JP2021157016A - Musical instrument adjustment device, adjustment method, and manufacturing method - Google Patents

Abstract

To provide an adjusting device, an adjusting method, and a manufacturing method capable of easily adjusting sound quality of a musical instrument.SOLUTION: In this present embodiment, an adjusting device includes: a sound source 102 which outputs a sound source signal for adjusting a tone color of a musical instrument 400 having a wooden soundboard; a first equalizer 103 which changes frequency characteristics of the sound source signal according to characteristics of an exciter 300; a second equalizer 104 which changes the frequency characteristics of the sound source signal from the first equalizer 103; a spectrum analyzer 101 which analyzes a spectrum of an adjusted tone generated by the instrument 400 due to vibration from the exciter 300; and a controller 106 which controls the second equalizer 104 according to an analysis result of the spectrum.SELECTED DRAWING: Figure 1

Description

The present invention relates to a musical instrument adjusting device, an adjusting method, and a manufacturing method.

Patent Document 1 discloses a device and a method for vibrating a stringed instrument. In the device of Patent Document 1, in order to season a stringed instrument having a wooden body, vibration is generated in the stringed instrument through a bridge of the instrument. Specifically, the device of Patent Document 1 includes a bridge cradle that is detachably attached to a bridge of a stringed instrument. Then, an electric vibration generator is attached to the bridge cradle. An electric vibration generator is used to break in the musical instrument.

Japanese Patent Application Laid-Open No. 2009-505137

In the device of Patent Document 1, it is necessary to attach an electric vibration generator to the bridge cradle. Therefore, there is a problem that it is difficult to mount the bridge / cradle depending on the shape of the bridge / cradle. In addition, it may not be possible to attach an electric vibration generator to musical instruments of different types or sizes.

The present disclosure has been made in view of the above points, and an object of the present invention is to provide an adjusting device, an adjusting method, and a manufacturing method capable of easily adjusting the timbre of a musical instrument.

The adjusting device according to the present embodiment is an adjusting device that adjusts the tone color of a musical instrument having a wooden soundboard, and is a sound source that outputs a sound source signal for vibrating an exciter attached to the musical instrument, and characteristics of the exciter. The first equalizer that changes the frequency characteristics of the sound source signal according to the above, the second equalizer that changes the frequency characteristics of the sound source signal from the first equalizer and outputs it to the exciter, and the vibration of the exciter. It includes a spectrum analyzer that analyzes the spectrum of the adjusted sound generated by the musical instrument, and a controller that controls the second equalizer according to the analysis result of the spectrum.

The adjustment method according to the present embodiment is an adjustment method for adjusting the tone color of a musical instrument having a wooden soundboard, and includes a step of outputting a sound source signal for vibrating an exciter attached to the musical instrument and a characteristic of the exciter. Correspondingly, the first equalizer changes the frequency characteristics of the sound source signal, the second equalizer changes the frequency characteristics of the sound source signal from the first equalizer, and outputs the sound source signal to the exciter. It includes a step of analyzing the spectrum of the adjusted sound generated by the musical instrument by the vibration from the above, and a step of controlling the second equalizer according to the analysis result of the spectrum.

According to the present disclosure, it is possible to provide an adjusting device, an adjusting method, and a manufacturing method capable of easily adjusting the timbre of a musical instrument.

It is a figure which shows the structure of the adjustment device which concerns on this embodiment. It is a front view for demonstrating an example of the mounting position of an exciter. It is a side view for demonstrating an example of the mounting position of an exciter. It is a side view for demonstrating another example of the mounting position of an exciter.

Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. However, the present disclosure is not limited to the following embodiments. In addition, the following description and drawings have been simplified as appropriate to clarify the description.

Embodiment 1.
The adjusting device 100 according to the present embodiment will be described with reference to FIG. The adjusting device 100 adjusts the timbre of the musical instrument 400 having a wooden soundboard. For example, the adjusting device 100 uses the exciter 300 to vibrate the wooden soundboard to age the musical instrument 400 (also referred to as seasoning). By performing aging, the timbre of the musical instrument 400 can be stabilized.

Here, the musical instrument 400 can be a stringed instrument such as an acoustic guitar, a violin, an ukulele, a viola, a cello, or a mandolin. Further, the musical instrument 400 is not limited to a stringed musical instrument, and may be a keyboard instrument such as a piano or a harpsichord. The musical instrument 400 may have a wooden soundboard, and is not limited to the above-mentioned musical instruments.

The exciter 300 is an exciter (exciter) that can be attached to the musical instrument 400. The exciter 300 is detachably provided on the musical instrument 400. For example, the exciter 300 can be attached to the musical instrument 400 by using a clip or the like. At the time of adjustment, the user attaches the exciter 300 to the instrument 400. When the adjustment is completed, the exciter 300 is removed from the instrument 400.

The exciter 300 vibrates the contact surface. As a result, the wooden soundboard of the musical instrument 400 vibrates, and the musical instrument 400 generates sound. That is, the musical instrument 400 is a vibrated body that is vibrated by the exciter 300.

The adjusting device 100 includes a spectrum analyzer 101, a sound source 102, a first equalizer 103, a second equalizer 104, an amplifier 105, and a controller 106. Further, the adjusting device 100 may be connected to the external control terminal 200. The adjusting device 100 is not limited to a physically single device. For example, each component of the adjusting device 100 may be a single device, or two or more may be combined to form a single device.

The sound source 102 is a music player and outputs a sound source signal for vibrating the exciter 300. The sound source 102 is, for example, an analog audio device such as a CD (Compact Disc) player or a digital audio device such as an mp3 (MPEG Audio Layer-3) player. The sound source signal is, for example, a reproduction signal for reproducing an adjusted sound such as white noise. White noise is noise in which each band level is flat (almost equivalent).

The sound source signal from the sound source 102 is input to the first equalizer 103. The first equalizer 103 adjusts the frequency characteristics of the sound source signal according to the characteristics of the exciter. For example, the first equalizer 103 is a 31-band equalizer, and its characteristics can be adjusted independently for each band. That is, the first equalizer 103 adjusts the amplitude characteristic and the phase characteristic of the sound source signal. The first equalizer 103 outputs the adjusted sound source signal to the second equalizer 104.

The second equalizer 104 changes the frequency characteristic of the sound source signal from the first equalizer 103 and outputs it to the exciter 300. For example, the second equalizer 104 is a 31-band equalizer like the first equalizer 103. The characteristics of the second equalizer 104 can be adjusted independently for each band. That is, the first equalizer 103 adjusts the amplitude characteristic and the phase characteristic of the sound source signal. The second equalizer 104 may be an equalizer of the same type as the first equalizer 103, or may be an equalizer of a different type. Further, the first equalizer 103 and the second equalizer 104 may be graphic equalizers.

The sound source signal adjusted by the second equalizer 104 is input to the exciter 300 via the amplifier 105. That is, the amplifier 105 amplifies the sound source signal from the second equalizer 104 and outputs it to the exciter 300. The exciter 300 vibrates based on the sound source signal. The exciter 300 vibrates the instrument 400 using the sound source signal from the second equalizer 104. By doing so, the musical instrument 400 to which the exciter 300 is attached generates a sound corresponding to the sound source signal. The sound generated by the musical instrument 400 due to the vibration from the exciter 300 is used as the adjustment sound.

The spectrum analyzer 101 analyzes the spectrum of the adjusted sound generated by the musical instrument 400 due to the vibration of the exciter 300. The spectrum analyzer 101 includes a microphone and collects the adjustment sound from the musical instrument 400. Then, the spectrum analyzer 101 spectrum-analyzes the picked-up adjusted sound. Thereby, the frequency characteristic of the adjustment sound (resonant sound) of the musical instrument 400 can be obtained. That is, the spectrum analyzer 101 obtains the spectral waveforms of the amplitude characteristic and the phase characteristic of the adjusted sound. The spectrum analyzer 101 is, for example, an RTA (Real Time Analyzer), and obtains a frequency characteristic, that is, a spectrum waveform in real time. The RTA 101 outputs the frequency characteristic of the adjusted sound to the controller 106.

The controller 106 is a main control unit that controls each component of the adjusting device 100. The controller 106 is, for example, an MCU (Micro Control Unit) or the like, and operates by a software program, a hardware circuit, or a combination thereof. Specifically, the controller 106 outputs a command for adjusting each band level of the first equalizer 103 and the second equalizer 104.

The controller 106 controls the first equalizer 103 so as to cancel the influence of the frequency characteristic of the exciter 300. The controller 106 is preset with a set value that cancels the frequency characteristic of the exciter 300. The controller 106 outputs a command according to the set value to the first equalizer 103. Specifically, the controller 106 sets the amplitude characteristic of the exciter 300 and the opposite phase of the phase characteristic in the first equalizer 103. For example, when the amplitude characteristic and the phase characteristic of the exciter 300 are known, the controller 106 sets the known amplitude characteristic and the opposite phase of the phase characteristic in the first equalizer 103.

When the amplitude characteristic and the phase characteristic of the exciter 300 are not known, the frequency characteristic of the exciter 300 can be obtained in advance by measurement. Specifically, the exciter 300 is vibrated independently by using white noise. That is, white noise is output to the exciter 300 to which the musical instrument 400 is not attached. The spectrum analyzer 101 analyzes the sound generated by the exciter 300 due to white noise. Thereby, the adjusting device 100 can obtain the frequency characteristic, that is, the amplitude characteristic and the phase characteristic of the exciter 300.

White noise is noise in which each band level is flat (almost equivalent). Therefore, when the frequency characteristic of the exciter 300 is canceled by the first equalizer 103, the frequency characteristic of the vibrato sound should be logically flat. However, the musical instrument immediately after completion has various unstable elements. Examples of unstable factors include the degree of drying of the material (wood), the degree of aging, uneven application of the adhesive, and the degree of adhesion between the materials. Therefore, since the frequency characteristics of the vibrato do not match due to actual individual differences, aging is performed to cancel the unstable element.

The controller 106 controls the second equalizer 104 based on the spectrum analysis result of the adjusted sound. For example, the controller 106 controls the second equalizer 104 based on the frequency characteristics of the adjusted sound acquired by the spectrum analyzer 101. The controller 106 controls the second equalizer so that the frequency characteristic of the adjusted sound becomes flat. The controller 106 calculates the difference until the spectral waveform of the adjusted sound becomes flat, and outputs a command for adjusting each band to the second equalizer 104. For example, the second equalizer 104 adjusts the amplitude level and phase for each band. As a result, the resonance sound wave shape generated by the musical instrument 400 is automatically adjusted repeatedly until it becomes flat.

The controller 106 adjusts the second equalizer 104 so that the resonant sound wave shape of the instrument 400 is flat. For example, the frequency amplitude characteristic (amplitude spectrum) of the resonance sound becomes flat. Of course, the frequency response of the adjusted sound does not have to be completely flat. That is, the second equalizer 104 may adjust each band so that the frequency characteristic of the adjusted sound becomes flat within a range having a certain allowable value.

The spectrum analyzer 101 updates the frequency characteristics of the adjusted sound from time to time. The controller 106 controls the second equalizer 104 with settings according to the latest frequency characteristics. The controller 106 feedback-controls the second equalizer 104 according to the analysis result of the spectrum analyzer 101. The adjustment is completed when the exciter 300 vibrates the instrument 400 for a certain period of time. It becomes possible to perform aging for a certain period of time while maintaining the flat state of the resonant sound wave type.

Further, an external control terminal 200 may be connected to the adjusting device 100. The external control terminal 200 is a smartphone, a tablet computer, or the like, and can control the adjusting device 100. For example, the external control terminal 200 stores an application program (application) for controlling the adjusting device 100. The user can set the vibration time and the like by operating the touch panel or the like of the external control terminal 200. Further, the external control terminal 200 may supply the sound source signal to the adjusting device 100. The connection between the adjusting device 100 and the external control terminal 200 may be a wired connection or a wireless connection such as Bluetooth (registered trademark).

In this embodiment, the exciter 300 directly vibrates the wooden musical instrument 400. The second equalizer 104 controls the output level of each frequency band (band). As a result, the vertical crystallization between the wood fiber and the wood fiber adjacent thereto can be promoted, and the horizontal connection can be broken. The resonance strength of a desired frequency can be adjusted, and the natural timbre of the wooden musical instrument 400 can be adjusted and stabilized. The exciter 300 vibrates the instrument 400 by the sound source signals adjusted by the first equalizer 103 and the second equalizer 104. The adjustment sound generated by the musical instrument 400 has a uniform frequency amplitude characteristic. As a result, the entire band can be vibrated simultaneously and uniformly. A high-quality musical instrument 400 can be provided.

Further, since the exciter 300 is directly attached to the musical instrument 400, the vibration conductivity is high and aging can be performed with high work efficiency. Therefore, the working time can be shortened. Since the exciter 300 directly vibrates the woody portion of the musical instrument 400, the vibration efficiency applied to the woody portion is good, and the drying of the woody portion can be promoted. It is possible to reduce the uneven application of the adhesive of the parts and the influence of the uneven adhesion.

Since it is not necessary for a person to play the musical instrument 400, labor saving can be achieved. Further, by using the external control terminal 200, full automation becomes possible. By operating the external control terminal 200, the user can input settings such as aging time and volume. Then, the controller 106 controls the sound source 102, the second equalizer 104, and the like according to the settings. As a result, aging for a certain period of time can be automatically performed.

By incorporating the adjustment method using the adjustment device 100 into the manufacturing process of the musical instrument 400 as an aging process, the production efficiency of the musical instrument 400 can be significantly improved. Since all bands can be oscillated at the same time, more delicate tuning becomes possible. Therefore, the productivity of the high quality musical instrument 400 can be improved.

(Mounting position of exciter 300)
An example of the mounting position of the exciter 300 with respect to the musical instrument 400 will be described with reference to FIGS. 2 and 3. FIG. 2 is a schematic view of the musical instrument 400 viewed from the front, and FIG. 3 is a schematic view of the musical instrument 400 viewed from the side. Here, an example in which a wooden stringed instrument such as an acoustic guitar is used as the musical instrument 400 is shown.

First, the configuration of the musical instrument 400 will be described. The musical instrument 400 includes a body 410, strings 405, a neck 407, and the like. The body 410 is a resonance box in which the vibration (sound) of the strings 405 resonates. The body 410 includes a front plate (top) 401, a side plate (side) 402, and a back plate (back) 403. A sound hole (sound hole) 409 is provided on the front plate 401. The front plate 401, the side plate 402, and the back plate 403 serve as a wooden soundboard. Resonant sound from the space surrounded by the front plate 401, the side plate 402, and the back plate 403 is emitted from the sound hole 409 to the external space.

A neck 407 is attached to the body 410. The neck 407 has a fingerboard or the like for the user to press the strings with his / her fingers. The heel 408 is a joint portion that joins the neck 407 to the body 410, and is fixed to the side plate 402. A string 405 is stretched along the neck 407. The front plate 401 is provided with a bridge 404 for fixing one end of the string 405. String 405 extends from bridge 404 across sound hole 409 to neck 407.

Here, two exciters 300a and 300b are attached to the musical instrument 400. Each of the exciters 300a and 300b has a circular contact surface. Exciters with a diameter of 63 mm and a height of 27 mm manufactured by JVC KENWOOD Corporation are used as exciters 300a and 300b. The exciters 300a and 300b have a rated impedance of 4Ω, a rated input of 15W, and a maximum input of 20W. Hereinafter, the mounting positions of the exciters 300a and 300b will be described.

The exciter 300a is provided in the vicinity of the bridge 404. Specifically, in front view, the exciter 300a is arranged on an extension of the string 405. That is, the exciter 300a is arranged on the side opposite to the neck 407 side of the bridge 404. The exciter 300a is attached to the front plate 401 around the bridge 404. The exciter 300a directly vibrates the front plate 401. That is, the contact surface between the exciter 300a and the front plate 401 vibrates in response to the sound source signal. The vibration of the exciter 300a causes the sound to resonate within the body 410. The resonance sound resonating in the body 410 is emitted from the sound hole 409 as an adjustment sound.

The exciter 300a is preferably arranged in the vicinity of the position where the string 405 is fixed. That is, the exciter 300a is preferably arranged adjacent to the bridge 404. In the case of a guitar, the exciter 300a is arranged near the bridge. In the case of a violin or the like, the exciter 300a is arranged in the vicinity of the tuning adjuster. By doing so, the exciter 300 can effectively vibrate the instrument 400. Since the front plate 401, which is a wooden soundboard, can be vibrated efficiently, aging can be performed with high work efficiency.

The exciter 300b is attached to the back plate 403 in the vicinity of the neck 407. Specifically, the exciter 300b is attached at a position overlapping the neck 407 in front view. Here, the exciter 300b is attached to the back plate 403 in the vicinity of the heel 408. The exciter 300b directly vibrates the back plate 403. That is, the contact surface between the exciter 300b and the back plate 403 vibrates in response to the sound source signal. The vibration of the exciter 300b causes the sound to resonate within the body 410. The resonance sound resonating in the body 410 is emitted from the sound hole 409 as an adjustment sound.

As described above, the exciter 300b is preferably arranged at a position overlapping the neck 407 in the front view. By doing so, the exciter 300 can effectively vibrate the instrument 400. Since the back plate 403 can be vibrated efficiently, aging can be performed with high work efficiency.

The exciter 300a and the exciter 300b may vibrate the musical instrument 400 at the same time, or may vibrate the instrument 400 separately. When vibrating at the same time, the sound source signals from the second equalizer 104 are simultaneously input to the exciter 300a and the exciter 300b. That is, the output from the second equalizer 104 is branched and supplied to the exciter 300a and the exciter 300b, respectively.

FIG. 4 is a diagram showing another example of the mounting position of the exciter 300b. FIG. 4 is a schematic view of the musical instrument 400 as viewed from the side. In FIG. 4, the exciter 300b is attached to the side plate 402 in the vicinity of the neck 407. Specifically, the exciter 300b is arranged in the vicinity of the heel 408. In this case as well, the same effect as in FIGS. 2 and 3 can be obtained.

Of course, the number of exciters 300 is not limited to 2, and may be 1 or 3 or more. Further, the position of the exciter 300 is not limited to the positions shown in FIGS. 2 to 4. The route for transmitting vibration to the soundboard and the resonance box differs depending on the musical instrument 400. Therefore, it is preferable to optimize the number, size, rated output, installation position, etc. of the exciter 300 to be used according to the musical instrument 400.

Embodiment 2.
In the second embodiment, the adjusting device 100 tunes the musical instrument 400. Specifically, the adjusting device 100 adjusts the timbre of the musical instrument 400 so that the timbre of the musical instrument 400 becomes the timbre of the user's preference. Since the configuration of the adjusting device 100 is the same as that of the first embodiment, the description thereof will be omitted as appropriate.

First, pre-measurement is performed to determine the user's favorite timbre. Specifically, the sound source 102 shown in FIG. 1 outputs a reproduction signal of music (musical piece) familiar to the user as a sound source signal. The first equalizer 103 has the same settings as in the first embodiment. That is, the first equalizer 103 cancels out the frequency characteristics of the exciter 300. The second equalizer 104 is the initial setting.

When the exciter 300 vibrates the musical instrument 400, music corresponding to the reproduction signal is reproduced. The user changes the setting of the second equalizer 104 while listening to the reproduced sound (musical piece), and adjusts to a desired tone color. That is, the user adjusts the second equalizer 104 with the music that he / she is accustomed to listening to to bring the music closer to his / her favorite tone. The spectrum analyzer 101 obtains the frequency characteristics of the reproduced sound in the desired tone color.

The controller 106 sets the reference characteristic based on the frequency characteristic of the reproduced sound acquired by the spectrum analyzer 101. That is, the reference characteristic indicates a tuning reference in which the amplitude and the like of each band are tuned so as to obtain the tone color desired by the user. The reference characteristic may be set based on the adjustment result of the second equalizer 104 in the preliminary measurement, not on the frequency characteristic of the reproduced sound. The controller 106 stores the reference characteristic in a memory or the like.

After the completion of the pre-measurement, adjustment using white noise as the sound source signal is performed as in the first embodiment. The controller 106 controls the second equalizer 104 based on the frequency characteristics acquired by the spectrum analyzer 101. Here, the controller 106 changes the setting of the second equalizer 104 based on the reference characteristic. The controller 106 controls the second equalizer 104 so that the frequency characteristic of the adjusted sound approaches a preset reference characteristic. The controller 106 calculates the difference until the spectral waveform of the adjusted sound becomes the reference characteristic, and outputs a command for adjusting each band to the second equalizer 104. For example, the second equalizer 104 adjusts the amplitude level for each band. As a result, the resonant sound wave shape generated by the musical instrument 400 is automatically adjusted repeatedly until it meets the reference characteristics.

The controller 106 adjusts the second equalizer 104 so that the resonant sound wave shape of the musical instrument 400 becomes a reference characteristic. As a result, the frequency amplitude characteristic (amplitude spectrum) of the resonant sound is tuned according to the user's preference. Of course, the frequency characteristics of the adjusted sound do not have to completely match the reference characteristics. That is, the second equalizer 104 may adjust each band so that the frequency characteristic of the adjusted sound matches the reference characteristic within a range having a certain allowable value.

The spectrum analyzer 101 updates the frequency characteristics of the adjusted sound from time to time. The controller 106 controls the second equalizer 104 according to the latest frequency characteristics. The controller 106 feedback-controls the second equalizer 104 according to the analysis result of the spectrum analyzer 101. As a result, the resonant sound wave shape generated by the musical instrument 400 is automatically adjusted to match the reference characteristic. It may end when the frequency characteristic of the adjustment sound matches the reference characteristic.

By doing so, the timbre of the musical instrument 400 can be adjusted according to the user's preference. Since the exciter 300 is used, adjustment can be easily performed as in the first embodiment. Since the resonance strength of the desired frequency can be adjusted according to the user's preference, more delicate tuning becomes possible. The above tuning process may be incorporated into the manufacturing process. The musical instrument 400 can be manufactured according to the user's preference.

In the above description, the reference characteristic is obtained according to the preliminary measurement, but the method for obtaining the reference characteristic is not particularly limited. For example, the most preferable setting may be selected from among the user auditioning with a plurality of settings. Then, the reference characteristic may be determined from the setting selected by the controller 106. Alternatively, the external control terminal 200 may acquire the reference characteristic from another device. The sound source 102 may be connected to the outside of the adjusting device 1.

Part or all of the above processing may be executed by a computer program. The programs described above can be stored and supplied to a computer using various types of non-transitory computer readable media. Non-transient computer-readable media include various types of tangible storage media. Examples of non-temporary computer-readable media include magnetic recording media (eg, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg, magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (Random Access Memory)) are included. The program may also be supplied to the computer by various types of temporary computer readable media. Examples of temporary computer-readable media include electrical, optical, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

Although the invention made by the present inventor has been specifically described above based on the embodiment, the present invention is not limited to the above embodiment and can be variously modified without departing from the gist thereof. Needless to say. It is also possible to appropriately combine two or more of the above embodiments.

100 Adjustment device 101 Spectrum analyzer 102 Sound source 103 1st equalizer 104 2nd equalizer 105 Amplifier 106 Controller 200 External control terminal 300 Exciter 400 Musical instrument 401 Front plate 402 Side plate 403 Back plate 404 Bridge 405 String 407 Neck 408 Heel 409 Sound hole 410

Claims (9)

An adjustment device that adjusts the tone of an instrument with a wooden soundboard.
A sound source that outputs a sound source signal for vibrating the exciter attached to the musical instrument, and
A first equalizer that changes the frequency characteristics of the sound source signal according to the characteristics of the exciter, and
A second equalizer that changes the frequency characteristics of the sound source signal from the first equalizer and outputs it to the exciter, and
A spectrum analyzer that analyzes the spectrum of the adjusted sound generated by the instrument due to the vibration of the exciter, and
An adjusting device including a controller that controls the second equalizer according to the analysis result of the spectrum. The spectrum analyzer determines the frequency characteristics of the adjusted sound,
The adjusting device according to claim 1, wherein the controller controls the second equalizer so that the frequency characteristic of the adjusting sound becomes flat. The spectrum analyzer determines the frequency characteristics of the adjusted sound,
The adjusting device according to claim 1, wherein the controller controls the second equalizer so that the frequency characteristic of the adjusting sound approaches a preset reference characteristic. The adjusting device according to any one of claims 1 to 3, wherein the first equalizer changes the frequency characteristic of the sound source signal so as to cancel the frequency characteristic of the exciter. The adjusting device according to any one of claims 1 to 4, wherein two exciters are attached to the musical instrument. The instrument is a stringed instrument
The adjusting device according to any one of claims 1 to 5, wherein the exciter is attached in the vicinity of a position where the strings are fixed. The instrument is a stringed instrument having strings provided along the neck.
The adjusting device according to any one of claims 1 to 6, wherein the exciter is attached in the vicinity of the neck. An adjustment method that adjusts the tone of an instrument that has a wooden soundboard.
A step of outputting a sound source signal for vibrating the exciter attached to the musical instrument, and
The step that the first equalizer changes the frequency characteristic of the sound source signal according to the characteristic of the exciter,
A step in which the second equalizer changes the frequency characteristics of the sound source signal from the first equalizer and outputs the sound source signal to the exciter.
A step of analyzing the spectrum of the adjustment sound generated by the instrument due to the vibration from the exciter, and
An adjustment method including a step of controlling the second equalizer according to the analysis result of the spectrum. A method for manufacturing a musical instrument, which comprises a step of aging or tuning the musical instrument according to the adjustment method according to claim 8.

Images