WO2016152219A1

WO2016152219A1 - Instrument and method capable of generating additional vibration sound

Info

Publication number: WO2016152219A1
Application number: PCT/JP2016/051596
Authority: WO
Inventors: 晋吾江國; ライル，マーカス
Original assignee: ヤマハ株式会社
Priority date: 2015-03-24
Filing date: 2016-01-20
Publication date: 2016-09-29

Abstract

The present invention is provided with: a pickup 11 which acquires an electrical sound signal according to the playing sound of a musical instrument; an effector 12 which imparts an effect on the electrical sound signal acquired by the pickup; and a vibrator 14 which generates mechanical vibration according to the effect-imparted sound signal and is mounted on the body of the musical instrument such that the mechanical vibration is delivered to the body. The effect is imparted on the electrical sound signal according to the playing sound of the musical instrument, the vibrator is driven by the effect-imparted sound signal, the mechanical vibration sound is accordingly generated from the body of the musical instrument to thereby become an additional vibration sound for the playing sound, and therefore an unprecedented experience can be derived from the playing of the musical instrument. Since an effect-imparted sound is used instead of the actual playing sound as the additional vibration sound, howling of the musical instrument playing sound can be restricted or reduced.

Description

Musical instrument and method capable of generating additional vibration sound

The present invention relates to a musical instrument capable of generating additional vibration sound and a method for adding additional vibration sound in a musical instrument, and more particularly, to a machine of a musical instrument (for example, an acoustic guitar) using a vibrator (electric / vibration transducer). The present invention relates to a technique for generating an additional vibration sound by giving a dynamic vibration.

A technique for generating mechanical vibration sound from a soundboard by attaching a voice coil type actuator (speaker) to the soundboard of a piano and transmitting the physical vibration of the actuator to the soundboard is known. (For example, Patent Documents 1 and 2 below). In this technique, the sound source of the electrical waveform signal supplied to the actuator is an electronic sound source, not a live sound played on a piano. That is, a configuration in which a certain key of a piano is turned on, an electrical waveform signal having a pitch corresponding to the turned on key is generated from an electronic sound source, and an actuator is driven by the electrical waveform signal It is. Therefore, there is no need to consider the problem such as howling caused by the feedback of the live performance sound to the mechanical vibration sound loop by the actuator.

Japanese Patent Application Laid-Open No. 2004-228561 electrically picks up string vibration in a stringed instrument such as a guitar, amplifies the picked-up string vibration signal, and drives an actuator with the string vibration signal to drive mechanical vibration sound from the instrument body. Is disclosed. However, there is a howling problem that occurs when a played string vibration signal is fed back to a mechanical vibration sound loop by an actuator. In Patent Document 3, such a problem of howling has not been considered. On the other hand, in Patent Document 3, signal processing for changing the pitch (pitch) of a picked-up string vibration signal is performed, and an actuator is driven by the signal-processed electrical vibration signal to thereby remove the instrument body. It is also disclosed to generate mechanical vibration sound with controlled tonality. However, since the signal processing shown in Patent Document 3 is mainly intended to generate a sound having a tone (pitch or pitch) different from that of string vibration sound by body vibration, it is necessary to consider the problem of howling. Therefore, it did not teach a solution to howling.

On the other hand, a ceramic speaker is known as a compact vibration device. For example, the ceramic speaker is attached to a hard object, and the vibration sound is generated by vibrating the object (for example, the following non-patent document). 1). To the best of Applicants' knowledge, there are no precedents for using such ceramic speakers as mechanical vibration sources for musical instruments. However, in consideration of prior arts such as Patent Documents 1 and 2 applied to a piano, a compact vibration device such as the ceramic speaker can be applied to a relatively small musical instrument such as a guitar. It seems to be suitable to do. In Patent Document 4, the game device generates and generates a sound signal in parallel with a first sound signal subjected to effect processing and a second sound signal not subjected to effect processing, based on the same sound data. Is disclosed. However, there is no suggestion of applying such effect processing for adding mechanical vibration sound in musical instruments.

Japanese National Publication No. 4-500735 International Publication No. WO2013 / 089239 JP 2003-295865 A JP 2014-057809 A

By the way, the use of a dedicated electronic sound source as shown in Patent Documents 1 and 2 as the source of the electrical waveform signal supplied to the vibration device leads to an increase in cost, thus providing inexpensive equipment. It is not preferable when planning things. In addition, there is a disadvantage that subtleties in the actual musical instrument performance sound are not reflected in the mechanical vibration sound. Therefore, it is advantageous in terms of cost to detect the live performance sound of an instrument such as a guitar with a pickup and use it as a source of an electrical waveform signal supplied to the vibration device, and also to play an actual instrument performance. It is also advantageous to reflect the subtleties in the sound in the mechanical vibration sound. However, in this case, there arises a problem such as howling that occurs when the musical instrument performance sound is fed back to the mechanical vibration sound loop by the vibration exciter.

The present invention has been made in view of the above points, is inexpensive, can generate subtle effects in actual musical instrument performance sounds, and generates additional vibration sounds that can solve problems such as howling. Provide and use possible musical instruments and methods.

The musical instrument according to the present invention includes a pickup that acquires an electrical sound signal corresponding to a performance sound of the musical instrument, an effector that applies an effect to the electrical sound signal acquired by the pickup, and a sound that is subjected to the effect And a vibration exciter attached to the instrument body so as to generate a mechanical vibration in response to the signal and transmit the mechanical vibration to the instrument body.

According to the present invention, an effect is applied to the electrical sound signal corresponding to the performance sound of the musical instrument, and the vibrator is driven by the sound signal to which the effect is applied, and the mechanical vibration sound corresponding to this is generated. It is generated from the body of the instrument, and this becomes an additional vibration sound to the performance sound, and you can experience an unprecedented performance feeling. In this way, the electrical sound signal according to the performance sound of the musical instrument is used as the sound source of the exciter, so a dedicated electronic sound source is unnecessary, it is inexpensive, and the subtlety of the actual musical instrument performance sound is utilized. Mechanical vibration sound can be generated from the body of the instrument. Moreover, howling with respect to the performance sound of a musical instrument can be suppressed or reduced by vibrating an exciter with an effect sound and generating an additional vibration sound. Further, in addition to the performance sound of the musical instrument, additional vibration sound is generated from the body of the musical instrument, so that even if the user is not skilled in the musical instrument or cannot perform with sufficient strength, the overall performance volume You can experience a good feeling of performance.

The block diagram which shows one Example of this invention in an acoustic guitar. The block diagram which shows the various modifications with respect to FIG.

In the embodiment shown in FIG. 1, the musical instrument 10 is an acoustic guitar, and is equipped with a pickup 11 for picking up vibrations of the strings of the acoustic guitar. An electrical sound signal corresponding to the performance sound of the musical instrument 10 is acquired by the pickup 11. The output of the pickup 11 is supplied to the effector 12. The effector 12 performs an effect process on the electrical sound signal acquired by the pickup 11 to generate a sound signal (so-called wet sound) subjected to a musical or acoustic effect. As the effector 12 itself, a known effect processing circuit may be appropriately used. For example, the effector 12 allows the user to select any type of effect from among multiple types of effects such as distortion, wah wah, reverb, echo, flanger, etc., and adjusts the degree (parameter) of the selected effect by user operation. It may be configured to be able to. The output signal of the effector 12 may be configured such that an electrical signal (so-called dry sound) generated by the pickup 11 is mixed with a wet sound generated by the effector 12 at an arbitrary ratio.

The electric sound signal to which the effect is applied is input to a vibrator (electric / vibration transducer) 14 through an amplifier 13. The vibrator 14 generates a mechanical vibration corresponding to the electric sound signal (wet sound) to which the effect is applied, and transmits the mechanical vibration to the body of the musical instrument 10 so as to transmit the mechanical vibration to the body 10a. It is attached to the appropriate place (resonance drum of acoustic guitar). As an example, the vibrator 14 may be attached to the inner surface of the guitar body 10a. Further, all circuit elements from the effector 12 to the vibrator 14 may be housed in the body 10a. As the vibrator 14, a known voice coil type or any other type of electric / vibration transducer may be used.

In the above configuration, when the user plays the musical instrument (guitar) 10 after selecting and setting the desired effect and its parameters in the effector 12, a live performance sound is generated from the musical instrument (guitar) 10 at the same time. An electrical sound signal corresponding to the performance sound is acquired by the pickup 11, an effect is applied by the effector 12, and the vibrator 14 is driven by the sound signal to which the effect is applied, and mechanical vibration corresponding to the effect is applied. Sound is generated acoustically from the body 10 a of the musical instrument (guitar) 10. Thereby, the mechanical vibration sound (additional vibration sound) to which the effect generated acoustically from the body 10a is applied is added to the live performance sound, and an unprecedented performance feeling can be experienced. .

In this way, since an electrical sound signal corresponding to the performance sound of the musical instrument (guitar) 10 is used as the sound source of the vibrator 14, it is inexpensive because a dedicated electronic sound source is unnecessary, and the actual performance of the musical instrument is performed. A mechanical vibration sound can be generated from the body (soundboard) 10a of the musical instrument (guitar) 10 by taking advantage of the subtleties in the sound. Further, since the mechanical vibration sound is generated based on the sound signal to which the effect is applied, the howling with respect to the performance sound can be reduced by exhibiting characteristics different from the performance sound of the musical instrument (guitar) 10. . Therefore, by increasing the ratio of the wet sound in the sound signal to which the effect output from the effector 12 is applied, the howling suppression effect on the performance sound can be enhanced. In particular, driving the exciter 14 with an effect sound signal including only a wet sound that does not include a dry sound greatly contributes to suppressing howling of the performance sound. Furthermore, in addition to the performance sound of the musical instrument, additional vibration sound is generated from the body of the musical instrument, so that a user who is not skilled in the musical instrument (guitar) 10 or a user who cannot perform with sufficient strength (for example, a young person) Even so, it is possible to experience a good performance experience by increasing the overall performance volume.

FIG. 2 shows various modifications to the embodiment of FIG. As one form of the modified example, a mixing circuit 15 may be inserted between the effector 12 and the amplifier 13. The mixing circuit 15 mixes an output signal from the effector 12 and an arbitrary electrical sound signal from the external input terminal 16. As a result, the vibrator 14 can be driven not only by the output signal from the effector 12 but also by any electrical sound signal input from the external input terminal 16. In this case, if the user inputs an electric sound signal of melody or harmony or rhythm related to a song played on the musical instrument (guitar) 10 from the external input terminal 16, an ensemble with the performance sound of the musical instrument (guitar) 10 is 1 This can be realized with a musical instrument (guitar) 10 on a table. As an option of this modification, a switch 17 may be provided between the effector 12 and the mixing circuit 15. In this case, by turning off the switch 17, the vibrator 14 can be driven only by an arbitrary electrical sound signal input from the external input terminal 16.

As another form of the modified example, a known feedback canceller 18 may be inserted at an appropriate location on the path from the pickup 11 to the vibrator 14. In this case, since the frequency characteristic to be fed back is predicted to change due to the change in characteristics due to the usage environment and / or aging, an adaptive feedback canceller may be used. That is, in such an adaptive feedback canceller, a frequency component having a peak level that is likely to cause howling among frequency components in a signal passing through the feedback loop is detected in real time, and the level of the detected frequency component is suppressed. And adaptive filter processing (equalizing). As another example of the feedback canceller 18, the phase of the electric sound signal to be input is inverted before being input to the vibrator 14, and thus the vibrator 14 is vibrated by the inverted electric sound signal. It may be adopted. As a further form of the modification, an equalizer (not shown) may be inserted at an appropriate location on the path from the pickup 11 to the vibrator 14. For example, when the pickup 11 performs pickup by amplifying a sound signal with a different characteristic for each of a plurality of different sound ranges (for each string), the amplitude characteristic for each sound range is equalized by an equalizer and then excited. Preferably, the device 14 is driven. In addition, the equalizer can be advantageously used when the vibrator 14 is driven by a signal whose amplitude characteristics are controlled according to the frequency band.

As yet another form of the modification, a display 20 (for example, a portable terminal) capable of wirelessly or wiredly communicating with the effector 12 is provided, and the type of the effect currently selected by the effector 12 and You may make it display the effect degree etc. on the display 20 with a character and / or a figure etc. visually. As an option in that case, the display 20 is configured to have a touch panel GUI (graphical user interface) function so that the effect can be selected and the parameters adjusted and set by the effector 12 using the GUI. Also good.

In the various forms of the above-described modification, only one of them may be applied, or a plurality of modifications may be applied in combination. The circuit elements constituting the embodiments and modifications of the present invention described above may be constituted by a dedicated discrete circuit, IC, LSI (integrated circuit), DSP (digital signal processor), or the like, or a computer Alternatively, some or all of the functions that can be processed using the processor unit (CPU) may be implemented by a computer or a processor unit. When a computer or a processor unit is used, a memory for storing a program for realizing at least a part of functions in the above-described embodiments and modifications of the present invention and a memory for data storage or working are provided. It is done.

The type of the musical instrument 10 to which the present invention can be applied is not limited to the above-described acoustic guitar, but includes string instruments such as ukuleles, basses, violins, and cellos, as well as wind instruments, percussion instruments, pianos, and the like. May be any type of musical instrument. Moreover, not only a natural musical instrument but an electronic musical instrument having an electronic sound source may be used. The pickup 11 may have any configuration as long as it is configured to acquire an electrical sound signal corresponding to the performance sound of the musical instrument, and depending on the type of musical instrument to be applied, For example, an electromagnetic pickup, a piezo pickup, a small microphone, or the like can be used as appropriate.

Also, the musical instrument 10 may be of a type that can automatically perform an appropriate performance of music by automatically driving a performance operator like a piano. In that case, it is only necessary to pick up the performance sound generated by the automatic performance and excite the exciter by a signal obtained by applying an effect to the picked-up automatic performance sound signal. In that case, the display 20 having a touch panel GUI function as shown in FIG. 2 or other appropriate controller may be used to select and control the music to be played automatically (effect selection and setting controller and Sharing).

Claims

A pickup that obtains an electrical sound signal according to the performance sound of the instrument;
An effector for applying an effect to the electrical sound signal acquired by the pickup;
An instrument comprising: an exciter attached to a body of the instrument so as to generate mechanical vibration according to the sound signal to which the effect is applied and to transmit the mechanical vibration to the body of the instrument.
The instrument according to claim 1, wherein the effector is configured to output a signal consisting only of a wet sound signal to which an effect is applied as a sound signal to which the effect is applied.
The effector is configured to output a signal obtained by mixing a wet sound signal to which an effect has been applied to a dry sound signal to which an effect has not been applied at an arbitrary ratio, as a sound signal to which the effect has been applied. The instrument of claim 1.
The musical instrument according to any one of claims 1 to 3, wherein the musical instrument is a musical instrument having a resonant body, and the body is the resonant body.
The musical instrument according to any one of claims 1 to 3, wherein the musical instrument is a piano and the body is a soundboard of the piano.
The musical instrument according to any one of claims 1 to 5, further comprising a feedback canceller inserted at an appropriate position in a path from the pickup to the vibrator.
Obtaining an electrical sound signal corresponding to the performance sound of the instrument;
Applying an effect to the acquired electrical sound signal;
Generating mechanical vibration according to a sound signal to which the effect is applied by a vibrator attached to a body of the instrument, and according to the mechanical vibration generated by the vibrator A method comprising generating a vibration sound from a body of the instrument.