Guitar and method for adjusting guitar tone

Abstract

The present invention discloses a new type of guitar, including a guitar body, a split-string pickup device, an A / D converter, a DSP signal processor, a sound source library and a D / A converter, wherein the split-string pickup device includes a pickup device arranged under each string, the split-string pickup device is connected to the A / D converter, the A / D converter is connected to the DSP signal processor, the DSP signal processor is connected to the sound source library, and the D / A converter is connected to the DSP signal processor or to the sound source library. The guitar of the present invention has a built-in sound source, and by calling the sound source, it can emit the timbres of various other types of guitars and various other musical instruments, and can simulate the timbres of both single-tone musical instruments and harmonic musical instruments, providing convenience for musicians' recording and performance, and using a guitar to achieve diversified song creation.

Description

Technical Field

[0001] The invention belongs to the technical field of musical instruments, and in particular relates to a guitar and a method for adjusting the timbre of the guitar. Background Art

[0002] As a product of modern science and technology, electric guitar is popular among the public for its rich expressiveness. However, the existing electric guitar has a single tone. When performing live or recording, it is often difficult to use the tone of other instruments. First, it is difficult for guitarists to play other instruments besides guitar. Second, even if you can get a variety of other instruments together, the cost is high and it is inconvenient to carry.

[0003] In the prior art, although there are methods of using guitar to simulate the timbre of other musical instruments, they can only simulate the timbre of a single musical instrument, because the existing electric guitar generally collects the vibration of the strings through a pickup and converts the vibration signal into an electrical signal. When multiple strings are plucked at the same time, the pickup picks up a mixed signal emitted by multiple strings. If the sound source is to be retrieved, the vibration signal of each string must be separated. The actual operation has high technical requirements and is difficult to achieve. In addition, since the sound source can only be retrieved after the signal is separated, there is a problem of large output delay, so the timbre of a harmonic instrument cannot be simulated. Therefore, the scope of use is limited. How to use guitar to play various musical instruments, sound effects, sampling, etc. to expand more timbres, mix and arrange, and enhance the expressiveness during performance is a problem currently faced by guitarists. Summary of the invention

[0004] In view of the defects of the above-mentioned prior art, the present invention aims to provide a guitar and a method for adjusting the timbre of the guitar, aiming to solve the following problems:

[0005] (1) When guitarists want to use the timbre of other instruments during performances and recordings, this is often difficult to achieve. Firstly, it is difficult for guitarists to play other instruments besides guitar. Secondly, even if they can gather together a variety of other instruments, the cost is high and they are inconvenient to carry.

[0006] (2) In the prior art, guitars can only simulate the timbre of monophonic instruments, but cannot simulate the timbre of harmonic instruments.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A guitar, characterized in that it comprises a guitar body, a split-string sound pickup device, an A / D converter, a DSP signal processor, a sound source library and a D / A converter, wherein the split-string sound pickup device comprises a sound pickup device arranged under each string, the split-string sound pickup device is connected to the A / D converter, the A / D converter is connected to the DSP signal processor, the DSP signal processor is connected to the sound source library, and the D / A converter is connected to the DSP signal processor or to the sound source library.

[0009] Furthermore, the split-string sound pickup device is a piezoelectric sensor, an electromagnetic sensor, or an infrared detection sensor. The split-string sound pickup device detects string vibration and converts the vibration signal into an analog electrical signal.

[0010] Furthermore, the DSP signal processor analyzes the vibration characteristics of each string when it is plucked, and the vibration characteristics include the pitch, strength, attack and tail parameters of each string when it is plucked.

[0011] Furthermore, the DSP signal processor forms a call-up protocol instruction for each string based on the vibration characteristics, and sends the call-up protocol instruction to different digital signal channels, which call up the timbre of each string and merge them into a sound signal output.

[0012] Furthermore, the DSP signal processor also includes an effector module, which is used to increase the timbre effect of guitar playing.

[0013] Furthermore, the sound sources in the sound source library may be recorded through sampling, or may be self-synthesized timbres.

[0014] Furthermore, the timbres in the sound source library include different types of guitar timbres and / or timbres of other musical instruments and / or artificially synthesized timbres. A correspondence between each guitar string and the timbre in the sound source library is established in advance according to the vibration characteristic parameters. When a retrieval protocol instruction is received, the timbre corresponding to the guitar string is retrieved according to the guitar type / other musical instrument type / synthesized timbre selected by the user.

[0015] Furthermore, the DSP signal processor is also provided with an offset parameter module. When the range of the guitar does not match the range of the instrument to be tuned, the offset parameter is adjusted so that the range of the guitar falls into or covers the range of the instrument to be tuned.

[0016] Furthermore, the DSP signal processor is also provided with a pitch bending processing module. The electric guitar is a musical instrument with pitch bending playing techniques. When the musical instrument to be simulated does not support the pitch bending technique, the pitch bending parameters of the electric guitar can be turned off through the pitch bending processing module. When the musical instrument to be simulated supports the pitch bending technique, the pitch bending parameters can be turned on through the pitch bending processing module.

[0017] Furthermore, the guitar is also provided with a bypass switch, which is turned on when the sound source access function is not needed or when there is no power.

[0018] A method for tuning the timbre of a guitar, applied to the above-mentioned guitar, is characterized by comprising the following steps:

[0019] S1. pluck the guitar strings, the split string pickup detects the vibration of the corresponding strings and generates an analog electrical signal;

[0020] S2. The analog electrical signal is converted into a digital signal, and the DSP signal processor analyzes and obtains the vibration characteristics of the corresponding strings, and forms a call protocol instruction for the corresponding strings according to the vibration characteristics of the corresponding strings;

[0021] S3. According to the protocol instruction, retrieve the timbre corresponding to the corresponding string in the sound source library;

[0022] S4. synthesize the timbre of each string and convert the digital signal into an analog audio signal.

[0023] Furthermore, in step S1, when plucking the guitar strings, one string may be plucked at a time, or the chords may be plucked in a sweeping manner.

[0024] Furthermore, in step S3, before calling up the timbre, a correspondence between each string of the guitar and the timbre in the sound source library is established in advance in the sound source library according to the vibration characteristic parameters.

[0025] A method for tuning the timbre of a guitar, applied to the above-mentioned guitar, is characterized by comprising the following steps:

[0026] S1. pluck the guitar strings, the split string pickup detects the vibration of the corresponding strings and generates an analog electrical signal;

[0027] S2. The analog electrical signal is converted into a digital signal, and the DSP signal processor analyzes and obtains the vibration characteristics of the corresponding strings, and forms a call protocol instruction for the corresponding strings according to the vibration characteristics of the corresponding strings;

[0028] S3. According to the protocol instruction, retrieve the timbre corresponding to the corresponding string in the sound source library;

[0029] S4. The timbres tuned by the strings are synthesized into a sound signal, and the sound signal is sent to a DSP signal processor. The DSP signal processor may superimpose effects on the sound signal or may not process the sound signal.

[0030] S5. Convert the digital signal into an analog audio signal.

[0031] Furthermore, in step S1, when plucking the guitar strings, one string may be plucked at a time, or the chords may be plucked in a sweeping manner.

[0032] Furthermore, in step S3, before calling up the timbre, a correspondence between each string of the guitar and the timbre in the sound source library is established in advance in the sound source library according to the vibration characteristic parameters.

[0033] Beneficial Effects

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] (1) The present invention provides a guitar with a built-in sound source. By calling up the sound source, the guitar can produce the timbres of various other types of guitars and various other musical instruments, thereby providing convenience for musicians in recording and performing. A diversified song creation can be achieved using only one guitar.

[0036] (2) The guitar provided by the present invention has a built-in effect module. Therefore, when it is necessary to add effects to the guitar tone or the tuned tone, there is no need to connect an external effector, which brings convenience to the musician's performance and avoids the trouble of carrying the effector and connecting cables when going out.

[0037] (3) The present invention utilizes a split-string pickup device to monitor the vibration of each guitar string and generates a protocol instruction for adjusting the timbre of each string, thereby achieving the simulation of both the timbre of a monophonic instrument and the timbre of a harmonic instrument.

[0038] (4) The guitar provided by the present invention is also provided with a bypass switch, so that it can be used as an ordinary electric guitar or as a device for adjusting a sound source. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A block diagram of the internal structure of a guitar provided by an embodiment of the present invention;

[0040] Figure 2 Another guitar internal structure block diagram provided by an embodiment of the present invention;

[0041] Figure 3 A schematic diagram of the external structure of a guitar provided by an embodiment of the present invention.

[0042] Among them: 1-guitar body; 2-split string pickup device; 3-bypass switch. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions of various embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0044] Example 1

[0045] This embodiment provides a guitar, characterized in that it includes a guitar body, a split-string pickup device, an A / D converter, a DSP signal processor, a sound source library and a D / A converter, wherein the split-string pickup device includes a pickup device arranged under each string, the split-string pickup device is connected to the A / D converter, the A / D converter is connected to the DSP signal processor, the DSP signal processor is connected to the sound source library, and the D / A converter is connected to the DSP signal processor or to the sound source library.

[0046] Furthermore, the split-string sound pickup device is a piezoelectric sensor or an electromagnetic sensor or an infrared detection sensor, which is arranged under each string in a one-to-one correspondence. The string vibration is detected by the split-string sound pickup device, and the vibration signal is converted into an analog electrical signal.

[0047] Furthermore, the DSP signal processor analyzes the vibration characteristics of each string when it is plucked, and the vibration characteristics include the pitch, strength, attack and tail parameters of each string when it is plucked.

[0048] The specific method is: after converting the analog electrical signal into a digital signal through an analog-to-digital conversion unit, the envelope value of each guitar string when playing is obtained to obtain the real-time amplitude value. When the rising speed of the rising edge of the envelope is greater than a certain threshold, it is considered that the current is the sound head, and the start position is defined at the sound head position. It is considered that the delay between the start and the sound head can be ignored. After obtaining the real-time amplitude value of the guitar note, it can be seen from the envelope that the amplitude of the note decays over time. Then, when the amplitude value decays to a certain threshold, it is the tail position. The amplitude value at the sound head position is used as the intensity. The pitch is determined by the vibration frequency, and the frequency of each guitar string when playing is obtained through the extreme value detection method.

[0049] Furthermore, the DSP signal processor forms a call-up protocol instruction for each string based on the vibration characteristics, and sends the call-up protocol instruction to different digital signal channels, which call up the timbre of each string and merge them into a sound signal output.

[0050] A guitar usually has six strings. Therefore, in this embodiment, six pickup devices are used to pick up the vibration signals of the corresponding strings respectively. After analog-to-digital conversion, the DSP signal processor analyzes the vibration characteristics of each string when it is plucked, and forms respective call-up protocol instructions for the six strings. The call-up protocol instructions for the six strings are sent to different digital signal channels respectively, so that each protocol instruction can individually call up the timbre in the sound source library, and after each timbre is called up, they are merged into one sound signal output.

[0051] Furthermore, the DSP signal processor also includes an effector module, which is used to increase the timbre effect of guitar playing.

[0052] When playing an electric guitar, various effects are usually connected to enrich the performance. In this embodiment, since the guitar has its own effects, when it is necessary to add effects to the guitar tone or the tuned tone, there is no need to connect an external effects, which brings convenience to the musicians and avoids the trouble of carrying effects and connecting cables.

[0053] Furthermore, the sound sources in the sound source library may be recorded by sampling, or may be synthesized by themselves. For example, the user may synthesize the desired sound by waveform synthesis or particle synthesis according to the vibration characteristic parameters.

[0054] Furthermore, the timbres in the sound source library include different types of guitar timbres and / or timbres of other musical instruments and / or artificially synthesized timbres. A correspondence between each guitar string and the timbre in the sound source library is established in advance according to the vibration characteristic parameters. When a retrieval protocol instruction is received, the timbre corresponding to the guitar string is retrieved according to the guitar type / other musical instrument type / synthesized timbre selected by the user.

[0055] Guitar is a plucked string instrument that includes many types. Common guitar types include folk guitar, classical guitar, electric guitar, ukulele, electric bass, jazz guitar, and flamenco guitar. The guitar in this implementation is an electric guitar. When the user wants to produce the sound of other types of guitars, a one-to-one correspondence between the electric guitar and the timbre of each string of the guitar to be tuned is established in advance in the sound source library according to the vibration characteristic parameters.

[0056] When the user wants to call up the sound of other musical instruments, the corresponding relationship between each string of the guitar and the timbre of other musical instruments in the sound source library is established in advance according to the vibration characteristic parameters. According to the type of the musical instrument, it is divided into monophonic instruments and harmonic instruments. When the sound of the instrument to be imitated is a monophonic instrument, such as a flute, the user should only pluck one string at a time when plucking the guitar, and call up the flute timbre corresponding to the vibration characteristic parameters of the string in the sound source library. When the instrument to be imitated is a harmonic instrument, the user can pluck multiple strings at the same time or only pluck one string, and call up the timbre corresponding to the vibration characteristic parameters of each guitar string in the sound source library.

[0057] Furthermore, the DSP signal processor is also provided with an offset parameter module. When the range of the guitar does not match the range of the instrument to be tuned, the offset parameter is adjusted so that the range of the guitar falls into or covers the range of the instrument to be tuned, so as to establish a timbre correspondence between the guitar strings and the instrument to be tuned.

[0058] Furthermore, the DSP signal processor is also provided with a pitch bending processing module. The electric guitar is a musical instrument with pitch bending playing techniques. When the musical instrument to be simulated does not support the pitch bending technique, the pitch bending parameters of the electric guitar can be turned off through the pitch bending processing module. When the musical instrument to be simulated supports the pitch bending technique, the pitch bending parameters can be turned on through the pitch bending processing module.

[0059] Furthermore, the guitar is also provided with a bypass switch. When the function of calling up the sound source is not needed or there is no power, the bypass switch is turned on and the guitar is converted into a conventional electric guitar.

[0060] Example 2

[0061] A method for tuning the timbre of a guitar, applied to the guitar in Example 1, is characterized by comprising the following steps:

[0062] S1. pluck the guitar strings, the split string pickup detects the vibration of the corresponding strings and generates an analog electrical signal;

[0063] S2. The analog electrical signal is converted into a digital signal, and the DSP signal processor analyzes and obtains the vibration characteristics of the corresponding strings, and forms a call protocol instruction for the corresponding strings according to the vibration characteristics of the corresponding strings;

[0064] S3. According to the protocol instruction, retrieve the timbre corresponding to the corresponding string in the sound source library;

[0065] S4. Combine the timbres tuned by the strings and convert the digital signal into an analog audio signal.

[0066] Furthermore, in step S1, when plucking the guitar strings, one string may be plucked at a time, or the chords may be plucked in a sweeping manner.

[0067] Furthermore, in step S3, before calling up the timbre, a correspondence between each string of the guitar and the timbre in the sound source library is established in advance in the sound source library according to the vibration characteristic parameters.

[0068] Example 3

[0069] A method for tuning the timbre of a guitar, applied to the guitar in Example 1, is characterized by comprising the following steps:

[0070] S1. pluck the guitar strings, the split string pickup detects the vibration of the corresponding strings and generates an analog electrical signal;

[0071] S2. The analog electrical signal is converted into a digital signal, and the DSP signal processor analyzes and obtains the vibration characteristics of the corresponding strings, and forms a call protocol instruction for the corresponding strings according to the vibration characteristics of the corresponding strings;

[0072] S3. According to the protocol instruction, retrieve the timbre corresponding to the corresponding string in the sound source library;

[0073] S4. Combining the timbres tuned by the strings into a sound signal, and sending the sound signal to a DSP signal processor, wherein the DSP signal processor may superimpose effects on the sound signal or may not process the sound signal.

[0074] S5. Convert the digital signal into an analog audio signal.

[0075] Furthermore, in step S1, when plucking the guitar strings, one string may be plucked at a time, or the chords may be plucked in a sweeping manner.

[0076] Furthermore, in step S3, before calling up the timbre, a correspondence between each string of the guitar and the timbre in the sound source library is established in advance in the sound source library according to the vibration characteristic parameters.

[0077] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A guitar, characterized in that: The guitar comprises a guitar body, a split-string sound pickup device, an A / D converter, a DSP signal processor, a sound source library and a D / A converter, wherein the split-string sound pickup device comprises a sound pickup device arranged under each string, the split-string sound pickup device is connected to the A / D converter, the A / D converter is connected to the DSP signal processor, the DSP signal processor is connected to the sound source library, and the D / A converter is connected to the DSP signal processor or to the sound source library; The DSP signal processor analyzes the vibration characteristics of each string when it is plucked, and the vibration characteristics include the pitch, strength, attack and tail parameters of each string when it is plucked; The DSP signal processor forms a call-up protocol instruction for each string based on the vibration characteristics, and sends the call-up protocol instruction to different digital signal channels, and each of them calls up the timbre and then merges it into a sound signal output; The timbres in the sound source library include different types of guitar timbres and / or timbres of other musical instruments and / or artificially synthesized timbres. A correspondence between each guitar string and a timbre in the sound source library is established in advance according to vibration characteristic parameters. When a call-up protocol instruction is received, the timbre corresponding to the guitar string is called according to the guitar type / other musical instrument type / synthesized timbre selected by the user; The DSP signal processor is also provided with an offset parameter module. When the range of the guitar does not match the range of the instrument to be tuned, the offset parameter is adjusted so that the range of the guitar falls into or covers the range of the instrument to be tuned. The DSP signal processor is also provided with a pitch bending processing module. The electric guitar is a musical instrument with a pitch bending playing technique. When the musical instrument to be simulated does not support the pitch bending technique, the pitch bending parameters of the electric guitar can be turned off through the pitch bending processing module. When the musical instrument to be simulated supports the pitch bending technique, the pitch bending parameters can be turned on through the pitch bending processing module. The DSP signal processor also includes an effector module, which is used to increase the timbre effect when playing the guitar.

2. A guitar according to claim 1, characterized in that: The split-string sound pickup device is a piezoelectric sensor, an electromagnetic sensor, or an infrared detection sensor. The split-string sound pickup device detects the vibration of the strings and converts the vibration signal into an analog electrical signal.

3. A guitar according to claim 1, characterized in that: The sound sources in the sound source library are recorded by sampling, or are self-synthesized timbres.

4. A method for tuning the timbre of a guitar, applied to the guitar according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. pluck the guitar strings, the split string pickup detects the vibration of the corresponding strings and generates an analog electrical signal; S2. The analog electrical signal is converted into a digital signal, and the DSP signal processor analyzes and obtains the vibration characteristics of the corresponding strings, and forms a call protocol instruction for the corresponding strings according to the vibration characteristics of the corresponding strings; S3. According to the protocol instruction, retrieve the timbre corresponding to the corresponding string in the sound source library; S4. Combine the timbres tuned by the strings and convert the digital signal into an analog audio signal.

5. The method for tuning the guitar tone according to claim 4, characterized in that: In step S3, before calling up the timbre, a correspondence between each string of the guitar and the timbre in the sound source library is established in advance in the sound source library according to the vibration characteristic parameters.

6. A method for tuning the timbre of a guitar, applied to the guitar according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. pluck the guitar strings, the split string pickup detects the vibration of the corresponding strings and generates an analog electrical signal; S2. The analog electrical signal is converted into a digital signal, and the DSP signal processor analyzes and obtains the vibration characteristics of the corresponding strings, and forms a call protocol instruction for the corresponding strings according to the vibration characteristics of the corresponding strings; S3. According to the protocol instruction, retrieve the timbre corresponding to the corresponding string in the sound source library; S4. Merge the timbre of each string into a sound signal, and send the sound signal to the DSP signal processor, which can superimpose the sound signal effect or not process the sound signal; S5. Convert the digital signal into an analog audio signal.

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