttons of the note name buttons (3) of the left-hand piano (1a) are arranged in 3 columns from bottom to top. The first column on the left has 5 buttons with note names "#G, B, D, F, #A". The second column on the left has 5 buttons with note names "A, C, bE, #F, A". The third column on the left has 4 buttons with note names "bB, #C, E, G". The right-hand piano (1b) has 14 keys (3) in 3 columns. The first column on the left has 5 keys with the key names "#G, B, D, F, bA". The second column on the left has 5 keys with the key names "G, bB, #C, E, G". The third column on the left has 4 keys with the key names "A, C, bE, #F".

11. A handheld electronic bayanthometer according to claim 1, characterized in that... The main body (1) is provided with three shells with similar structures but slight differences. The front and side surfaces of the shells (2) include tone name buttons (3), function buttons (4), indicator lights (7), and speakers (15). The sides have sound sensors (8a), microphone sockets (16a), and charging ports (16). The indicator lights (7) are located on the upper side of the front and side panels of the shells (2), the tone name buttons (3) and function buttons (4) are located in the middle or upper middle part of the front and side panels, the sound sensors (8a) are located on the upper part of the side of the shells (2), the microphone sockets (16a) are located below the sound sensors (8a), and the charging ports (16) are located on the lower part of the side of the shells (2). The back side surface of the housing (2) includes a display screen (17), a thumb rest (6a), a multi-position switch (6), and a function button (4a); in: The housing (2) of the three-row button single speaker housing has a three-row button and single speaker structure on the front panel. The speaker 15 is located at the lower part of the housing (2). The dimensions of the housing (2) are: 26mm long, 70mm wide, and 50mm thick. The display screen (17) is located on the back side bottom plate of the housing (2) at the top of the housing (2). There is a thumb rest (6a) below the display screen (17), a multi-position switch (6) below the thumb rest (6a), and a function button (4a) below the multi-position switch (6). The front panel of the housing (2) with three rows of buttons and a dual speaker structure is provided. The dual speakers are located at the top and bottom of the housing (2) respectively. The dimensions of the housing (2) are: length 33mm, width 70mm, and thickness 50mm. The display screen (17) is located on the back side bottom plate of the housing (2) in the upper middle part of the housing (2). A thumb rest (6a) is provided below the display screen (17), a multi-position switch (6) is provided below the thumb rest (6a), and a function button (4a) is provided below the multi-position switch (6). The two-row button single speaker compact housing is small in size and easy to carry. The number of tone name buttons (3), function buttons (4) and function buttons (4a) is also the fewest among the three models. The front panel of the housing (2) is equipped with two rows of buttons and a single speaker structure. The speaker is located at the bottom of the housing (2). The dimensions of the housing (2) are: length 25mm, width 60mm, and thickness 40mm. The thumb rest (6a) is located on the upper part of the back side bottom plate of the housing (2). A multi-position switch (6) is located below the thumb rest (6a). A function button (4a) and a display screen (17) are located below the multi-position switch (6).

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