Control method of electronic guzheng, electronic guzheng and storage medium

Abstract

The application discloses a control method of an electronic guzheng, the electronic guzheng and a storage medium. The control method of the electronic guzheng comprises the following steps: acquiring an analog piezoelectric signal generated by a user playing the electronic guzheng; and performing digital processing on the analog piezoelectric signal to obtain and output target audio information. According to the application, the digitalization of the electronic guzheng can be realized, the original sound emitted by the mechanical vibration of the string is not needed, and the digitalized target audio information can be obtained and output, so that the performance of the electronic guzheng is improved in multiple aspects.

Description

Technical Field

[0001] This application relates to the field of electronic musical instrument technology, and in particular to a control method for an electronic guzheng, an electronic guzheng, and a storage medium. Background Technology

[0002] Current electronic guzheng are based on the traditional guzheng but with the addition of a pickup. This allows them to capture sound during playing and amplify or optimize the sound. However, these electronic guzheng still rely on the original sound produced by the mechanical vibration of the strings. Because they depend on the original sound produced by the mechanical vibration of the strings, it is not convenient to tune the strings on-site to achieve transposition and key changes; and due to material limitations, they do not have good resonance, resulting in poor tone performance. Summary of the Invention

[0003] The main purpose of this application is to provide a control method, an electronic guzheng, and a storage medium for an electronic guzheng, aiming to solve the problems of current electronic guzheng being inconvenient for transposition and pitch change, as well as poor tone performance.

[0004] To achieve the above objectives, this application provides a control method for an electronic guzheng, the control method comprising:

[0005] Acquire the analog piezoelectric signal generated by the user playing the electronic guzheng;

[0006] The analog piezoelectric signal is digitized to obtain and output the target audio information.

[0007] Optionally, the step of acquiring the analog piezoelectric signal generated by the user playing the electronic guzheng includes:

[0008] The analog piezoelectric signal generated independently by each string of the electronic guzheng when the user plucks the strings is acquired using a first-type piezoelectric sensor.

[0009] Optionally, the step of acquiring the analog piezoelectric signal generated by the user playing the electronic guzheng includes:

[0010] The analog piezoelectric signal generated independently by each string of the electronic guzheng when the user plays a glissando is acquired using a second type of piezoelectric sensor.

[0011] Optionally, the step of digitizing the analog piezoelectric signal to obtain and output the target audio information includes:

[0012] The analog piezoelectric signal is rectified using a preset rectifier circuit to obtain an intermediate piezoelectric signal.

[0013] The intermediate piezoelectric signal is converted from digital to digital (A / D) to obtain a digital piezoelectric signal.

[0014] Determine whether the digital piezoelectric signal meets the preset triggering conditions;

[0015] If so, then generate the audio synthesis instructions and user playing information corresponding to the digital piezoelectric signal;

[0016] Audio is synthesized according to the audio synthesis instructions and the user's playing information to obtain and output the target audio information.

[0017] Optionally, the step of determining whether the digital piezoelectric signal meets the preset triggering conditions includes:

[0018] Determine whether the digital piezoelectric signal satisfies the preset masking time trigger condition and voltage threshold trigger condition, respectively;

[0019] Optionally, the step of synthesizing audio based on the audio synthesis instructions and the user playing information to obtain and output the target audio information includes:

[0020] The corresponding pre-stored target audio material is retrieved according to the audio synthesis instruction and the user playing information;

[0021] Audio is synthesized based on preset audio output effects and the target audio material to obtain and output the target audio information.

[0022] Optionally, before the step of synthesizing audio based on a preset audio output effect and the target audio material to obtain and output the target audio information, the method further includes:

[0023] In response to the user's settings, the audio output effect of the electronic guzheng is set, wherein the audio output effect includes one or more of the following: tuning mode, transposition function, and automatic pitch mode.

[0024] Optionally, the step of digitizing the analog piezoelectric signal to obtain and output the target audio information includes:

[0025] The target audio information is subjected to D / A conversion to obtain an analog audio signal;

[0026] The preset audio playback unit is controlled to play the analog audio signal.

[0027] This application also proposes an electronic guzheng, which includes a memory, a processor, and a control program for the electronic guzheng stored in the memory and executable on the processor. When the control program for the electronic guzheng is executed by the processor, it implements the steps of the control method for the electronic guzheng as described above.

[0028] This application also proposes a computer-readable storage medium storing a control program for an electronic guzheng. When the control program for the electronic guzheng is executed by a processor, it implements the steps of the control method for the electronic guzheng as described above.

[0029] The control method, electronic guzheng, and storage medium proposed in this application embodiment acquire analog piezoelectric signals generated by a user playing the electronic guzheng; digitize the analog piezoelectric signals to obtain and output target audio information. Based on this application solution, the acquired analog piezoelectric signals generated by the user's playing can be digitized to obtain and output target audio information without relying on the original sound produced by the mechanical vibration of the strings, thus realizing the digitization of the electronic guzheng. In this way, digital tuning, transposition, and modulation audio effects can be easily achieved during the digitization process; furthermore, it allows the electronic guzheng to overcome material limitations and improve its tonal performance through digitization. In summary, this embodiment can improve the performance of the electronic guzheng in multiple ways. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the functional modules of the terminal equipment to which the control device of the electronic guzheng belongs in this application;

[0031] Figure 2 This is a schematic flowchart of a first exemplary embodiment of the control method for an electronic guzheng according to this application;

[0032] Figure 3 This is a schematic flowchart of a second exemplary embodiment of the control method for an electronic guzheng according to this application;

[0033] Figure 4 This is a schematic flowchart of a third exemplary embodiment of the control method for an electronic guzheng according to this application;

[0034] Figure 5 A schematic diagram showing the second type of piezoelectric sensor setup involved in the control method of the electronic guzheng in this application;

[0035] Figure 6 This is a schematic flowchart of the fourth exemplary embodiment of the control method for the electronic guzheng of this application;

[0036] Figure 7 This is a schematic diagram of the AC analog piezoelectric signal involved in the control method of the electronic guzheng in this application;

[0037] Figure 8 This is a schematic diagram of the rectifier circuit involved in the control method of the electronic guzheng in this application;

[0038] Figure 9 This is a schematic diagram of an ideal DC analog piezoelectric signal involved in the control method of the electronic guzheng in this application;

[0039] Figure 10 This is a schematic diagram of the actual DC analog piezoelectric signal involved in the control method of the electronic guzheng in this application;

[0040] Figure 11 This is a schematic flowchart of the fifth exemplary embodiment of the control method for the electronic guzheng of this application;

[0041] Figure 12 This is a schematic flowchart of the sixth exemplary embodiment of the control method for the electronic guzheng of this application;

[0042] Figure 13 This is a schematic flowchart of the seventh exemplary embodiment of the control method for the electronic guzheng of this application;

[0043] Figure 14 This is a schematic flowchart of the eighth exemplary embodiment of the control method for the electronic guzheng of this application;

[0044] Figure 15 This is a schematic diagram of the functional modules of the electronic guzheng involved in the control method of the electronic guzheng in this application.

[0045] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0047] The main solution of this application embodiment is: acquiring the analog piezoelectric signal generated by the user playing the electronic guzheng; digitizing the analog piezoelectric signal to obtain and output target audio information. Based on this application solution, the acquired analog piezoelectric signal generated by the user's playing can be digitized to further determine the user's playing action and output the corresponding target audio information. This application enables the electronic guzheng to produce sound without relying on the original sound emitted by the mechanical vibration of the strings, realizing the digitization of the electronic guzheng. Thus, during the digitization process, it is easy to achieve digital tuning, transposition, and modulation audio effects; in addition, it also enables the electronic guzheng to overcome material limitations and improve its tonal performance through digitization. In summary, this embodiment can improve the performance of the electronic guzheng in multiple aspects.

[0048] Specifically, refer to Figure 1 , Figure 1This is a functional module diagram of the terminal device to which the control device for the electronic guzheng belongs in this application. The control device for the electronic guzheng can be a device independent of the terminal device, capable of controlling the electronic guzheng. It can be implemented on the terminal device in hardware or software form. The terminal device can be a smart mobile terminal with data processing capabilities, such as a mobile phone or tablet computer, or a fixed terminal device or server with data processing capabilities.

[0049] In this embodiment, the terminal device to which the control device of the electronic guzheng belongs includes at least an output module 110, a processor 120, a memory 130, and a communication module 140.

[0050] The memory 130 stores the operating system and the control program for the electronic guzheng. The control device of the electronic guzheng can acquire the analog piezoelectric signals generated by the user playing the electronic guzheng; digitize the analog piezoelectric signals, and store the target audio information and other information in the memory 130; the output module 110 can be a display screen, etc. The communication module 140 can include a WIFI module, a mobile communication module, and a Bluetooth module, etc., and communicates with external devices or servers through the communication module 140.

[0051] When the control program for the electronic guzheng in memory 130 is executed by the processor, it performs the following steps:

[0052] Acquire the analog piezoelectric signal generated by the user playing the electronic guzheng;

[0053] The analog piezoelectric signal is digitized to obtain and output the target audio information.

[0054] Furthermore, when the control program for the electronic guzheng in memory 130 is executed by the processor, it also performs the following steps:

[0055] The analog piezoelectric signal generated independently by each string of the electronic guzheng when the user plucks the strings is acquired using a first-type piezoelectric sensor.

[0056] Furthermore, when the control program for the electronic guzheng in memory 130 is executed by the processor, it also performs the following steps:

[0057] The analog piezoelectric signal generated independently by each string of the electronic guzheng when the user plays a glissando is acquired using a second type of piezoelectric sensor.

[0058] Furthermore, when the control program for the electronic guzheng in memory 130 is executed by the processor, it also performs the following steps:

[0059] The analog piezoelectric signal is rectified using a preset rectifier circuit to obtain an intermediate piezoelectric signal.

[0060] The intermediate piezoelectric signal is converted from digital to digital (A / D) to obtain a digital piezoelectric signal.

[0061] Determine whether the digital piezoelectric signal meets the preset triggering conditions;

[0062] If so, then generate the audio synthesis instructions and user playing information corresponding to the digital piezoelectric signal;

[0063] Audio is synthesized according to the audio synthesis instructions and the user's playing information to obtain and output the target audio information.

[0064] Furthermore, when the control program for the electronic guzheng in memory 130 is executed by the processor, it also performs the following steps:

[0065] Determine whether the digital piezoelectric signal satisfies the preset masking time trigger condition and voltage threshold trigger condition, respectively;

[0066] Furthermore, when the control program for the electronic guzheng in memory 130 is executed by the processor, it also performs the following steps:

[0067] The corresponding pre-stored target audio material is retrieved according to the audio synthesis instruction and the user playing information;

[0068] Audio is synthesized based on preset audio output effects and the target audio material to obtain and output the target audio information.

[0069] Furthermore, when the control program for the electronic guzheng in memory 130 is executed by the processor, it also performs the following steps:

[0070] In response to the user's settings, the audio output effect of the electronic guzheng is set, wherein the audio output effect includes one or more of the following: tuning mode, transposition function, and automatic pitch mode.

[0071] Furthermore, when the control program for the electronic guzheng in memory 130 is executed by the processor, it also performs the following steps:

[0072] The target audio information is subjected to D / A conversion to obtain an analog audio signal;

[0073] The preset audio playback unit is controlled to play the analog audio signal.

[0074] This embodiment, through the above-described scheme, specifically acquires the analog piezoelectric signal generated by the user playing the electronic guzheng; digitizes the analog piezoelectric signal to obtain and output target audio information. In this embodiment, the acquired analog piezoelectric signal generated by the user's playing can be digitized to obtain and output target audio information without relying on the original sound produced by the mechanical vibration of the strings, thus realizing the digitization of the electronic guzheng. In this way, the digitization process easily achieves digital tuning, transposition, and key changes; furthermore, it allows the electronic guzheng to overcome material limitations, improving its tonal performance through digitization. In summary, this embodiment can improve the performance of the electronic guzheng in multiple ways.

[0075] Reference Figure 2 The first embodiment of the control method for an electronic guzheng in this application provides a flowchart, wherein the control method for the electronic guzheng includes:

[0076] Step S10: Obtain the analog piezoelectric signal generated by the user playing the electronic guzheng.

[0077] Specifically, existing electronic guzheng uses a pickup to capture the sound produced by the mechanical vibration of the strings and amplifies or optimizes the sound. Based on this characteristic, existing electronic guzheng have the following drawbacks: ① Manufacturing requires a large amount of wood, and there are requirements for the materials and processing techniques; ② They are large in size and weight, making them inconvenient to carry; ③ Tuning the strings takes a long time, and it is not easy to play transpositions or key changes. If there are transpositions or key changes in a piece of music, more than one guzheng is needed to achieve this; ④ There are certain requirements for sound pickup / recording in performance venues / recording studios, and they are easily affected by equipment limitations or environmental interference; ⑤ They cannot simulate the sound of other musical instruments.

[0078] Therefore, this embodiment proposes a digital control method for the electronic guzheng. Piezoelectric sensors are pre-installed on various parts of the electronic guzheng to capture the user's playing actions. Specifically, the piezoelectric sensors are positioned at appropriate locations on the electronic guzheng (e.g., below one or both ends of the strings) to directly or indirectly sense pressure from the strings. When the user plays the electronic guzheng, the pressure of the strings on the piezoelectric sensors increases or decreases, correspondingly changing the resistance / capacitance within the piezoelectric sensors, thus causing a change in the amplitude of the measured voltage. At this time, the measured voltage of the piezoelectric sensor is an analog quantity, i.e., an analog piezoelectric signal.

[0079] Step S20: The analog piezoelectric signal is digitized to obtain and output the target audio information.

[0080] Specifically, after acquiring the analog piezoelectric signal generated by the user playing the electronic guzheng, the analog piezoelectric signal can be rectified, filtered, converted by A / D, and synthesized to obtain the target audio information in digital form. This processing is called digitization.

[0081] In the process of synthesizing target audio information, preset audio effect algorithms and materials can be used to synthesize the target audio information that meets the user's needs in terms of tuning, transposition, and modulation. Tuning, transposition, and modulation can be easily achieved even in the performance setting. Users can achieve a variety of playing techniques through the control method of the electronic guzheng in this embodiment. In addition, this embodiment does not require the pickup / recording of the original sound produced by the mechanical vibration of the strings. Instead, the target audio information is obtained and output by digitizing the analog piezoelectric signal generated by the user's playing action. The target audio information can be regarded as pickup / recording information and output directly, which is convenient for subsequent audio processing and is not affected by the environment. Furthermore, due to the different sound production method, the electronic guzheng in this embodiment has lower requirements for materials and processing technology compared to existing electronic guzheng. The control method of the electronic guzheng in this embodiment can be applied to smaller electronic guzheng and can also reduce processing costs.

[0082] After obtaining the target audio information, it can be directly output in digital form, for example, by converting it into an audio file and storing it on a computer or other terminal device for later processing; or, the target audio information can be converted into an analog audio signal and then used to control audio playback units such as speakers, headphones, etc., to play the audio based on the analog signal. In other words, the target audio information can be output in both digital and analog formats, and one or more of these methods can be selected according to actual needs.

[0083] This embodiment, through the above-described scheme, specifically acquires the analog piezoelectric signal generated by the user playing the electronic guzheng; digitizes the analog piezoelectric signal to obtain and output target audio information. In this embodiment, the acquired analog piezoelectric signal generated by the user's playing can be digitized to obtain and output target audio information without relying on the original sound produced by the mechanical vibration of the strings, thus realizing the digitization of the electronic guzheng. In this way, the digitization process easily achieves digital tuning, transposition, and key changes; furthermore, it allows the electronic guzheng to overcome material limitations, improving its tonal performance through digitization. In summary, this embodiment can improve the performance of the electronic guzheng in multiple ways.

[0084] Furthermore, referring to Figure 3 The second embodiment of the control method for an electronic guzheng in this application provides a flowchart, based on the above. Figure 2 In the illustrated embodiment, step S10, further refining the acquisition of the analog piezoelectric signal generated by the user playing the electronic guzheng, includes:

[0085] Step S101: Using a first type of piezoelectric sensor, acquire the analog piezoelectric signal generated independently by each string of the electronic guzheng when the user plucks the strings.

[0086] Specifically, in guzheng playing techniques, plucking the strings is one of the fundamental techniques (actions). This embodiment, targeting the plucking string application scenario, places a first-type piezoelectric sensor below each string of the electronic guzheng. The first-type piezoelectric sensor may or may not be in contact with the string. When the user plucks the string, the string vibrates accordingly, and this vibration is transmitted directly or indirectly to the first-type piezoelectric sensor. The first-type piezoelectric sensor can sense the pressure change caused by the vibration, which in turn causes a corresponding change in the resistance / capacitance within the sensor. Consequently, the amplitude of the measured voltage of the first-type piezoelectric sensor also changes accordingly, thus obtaining a simulated piezoelectric signal. In short, in this embodiment, the simulated piezoelectric signal is the measured voltage of the first-type piezoelectric sensor.

[0087] It is worth noting that the vibrations of adjacent strings may interfere with each other, leading to inaccurate sensing results from the Type I piezoelectric sensor. Therefore, signal isolation should be considered when setting up the Type I piezoelectric sensor. Specifically, vibration can be eliminated by using damping material at both ends of the string. Alternatively, independent Type I piezoelectric sensors can be placed below the bridge of each string, thus reducing the mutual interference of string vibrations.

[0088] Meanwhile, considering the relatively long strings of the guzheng, the sensing signal might be weak when playing at the end furthest from the first-type piezoelectric sensor. Therefore, first-type piezoelectric sensors can be placed at both ends of the same string; that is, sensor A can be placed near the nut, and sensor B near the bridge. This ensures that the first-type piezoelectric sensors can clearly detect the analog piezoelectric signal when the user plays. Furthermore, with first-type piezoelectric sensors at both ends of the same string, the signal strength at the nut and bridge can be used to roughly determine which end the user is playing closer to. Based on this determination, the tone can be controlled to more closely resemble a realistic performance.

[0089] Furthermore, the steps of this embodiment can be implemented using a first-type piezoelectric sensor based on piezoelectric ceramic materials, such as a buzzer or piezoelectric cable. For each string on the electronic guzheng, a first-type piezoelectric sensor can be installed at one or both ends of the string; if the two-end installation mode is selected, an additional first-type piezoelectric sensor can be installed below the middle of the string. In this case, each string has three corresponding independent first-type piezoelectric sensors, which can effectively improve the sensing effect of the first-type piezoelectric sensors. In other words, one, two, or three independent first-type piezoelectric sensors can be installed on each string of the electronic guzheng according to actual needs.

[0090] Based on the above hardware setup, analog piezoelectric signals generated independently by each string of the electronic guzheng when the user plucks the strings can be obtained through a first-type piezoelectric sensor.

[0091] This embodiment, through the above-described scheme, specifically uses a first-type piezoelectric sensor to acquire the analog piezoelectric signals generated independently by each string of the electronic guzheng when the user plucks it. In this embodiment, by appropriately setting the position of the first-type piezoelectric sensor, the analog piezoelectric signals generated independently by each string when the user plucks the electronic guzheng can be acquired. This facilitates subsequent digital processing of the analog piezoelectric signals, enabling the electronic guzheng to be digitized and improving its performance.

[0092] Furthermore, referring to Figure 4 The third embodiment of the control method for an electronic guzheng in this application provides a flowchart, based on the above. Figure 2 In the illustrated embodiment, step S10, further refining the acquisition of the analog piezoelectric signal generated by the user playing the electronic guzheng, includes:

[0093] Step S102: Using a second type of piezoelectric sensor, acquire the analog piezoelectric signal generated independently by each string of the electronic guzheng when the user plays a glissando.

[0094] Specifically, in guzheng playing techniques, glissando is one of the fundamental techniques (actions). This embodiment, targeting the application scenario of glissando, places an independent second-type piezoelectric sensor below each string of the electronic guzheng. The second-type piezoelectric sensor may or may not be in contact with the string. When the user plays a glissando, the string vibrates accordingly, and this vibration is transmitted directly or indirectly to the second-type piezoelectric sensor. The second-type piezoelectric sensor can sense the pressure change caused by the vibration, which in turn causes a corresponding change in the resistance / capacitance within the sensor, and the amplitude of the measured voltage of the second-type piezoelectric sensor also changes accordingly, thus obtaining a simulated piezoelectric signal. In short, in this embodiment, the simulated piezoelectric signal is the measured voltage of the second-type piezoelectric sensor.

[0095] More specifically, the second type of piezoelectric sensor involved in this embodiment can be a piezoelectric thin film material. For example... Figure 5 As shown, Figure 5 This is a schematic diagram illustrating the second type of piezoelectric sensor used in the control method of the electronic guzheng in this application. The strings of the electronic guzheng are at a certain angle to the surface of the instrument body, allowing for... Figure 5 The buffer material shown has a layer of piezoelectric thin film material in the middle, whose resistance or capacitance changes with the pressure position. When the user plays a glissando and presses down on a string, the thin film material under that string is pressed down sequentially in the direction of the arrow, causing its resistance or capacitance to change. Consequently, the measured voltage on the thin film material also changes accordingly, and this measured voltage is the analog piezoelectric signal. By detecting the amplitude of the analog piezoelectric signal, the amplitude of the glissando can be determined. When the user releases the pressure on the string, it returns to its original position due to the string's own elasticity.

[0096] Based on the aforementioned hardware configuration, a second type of piezoelectric sensor can be used to acquire the analog piezoelectric signal generated by the user playing the electronic guzheng with glissando. Similarly, the second type of piezoelectric sensor in this embodiment can also acquire the analog piezoelectric signal generated by the user playing the electronic guzheng with vibrato.

[0097] It is worth noting that the second and third embodiments of the control method for the electronic guzheng can be used in combination. If the second and third embodiments are used in combination, the steps of the second embodiment can obtain a first type of analog piezoelectric signal, and the steps of the third embodiment can obtain a second type of analog piezoelectric signal.

[0098] This embodiment, through the above-described scheme, specifically uses a second type of piezoelectric sensor to acquire the analog piezoelectric signals generated independently by the user playing the electronic guzheng with glissando. In this embodiment, by appropriately setting the position of the second type of piezoelectric sensor, the analog piezoelectric signals generated by the user playing the electronic guzheng with glissando can be acquired, facilitating subsequent digital processing of the analog piezoelectric signals, enabling the electronic guzheng to be digitized, and improving its performance.

[0099] Furthermore, referring to Figure 6 The fourth embodiment of the control method for an electronic guzheng in this application provides a flowchart, based on the above. Figure 3 and / or Figure 4 In the embodiment shown, step S20 involves digitizing the analog piezoelectric signal to obtain and output further refined target audio information, including:

[0100] Step S201: The analog piezoelectric signal is rectified based on a preset rectifier circuit to obtain an intermediate piezoelectric signal.

[0101] Specifically, the analog piezoelectric signal generated by the user playing the electronic guzheng, acquired through a piezoelectric sensor, is an AC analog piezoelectric signal, such as... Figure 7 As shown, Figure 7 This is a schematic diagram of the AC analog piezoelectric signal involved in the control method of the electronic guzheng in this application. The voltage value corresponding to the AC analog piezoelectric signal can be both positive and negative. In order to facilitate subsequent analysis and processing, it is necessary to convert the AC analog piezoelectric signal into a DC analog piezoelectric signal. The process of converting the electrical signal from AC to DC is called rectification.

[0102] More specifically, such as Figure 8 As shown, Figure 8 This diagram illustrates the rectifier circuit involved in the control method for the electronic guzheng of this application. The rectifier circuit includes a diode circuit and a capacitor charging / discharging circuit. The diode circuit includes diode D3_3, and the capacitor charging / discharging circuit includes inductors R6_3, R8_3, and capacitor C2_3. An AC analog piezoelectric signal is used as the input to the rectifier circuit. After rectification, a DC analog piezoelectric signal is obtained as the output. This DC analog piezoelectric signal can also be referred to as an intermediate piezoelectric signal.

[0103] Step S202: Perform A / D conversion on the intermediate piezoelectric signal to obtain a digital piezoelectric signal.

[0104] Specifically, the intermediate piezoelectric signal exists in analog form and needs to be converted into a digital piezoelectric signal by A / D conversion.

[0105] Step S203: Determine whether the digital piezoelectric signal meets the preset triggering conditions.

[0106] Specifically, digital piezoelectric signals can reflect whether a user is playing a musical action, and what kind of musical action it is. In order to determine whether a corresponding musical action exists based on the digital piezoelectric signal, at least one trigger condition can be preset. When the digital piezoelectric signal meets a certain trigger condition, it can be determined that a musical action corresponding to the trigger condition exists; when the digital piezoelectric signal does not meet a certain trigger condition, it can be determined that a musical action corresponding to the trigger condition does not exist.

[0107] Taking string plucking as an example, the plucking action should reflect which string the user is plucking and the force applied to that string. For digital piezoelectric signals, the source of the signal reflects which string the user is plucking, and the voltage amplitude reflects the force applied. Similarly, slide playing or other plucking actions can also reflect which string the user is plucking and the force applied.

[0108] Step S204: If yes, then generate the audio synthesis instruction and user playing information corresponding to the digital piezoelectric signal.

[0109] Specifically, if a playing action corresponding to a trigger condition is determined, then audio synthesis instructions and user playing information corresponding to the digital piezoelectric signal can be further generated. The audio synthesis instructions include instructions for processing the audio material during the audio synthesis process, such as instructions for frequency transformation of the audio material; the user playing information includes one or more types of information such as string identification information (used to identify which string it is), playing dynamics information, and glissando amplitude information.

[0110] Step S205: Perform audio synthesis according to the audio synthesis instructions and the user playing information to obtain and output the target audio information.

[0111] Specifically, the audio synthesis instructions and user playing information do not include information directly related to the audio. The corresponding audio materials need to be called according to the audio synthesis instructions and user playing information to synthesize the audio and obtain and output the target audio information.

[0112] This embodiment, through the above-described scheme, specifically rectifies the analog piezoelectric signal using a preset rectifier circuit to obtain an intermediate piezoelectric signal; performs an A / D conversion on the intermediate piezoelectric signal to obtain a digital piezoelectric signal; determines whether the digital piezoelectric signal meets a preset trigger condition; if so, generates an audio synthesis instruction and user playing information corresponding to the digital piezoelectric signal; and performs audio synthesis based on the audio synthesis instruction and user playing information to obtain and output the target audio information. In this embodiment, by rectifying and performing A / D conversion on the analog piezoelectric signal, a digital piezoelectric signal in digital form can be obtained. Subsequently, trigger condition judgment can be performed based on the digital piezoelectric signal to synthesize the target audio information in digital form. The target audio information can be easily used for post-processing, and digital or analog output can be performed based on the target audio information. Thus, the electronic guzheng is digitized, improving its performance.

[0113] Furthermore, referring to Figure 11 The fifth embodiment of the control method for an electronic guzheng in this application provides a flowchart, based on the above. Figure 6 In the illustrated embodiment, step S203, determining whether the digital piezoelectric signal meets the preset triggering conditions, is further refined, including:

[0114] Step S2031: Determine whether the digital piezoelectric signal satisfies the preset masking time trigger condition and voltage threshold trigger condition respectively;

[0115] Specifically, after rectifying the AC analog piezoelectric signal using a rectifier circuit, a DC analog piezoelectric signal can be obtained. For example... Figure 9 As shown, Figure 9 This diagram illustrates the ideal DC analog piezoelectric signal used in the control method of the electronic guzheng in this application. It shows that the ideal DC analog piezoelectric signal waveform is smooth and free of glitches. However, in reality, due to the influence of capacitor mismatch between the signal and the charging / discharging circuit, or interference from other factors, the actual DC analog piezoelectric signal waveform is not very regular, such as... Figure 10 As shown, Figure 10 This is a schematic diagram of the actual DC analog piezoelectric signal involved in the control method of the electronic guzheng in this application. It can be seen that the waveform of the actual DC analog piezoelectric signal is not smooth.

[0116] Because actual DC analog piezoelectric signals are not smooth enough, they can easily lead to misinterpretation of the user's playing actions. Therefore, this embodiment proposes two triggering conditions: a masking time triggering condition and a voltage threshold triggering condition. The actual DC analog piezoelectric signal is converted to a digital piezoelectric signal via A / D conversion. The triggering is only possible if the digital piezoelectric signal satisfies both the masking time triggering condition and the voltage threshold triggering condition.

[0117] Regarding the masking time trigger condition: A suitable masking time is preset, and the masking time calculation begins after the last determination based on the digital piezoelectric signal that the voltage threshold trigger condition is met. If the user is currently within the masking time, the masking time trigger condition is not met, and the voltage threshold trigger condition is not checked. If the user is not currently within the masking time, the masking time trigger condition is met, and the voltage threshold trigger condition is checked. The reason for setting the masking time trigger condition is that the user's playing speed is limited. Between two consecutive playing actions at the user's fastest playing speed, there will be a shortest action time interval. The masking time trigger condition matches the user's shortest action time interval. The masking time can be greater than or less than the shortest action time interval within a certain range. The user's fastest playing speed can be set based on prior knowledge or adjusted according to the user's actual playing speed during use.

[0118] Regarding voltage threshold triggering conditions: A suitable voltage threshold is preset. If, within a very short time (e.g., 0.5ms), the voltage amplitude A of the obtained digital piezoelectric signal is higher than the voltage amplitude B of the previously obtained digital piezoelectric signal, and the difference between voltage amplitude A and voltage amplitude B exceeds the preset voltage threshold, then the voltage threshold triggering condition is met, and subsequent triggering actions can be executed, i.e., obtaining the audio synthesis instruction corresponding to the digital piezoelectric signal and performing audio synthesis. If, within a very short time (e.g., 0.5ms), the voltage amplitude A of the obtained digital piezoelectric signal is lower than the voltage amplitude B of the previously obtained digital piezoelectric signal, or the difference between voltage amplitude A and voltage amplitude B does not exceed the preset voltage threshold, then the voltage threshold triggering condition is not met, and subsequent triggering actions are not executed. It is worth noting that for complex situations, a temporary voltage threshold can be set based on the current digital piezoelectric signal to prevent secondary triggering caused by voltage fluctuations before the previous triggering action has ended.

[0119] Furthermore, after determining that the voltage threshold trigger condition is met and executing the subsequent triggering action, the user's playing force can be inferred by combining the voltage changes of the digital piezoelectric signals sampled by the piezoelectric sensors at both ends of the string over a certain period of time. The final force value is obtained by looking up a force table using the maximum voltage. By modifying the force table, the force value obtained by the chip can be continuously calibrated, thereby improving the feel of playing the electronic guzheng.

[0120] It is understandable that the above-mentioned judgment actions regarding the masking time trigger condition and the voltage threshold trigger condition can be executed alternately.

[0121] This embodiment, through the above scheme, specifically determines whether the digital piezoelectric signal meets the preset masking time trigger condition and voltage threshold trigger condition respectively. In this embodiment, by determining the masking time trigger condition and voltage threshold trigger condition, it is ensured that the user's playing action can be accurately identified based on the digital piezoelectric signal, thereby synthesizing high-quality target audio information and improving the output quality of the electronic guzheng.

[0122] Furthermore, referring to Figure 12 The sixth embodiment of the control method for an electronic guzheng in this application provides a flowchart, based on the above. Figure 6 In the illustrated embodiment, step S205 involves performing audio synthesis based on the audio synthesis instructions and the user's playing information to obtain and output the target audio information. Further refinement of this process includes:

[0123] Step S2051: Retrieve the pre-stored corresponding target audio material according to the audio synthesis instruction and the user playing information.

[0124] Specifically, the audio synthesis instructions and user playing information do not include information directly related to the audio itself. Based on the audio synthesis instructions and user playing information, the corresponding audio material, i.e., the target audio material, can be retrieved from a preset audio material library. The audio materials in the audio material library can come from pre-stored sound samples or music material files.

[0125] Understandably, during the process of retrieving materials, the target audio material can be processed based on audio synthesis instructions, such as converting the frequency of the target audio material from 660Hz to 440Hz.

[0126] Step S2052: Based on the preset audio output effect and the target audio material, perform audio synthesis to obtain and output the target audio information.

[0127] Specifically, after retrieving the target audio material, audio synthesis can be performed directly based on the target audio material to obtain and output the target audio information.

[0128] Alternatively, audio can be synthesized based on preset audio output effects and target audio materials to obtain and output the target audio information. The audio output effects of the electronic guzheng are preset and can affect the overall performance of the electronic guzheng, thus obtaining richer target audio information.

[0129] This embodiment, through the above-described scheme, specifically retrieves pre-stored corresponding target audio materials according to the audio synthesis instructions and the user's playing information; performs audio synthesis based on preset audio output effects and the target audio materials to obtain and output the target audio information. In this embodiment, both the audio output effects and the audio materials can be flexibly set, thereby synthesizing target audio information with rich effects and improving the output effect of the electronic guzheng.

[0130] Furthermore, referring to Figure 13 The seventh embodiment of the control method for an electronic guzheng in this application provides a flowchart, based on the above. Figure 12 In the embodiment shown, before step S2052, which involves audio synthesis based on a preset audio output effect and the target audio material to obtain and output the target audio information, the method further includes:

[0131] Step S001: In response to the user's setting operation, the audio output effect of the electronic guzheng is set, wherein the audio output effect includes one or more of the following: tuning mode, transposition function, and automatic pitch mode.

[0132] Specifically, before audio synthesis, the audio output effects of the electronic guzheng need to be set. Users can perform these settings through the virtual human-computer interaction interface / physical interaction buttons on the electronic guzheng. The electronic guzheng responds to the user's settings and adjusts the relevant parameters of the audio output effects accordingly to complete the audio output effect settings. Alternatively, the audio output effects can also be set by importing a configuration file into the electronic guzheng. These audio output effects include one or more of the following: tuning mode, transposition function, and automatic pitch mode.

[0133] Regarding the tuning mode: Since this embodiment does not use the sound produced by the vibration of the strings themselves, the pitch of each string can be defined arbitrarily. The pitch of each string can be defined according to the commonly used tuning of the traditional guzheng, or it can be defined using unconventional pitch arrangements, such as using a natural scale, a chromatic scale, or the tuning pitch arrangement of a Japanese guzheng. Alternatively, the user can customize the pitch of each string as a user setting.

[0134] Regarding the transposition function: Since this embodiment does not use the sound produced by the vibration of the strings themselves, the pitch of all the strings can be uniformly raised or lowered by a fixed amount to achieve the purpose of transposition.

[0135] Regarding the automatic pitch mode: In guzheng playing, any pitch value within the range can be obtained through glissando techniques, including pitches that do not belong to any scale. For example, a pitch that is tens of cents higher or lower than the normal pitch value, i.e., not belonging to any key scale. When using the automatic pitch mode, it can synthesize target audio information that is closest to the standard pitch. This function is applicable to the playing of instruments whose timbre does not contain notes outside the standard pitch (e.g., simulating piano playing).

[0136] This embodiment, through the above-described scheme, specifically by responding to user settings, sets the audio output effects of the electronic guzheng. These audio output effects include one or more of tuning modes, transposition functions, and automatic pitch modes. In this embodiment, because the electronic guzheng is digitized, users can pre-set multiple audio output effects, which are then synthesized to obtain rich and varied target audio information, thus improving the output quality of the electronic guzheng.

[0137] Furthermore, referring to Figure 14 The eighth embodiment of the control method for an electronic guzheng in this application provides a flowchart, based on the above. Figure 2 In the embodiment shown, step S20 involves digitizing the analog piezoelectric signal to obtain and output further refined target audio information, including:

[0138] Step S206: Digitize the analog piezoelectric signal to obtain the target audio information;

[0139] Specifically, referring to step S10 of the first embodiment of the control method for an electronic guzheng in this application, the target audio information can be obtained by digitizing the analog piezoelectric signal.

[0140] Step S207: Perform D / A conversion on the target audio information to obtain an analog audio signal.

[0141] Specifically, after obtaining the target audio information in digital form, the target audio information can be output using either digital output or analog output.

[0142] If digital output is used, the target audio information can be directly output as a digital audio file (such as a recording file), for example, the target audio information can be transmitted to a computer for post-processing.

[0143] If analog output is used, the target audio information can be first converted to D / A (Digital to Analog Converter) to obtain an analog audio signal in analog form.

[0144] Step S208: Control the preset audio playback unit to play according to the analog audio signal.

[0145] Specifically, the electronic guzheng has a built-in or external audio playback unit, which can be a speaker, headphone, or other unit capable of playing audio. Furthermore, the audio playback unit can be controlled to play analog audio signals, completing the analog output of the target audio information.

[0146] This embodiment, through the above-described scheme, specifically performs D / A conversion on the target audio information to obtain an analog audio signal; then controls a preset audio playback unit to play the analog audio signal. In this embodiment, the target audio information obtained through digitization is converted from digital to analog to obtain an analog audio signal, which is then played back, achieving analog output (i.e., external playback) of the target audio information. Furthermore, the electronic guzheng of this embodiment, based on digitized target audio information, can achieve a better external playback effect than existing electronic guzheng.

[0147] Reference Figure 15 , Figure 15 This is a schematic diagram of the functional modules of the electronic guzheng involved in the control method of the electronic guzheng in this application, based on... Figure 15 The ninth embodiment of the control method for the electronic guzheng proposed in this application is presented.

[0148] Specifically, the electronic guzheng can include Figure 15 The functional operation modules shown are: A, trigger module; B, control module; C, sound synthesis module; D, sampling and storage module; E, digital-to-analog conversion and power amplifier module; and F.

[0149] Regarding Function Operation Module A: It provides users with options to select the current playing tone, guzheng tuning mode, transposition function, MIDI settings, automatic pitch mode, effect parameters, etc. Function Operation Module A can be implemented based on physical interactive buttons and supporting software algorithms, and its function is equivalent to an effects unit.

[0150] Regarding trigger module B: It contains separate trigger detection devices for string plucking and glissando triggering. The string plucking trigger detects which string is being plucked, as well as the state and force of the plucking. The glissando trigger detects the real-time variation in glissando pitch. The damping trigger detects whether the user needs a damping effect (stopping all sound during performance).

[0151] Regarding control module C: It integrates the input data from function operation module A and trigger module B, generates audio synthesis instructions, and sends them to sound synthesis module D.

[0152] Regarding the sound synthesis module D: Based on the audio synthesis instructions sent by the control module C, it retrieves the corresponding sound samples or music files from the sample storage module E and performs audio synthesis to obtain the target audio information.

[0153] Regarding the sample storage module E: It is used to store pre-made sound samples and music files for use by the sound synthesis module D.

[0154] Regarding the digital-to-analog converter and power amplifier module F: It converts the target audio information output by the sound synthesis module D into an analog audio signal, amplifies the analog audio signal appropriately, and outputs it to speakers or headphones.

[0155] Furthermore, the functional modules of this embodiment can also be adapted to any step in the first to eighth embodiments of the electronic guzheng control method of this application to achieve control of the electronic guzheng.

[0156] In this embodiment, the functional operation module A, trigger module B, control module C, sound synthesis module D, sampling and storage module E, and digital-to-analog conversion and power amplifier module F can be integrated into the electronic guzheng. This allows the electronic guzheng to produce sound independently of the mechanical vibration of the strings, thus achieving the digitization of the electronic guzheng. This facilitates the digitalization process by easily achieving digital tuning, transposition, and key changes in audio. Furthermore, it frees the electronic guzheng from material limitations, improving its tonal performance through digital processing. In summary, this embodiment can improve the performance of the electronic guzheng in multiple ways.

[0157] Furthermore, this application also proposes an electronic guzheng, which includes a memory, a processor, and a control program for the electronic guzheng stored in the memory and executable on the processor. When the control program for the electronic guzheng is executed by the processor, it implements the steps of the control method for the electronic guzheng as described above.

[0158] Since the control program of this electronic guzheng adopts all the technical solutions of all the aforementioned embodiments when it is executed by the processor, it has at least all the beneficial effects brought about by all the technical solutions of all the aforementioned embodiments, which will not be repeated here.

[0159] Furthermore, embodiments of this application also propose a computer-readable storage medium storing a control program for an electronic guzheng, wherein the control program for the electronic guzheng, when executed by a processor, implements the steps of the control method for the electronic guzheng as described above.

[0160] Since the control program of this electronic guzheng adopts all the technical solutions of all the aforementioned embodiments when it is executed by the processor, it has at least all the beneficial effects brought about by all the technical solutions of all the aforementioned embodiments, which will not be repeated here.

[0161] Compared to existing technologies, the electronic guzheng control method, electronic guzheng, and storage medium proposed in this application acquire analog piezoelectric signals generated by a user playing the electronic guzheng; digitize the analog piezoelectric signals to obtain and output target audio information. Based on this application's solution, the acquired analog piezoelectric signals generated by the user's playing can be digitized to obtain and output target audio information without relying on the original sound produced by the mechanical vibration of the strings, thus realizing the digitization of the electronic guzheng. In this way, digital tuning, transposition, and modulation effects can be easily achieved during the digitization process; furthermore, it allows the electronic guzheng to overcome material limitations and improve its tonal performance through digitization. In summary, this embodiment can improve the performance of the electronic guzheng in multiple ways.

[0162] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0163] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0164] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, controlled terminal, or network device, etc.) to execute the methods of each embodiment of this application.

[0165] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A control method for an electronic guzheng, characterized in that, The control method for the electronic guzheng includes: The system acquires analog piezoelectric signals generated by a user playing the electronic guzheng. Specifically, it acquires analog piezoelectric signals generated independently by the user plucking each string of the electronic guzheng using a first-type piezoelectric sensor, and / or acquires analog piezoelectric signals generated independently by the user playing glissando on each string of the electronic guzheng using a second-type piezoelectric sensor. The first-type piezoelectric sensor is positioned below each string of the electronic guzheng, and may or may not be in contact with the string. When the user plucks the string, the string vibrates accordingly, and this vibration is directly or indirectly transmitted to the first-type piezoelectric sensor. The vibration of the string is eliminated by using damping material at both ends of the string. An independent second-type piezoelectric sensor is positioned below each string of the electronic guzheng, and may or may not be in contact with the string. When the user plays glissando, the string vibrates accordingly, and this vibration is directly or indirectly transmitted to the second-type piezoelectric sensor. The analog piezoelectric signal is digitized to obtain and output the target audio information; The analog piezoelectric signal is rectified using a preset rectifier circuit to obtain an intermediate piezoelectric signal; the intermediate piezoelectric signal is then converted from analog to digital to obtain a digital piezoelectric signal; it is then determined whether the digital piezoelectric signal meets preset trigger conditions, including whether the digital piezoelectric signal meets preset masking time trigger conditions and voltage threshold trigger conditions, wherein the masking time is dynamically adjusted according to the user's actual playing speed; regarding the voltage threshold trigger condition: if the voltage amplitude A of the digital piezoelectric signal obtained within a preset time is higher than the voltage amplitude B of the previously obtained digital piezoelectric signal, and the voltage amplitude A is higher than the voltage amplitude B of the previously obtained digital piezoelectric signal, and the voltage amplitude A is higher than the voltage amplitude B of the previously obtained digital piezoelectric signal, then the voltage amplitude A is higher than the voltage amplitude B of the previously obtained digital piezoelectric signal. If the difference between voltage amplitude B and voltage amplitude B exceeds a preset voltage threshold, the voltage threshold triggering condition is met, and subsequent triggering actions are executed. If the voltage amplitude A of the digital piezoelectric signal obtained within a preset time is lower than the voltage amplitude B of the previously obtained digital piezoelectric signal, or if the difference between voltage amplitude A and voltage amplitude B does not exceed the preset voltage threshold, the voltage threshold triggering condition is not met, and subsequent triggering actions are not executed. If so, an audio synthesis instruction and user playing information corresponding to the digital piezoelectric signal are generated. Audio synthesis is performed according to the audio synthesis instruction and the user playing information to obtain and output the target audio information.

2. The control method for an electronic guzheng as described in claim 1, characterized in that, The step of synthesizing audio based on the audio synthesis instructions and the user playing information to obtain and output the target audio information includes: The corresponding pre-stored target audio material is retrieved according to the audio synthesis instruction and the user playing information; Audio is synthesized based on preset audio output effects and the target audio material to obtain and output the target audio information.

3. The control method for an electronic guzheng as described in claim 2, characterized in that, Before the step of synthesizing audio based on a preset audio output effect and the target audio material to obtain and output the target audio information, the method further includes: In response to the user's settings, the audio output effect of the electronic guzheng is set, wherein the audio output effect includes one or more of the following: tuning mode, transposition function, and automatic pitch mode.

4. The control method for an electronic guzheng as described in claim 1, characterized in that, The step of digitizing the analog piezoelectric signal to obtain and output the target audio information includes: The analog piezoelectric signal is digitized to obtain the target audio information; The target audio information is subjected to D / A conversion to obtain an analog audio signal; The preset audio playback unit is controlled to play the analog audio signal.

5. An electronic guzheng, characterized in that, The electronic guzheng includes a memory, a processor, and a control program for the electronic guzheng stored in the memory and executable on the processor. When the control program for the electronic guzheng is executed by the processor, it implements the steps of the control method for the electronic guzheng as described in any one of claims 1-4.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a control program for an electronic guzheng, which, when executed by a processor, implements the steps of the control method for an electronic guzheng as described in any one of claims 1-4.

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