JP5862524B2 - Keyboard instrument - Google Patents

Description

  The present invention relates to a technique for changing the sound of a keyboard instrument.

  In electronic pianos, electronic sounds are generally generated from speakers. In order to generate not only this electronic sound but also a rich bass, an electronic piano may be provided with a soundboard. In this case, for example, Patent Literature 1 discloses a technique for radiating sound from a soundboard by attaching the speaker to the soundboard and vibrating the soundboard with the speaker. It is also disclosed that this technique is applicable not only to an electronic piano but also to a mute piano configured not to vibrate strings.

JP 2008-292739 A

The sound quality of an acoustic piano depends largely on the vibration characteristics of the soundboard that emits sound. When a speaker is attached to a soundboard of an acoustic piano and the soundboard is vibrated, the soundboard may resonate at a specific frequency depending on the attachment position. In this case, the sound quality of the vibration sound from the speaker may change due to the resonance, or the string corresponding to the resonance frequency may vibrate, resulting in unintentional pronunciation.
For this reason, it is necessary to examine the mounting position in detail and mount the speaker at a position where resonance does not occur, or change the design of the soundboard itself to adjust the vibration characteristics. In addition, when the number of speakers to be attached increases, it may become very difficult to select the attachment position and design the soundboard.
The present invention has been made in view of the above-described circumstances, and has an object of controlling the influence of the sound characteristics of the soundboard on the sound quality in the case of attaching a vibration exciter for vibrating the soundboard. And

In order to solve the above-mentioned problems, the present invention relates to a key, a sounding body provided corresponding to the key, a hammer that strikes the sounding body in response to an operation of the key, and vibration of the sounding body. A sounding board that vibrates with the sounding board, and a vibration part that vibrates in accordance with an input drive signal, connected to the sounding board, and vibrates the sounding board by the vibration of the vibrating part; and A performance information output unit that outputs performance information corresponding to the operation; and a signal output unit that outputs the drive signal indicating a sound based on the performance information to the excitation unit, wherein the vibration unit includes the drive signal Is input and the voice signal is arranged on the magnetic path, and the drive signal is in accordance with the vibration characteristic of the soundboard specified based on the electromotive force generated at both ends of the voice coil due to the vibration of the soundboard. Keyboard music characterized by having a frequency characteristic To provide.

In a preferred embodiment, the keyboard instrument includes a voltmeter that measures a voltage generated at both ends of the voice coil due to vibration of the soundboard, and a frequency of the drive signal based on a voltage value output from the voltmeter. And a frequency characteristic specifying unit for specifying the characteristic .

In another preferred embodiment, the keyboard instrument includes a plurality of the excitation units respectively connected to the soundboard at different positions of the soundboard, and each of the plurality of excitation units includes the excitation unit. The drive signal input to the vibration part is a signal having a frequency characteristic corresponding to the vibration characteristic of the soundboard specified based on the electromotive force generated at both ends of the voice coil of the vibration part corresponding to the vibration part. It is characterized by.

In another preferred aspect, the drive signal is a signal having a frequency characteristic that suppresses resonance of the soundboard at a position where the excitation unit is connected to the soundboard .

In another preferred embodiment, the sound board is provided with a first piece and a second piece, and the keyboard instrument is connected to a position corresponding to the first piece of the sound board. The first excitation unit and the second excitation unit connected to a position corresponding to the second piece of the soundboard .

  According to the present invention, when a vibration unit that vibrates a soundboard is attached, it is possible to control and influence the influence of the vibration characteristics of the soundboard on the sound quality.

It is a perspective view which shows the external appearance of the grand piano in embodiment of this invention. It is a figure explaining the internal structure of the grand piano in embodiment of this invention. It is a figure explaining the position of the vibration part in embodiment of this invention. It is a figure explaining the external appearance of the vibration part in embodiment of this invention. It is sectional drawing of the vibration part seen from the arrow VV direction shown in FIG. It is a block diagram which shows the structure of the controller in embodiment of this invention. It is a block diagram which shows the function structure of the grand piano in embodiment of this invention. It is a figure explaining the adjustment aspect of the frequency characteristic in the equalizer part in embodiment of this invention. It is a figure for demonstrating the mechanism in which a specific frequency characteristic specific | specification part specifies the frequency characteristic which shows the adjustment aspect of the frequency characteristic with respect to the drive signal which the equalizer part in embodiment of this invention performs. It is sectional drawing of the vibration part in the modification 1 of this invention. It is a figure which shows the internal structure of the upright piano in the modification 2 of this invention. It is a figure explaining the position of the vibration part in the modification 2 of this invention. It is a figure explaining the state which attached the vibration part in the modification 3 of this invention to the sound board. It is a figure explaining the position of the vibration part in the modification 7 of this invention. It is a figure which shows the internal structure of the upright piano in the modification 7 of this invention. It is sectional drawing of the vibration part in the modification 12 of this invention.

<Embodiment>
[overall structure]
FIG. 1 is a perspective view showing an appearance of a grand piano 1 according to an embodiment of the present invention. The grand piano 1 is a keyboard instrument having a keyboard on which a plurality of keys 2 to be played by a performer are arranged on the front surface and a pedal 3. Moreover, the grand piano 1 has the control apparatus 10 which has the operation panel 13 in the front part, and the touch panel 60 provided in the music stand part. The user's instruction can be input to the control device 10 by operating the operation panel 13 and the touch panel 60.

The grand piano 1 is capable of sounding in a sounding mode according to a user instruction among a plurality of sounding modes. This sounding mode is a normal sounding mode in which sound is generated only by striking with a hammer in the same manner as a general grand piano, and striking with a hammer is prevented, and excitation is performed using a signal from a sound source unit such as an electronic sound source. The sound board is vibrated by the sounding part, so that the sound is emitted from the sound board with a lower sound than usual (may be louder) with a natural sound, and the sound is produced by striking in the same way as in the normal sound mode. In addition, there is a strong sound mode in which a sound is played with a louder sound than when a string is struck by a hammer (normal sound generation mode) by vibrating a soundboard by a vibration unit using a tone signal of a piano. In this strong sound mode, not only the volume is increased, but also the sound is produced by hammering the string, and the sounding board is made by the excitation unit using signals of sounds other than the piano (including sounds similar to the piano). It can also be used as a performance mode to obtain a timbre layer effect by simultaneously performing vibration and sounding.
Note that the sound generation mode includes other sound generation modes such as a mute mode in which the signal from the sound source unit is not used for vibration of the soundboard in the configuration of the weak sound mode but is not supplied to the outside by supplying it to the headphone terminal. May be present.
The sound generation modes are summarized as shown in Table 1 below.

  Moreover, in the grand piano 1, operation | movement by the performance mode according to a user's instruction | indication is possible among several performance modes. This performance mode includes a normal performance mode in which a user performs a performance operation and generates a sound, and an automatic performance mode in which a key is automatically driven to generate a sound. Note that either one of the performance modes may not exist.

[Configuration of Grand Piano 1]
FIG. 2 is a diagram illustrating the internal structure of the grand piano 1 according to the embodiment of the present invention. In this figure, the configuration provided corresponding to each key 2 is shown by focusing on one key 2, and the description provided for the portions provided corresponding to the other keys 2 is omitted. Yes.

  Below the rear end side of each key 2 (the back side of the key 2 as viewed from the user who performs), when the performance mode is the automatic performance mode, a key drive unit 30 that drives the key 2 using a solenoid is provided. Is provided. The key drive unit 30 drives the solenoid in response to a control signal from the control device 10. The key drive unit 30 reproduces the same state as when the user pressed the key by driving the solenoid and raising the plunger, while the same state as when the user released the key by lowering the plunger To reproduce. As described above, the difference between the normal performance mode and the automatic performance mode is whether the key 2 is driven by a user operation or the key driving unit 30.

  The hammer 4 is provided corresponding to each key 2, and when the key 2 is pressed, a force is transmitted via an action mechanism (not shown) to move, and the string 5 corresponding to each key 2 is hit. Further, the damper 8 is brought into a non-contact state or a contact state with the string 5 in accordance with the depression amount of the key 2 and the depression amount of the damper pedal (hereinafter simply referred to as a damper pedal in the case of the pedal 3) among the pedals 3. . When the damper 8 is in contact with the string 5, the damper 8 suppresses vibration of the string 5.

  The stopper 40 is a member that prevents the hammer 4 from hitting the string 5 when the weak sound mode is set. That is, when the sound generation mode is set to the weak sound mode, the hammer shank collides with the stopper 40 to prevent the hammer 4 from striking the string 5, while when the normal sound generation mode is set, the stopper 40 is , It moves to the position where it doesn't collide with the hammer shank.

  The key sensor 22 is provided below each key 2, and outputs a detection signal corresponding to the behavior of the key 2 to the control device 10. In this example, the key sensor 22 detects the pressing amount of the key 2 and outputs a detection signal indicating the detection result to the control device 10. The key sensor 22 may output a detection signal indicating that the key 2 has passed a specific pressing position instead of outputting a detection signal corresponding to the pressing amount of the key 2. The specific pressing position is any position in the range from the rest position of the key 2 to the end position, and is preferably a plurality of positions. As described above, the detection signal output from the key sensor 22 may be any signal as long as it allows the control device 10 to recognize the behavior of the key 2.

  The hammer sensor 24 is provided corresponding to each hammer 4, and outputs a detection signal corresponding to the behavior of the hammer 4 to the control device 10. In this example, the hammer sensor 24 detects the moving speed of the hammer 4 immediately before striking the string 5 and outputs a detection signal indicating the detection result to the control device 10. The detection signal does not have to indicate the movement speed of the hammer 4 itself, and the movement speed may be calculated in the control device 10 as a detection signal in another mode. For example, a detection signal indicating that the hammer shank has passed may be output for two positions where the hammer shank passes while the hammer 4 is moving, or after passing through one position, the other position. A detection signal indicating the time until passing through may be output. As described above, the detection signal output from the hammer sensor 24 may be any signal as long as it allows the control device 10 to recognize the behavior of the hammer 4.

  The pedal sensor 23 is provided corresponding to each pedal 3, and outputs a detection signal corresponding to the behavior of the pedal 3 to the control device 10. In this example, the depression amount of the pedal 3 is detected, and a detection signal indicating the detection result is output to the control device 10. Note that the pedal sensor 23 may output a detection signal indicating that the pedal 3 has passed a specific depression position, instead of outputting a detection signal corresponding to the depression amount of the pedal 3. The specific depressing position is any position within the range from the pedal rest position to the end position, and is a depressing position where the damper 8 and the string 5 can be completely distinguished from the non-contact state. Desirably, it is more desirable to be able to detect the state of the half pedal by setting a plurality of positions as specific depression positions. As described above, the detection signal output from the pedal sensor 23 may be any signal as long as it allows the control device 10 to recognize the behavior of the pedal 3.

  It should be noted that, based on detection signals output from the key sensor 22, the pedal sensor 23, and the hammer sensor 24, the control device 10 causes the hammer 4 to strike the string 5 (key-on timing), the striking speed (velocity), and the string If the vibration suppression timing (key-off timing) of the damper 8 with respect to 5 can be specified corresponding to each key 2 (key number), the key sensor 22, the pedal sensor 23, and the hammer sensor 24 are The result of detecting the behavior of the key 2, the pedal 3, and the hammer 4 may be output as a detection signal in another mode.

The soundboard 7 is connected to the soundbar 75 and the piece 6, and transmits the vibration of the soundboard 7 to each string 5 through the piece 6, and transmits the vibration of each string 5 to the soundboard 7 through the piece 6. Is done.
In addition, a vibration unit 50 is connected to the soundboard 7. The vibration unit 50 includes a vibration unit 51 connected to the soundboard 7 and a yoke holding unit 52 (main body unit) supported by a support unit 55 connected to the straight support column 9. A drive signal is input from the control device 10 to the vibration unit 50. The vibration unit 51 vibrates according to the waveform indicated by the input drive signal, and vibrates the soundboard 7. Thereby, the piece 6 is also vibrated. In this example, the vibration unit 51 includes a voice coil 512 arranged so as to be positioned in a magnetic path formed by the yokes 521 and 523 of the yoke holding unit 52 and the magnet 522, and is input to the voice coil 512. Vibrates in response to the drive signal (see FIG. 5).

  FIG. 3 is a diagram illustrating the position of the vibration unit 50 in the embodiment of the present invention. In this example, two excitation units 50H and 50L are provided as the excitation unit 50. Hereinafter, when it is not necessary to distinguish the vibration units 50H and 50L from each other, they are simply referred to as the vibration unit 50.

The excitation unit 50 is connected between a plurality of sounding bars 75 in the sounding board 7. Moreover, the vibration part 50H is provided in the position corresponding to the piece 6H among the two pieces 6 (piece 6H (long piece), 6L (short piece)). On the other hand, the vibration unit 50L is provided at a position corresponding to the piece 6L. That is, the soundboard 7 is sandwiched between the vibration unit 50H and the piece 6H and is sandwiched between the vibration unit 50L and the piece 6L.
In addition, the number of the excitation parts 50 provided in the sound board 7 is not restricted to two, A larger number may be sufficient and only one may be provided. When the number of the vibration units 50 is one and the number of the pieces 6 is two, it is desirable that the vibration unit 50 is provided in the long piece 6H.

The piece 6H is a piece that supports the high-pitched string 5 and the piece 6L is a piece that supports the low-pitched string 5. Hereinafter, the pieces 6H and 6L are simply referred to as the pieces 6 when there is no need to distinguish them from each other. In addition, as described above, the vibration unit 50 is supported by the support unit 55 connected to the straight column 9.
Next, the configuration of the vibration unit 50 will be described.

[Configuration of Excitation Unit 50]
FIG. 4 is a diagram illustrating the appearance of the vibration unit 50 according to the embodiment of the present invention. In this figure, in order to make the main structure of the yoke holding portion 52 easier to see, the description of the housing 524 (see FIG. 5) of the yoke holding portion 52 is omitted, and the inside of the housing 524 is illustrated. The vibration part 51 includes a cylindrical connection member 511 and a voice coil 512 whose upper surface connected to the soundboard 7 is closed. The connecting member 511 is formed of a light material such as a resin such as polyimide or a metal such as an aluminum material, and a cap such as a resin is attached to the upper surface portion. The yoke holding part 52 includes a magnet 522 and yokes 521 and 523 that sandwich the magnet 522 therebetween. The yokes 521 and 523 are made of, for example, a soft magnetic material such as soft iron, and are extremely heavy compared to the connection member 511.
Further, the vibration part 51 and the yoke holding part 52 are separated by a space.

  FIG. 5 is a cross-sectional view of the vibration section 50 shown in FIG. 4 taken along a vertical plane passing through the center of the connection member 511 as seen from the horizontal direction. In FIG. 5, a housing 524 that is omitted in FIG. 4 is also illustrated. Further, in FIG. 5, the positions of the soundboard 7 and the piece 6 are indicated by broken lines in order to show the positional relationship between the vibration unit 50, the soundboard 7 and the piece 6. The vibration unit 51 includes a connection member 511 and a voice coil 512. The voice coil 512 is disposed so as to be positioned on a magnetic path that passes through a space formed between the yoke 521 and the yoke 523 among magnetic paths (broken arrows) formed by the yokes 521 and 523 and the magnet 522. ing. The drive signal input to the vibration unit 50 is input to the voice coil 512. In response to the magnetic force in the magnetic path formed as described above, the voice coil 512 generates a driving force so that the connection member 511 vibrates in the vertical direction in the figure according to the waveform indicated by the input driving signal. . At this time, since the yoke holding portion 52 is supported by the support portion 55 and its position is fixed, most of the driving force generated by the voice coil 512 is used as thrust for vibration of the connection member 511. It is done.

  The upper surface of the connection member 511 and the soundboard 7 are bonded by an adhesive, a double-sided tape (not shown), and the connection member 511 is fixed to the soundboard 7. The upper surface of the connection member 511 and the soundboard 7 are not limited to being connected to each other by bonding, but may be connected by screwing or the like. Thereby, the soundboard 7 is pushed upward when the connecting member 511 moves upward, and when the connecting member 511 moves downward, the connecting member 511 is not separated but is lowered by the connecting member 511. Will be pulled. In this way, the vibration in the connecting member 511 is applied to the piece 6 via the soundboard 7 and further transmitted to the string 5.

  The housing 524 houses the yokes 521 and 523 and the magnet 522. The housing 524 is supported by the support portion 55. At this time, the yoke holding portion 52 constituted by the yokes 521 and 523, the magnet 522, and the housing 524 is separated by the support portion 55 at a position separated from the vibration portion 51 by a space and not in contact with the soundboard 7. Supported. As shown in FIG. 5, in this example, the support portion 55 supports the yoke holding portion 52 from the lower surface side of the housing 524. Moreover, since the vibration part 51 (connection member 511) is separated from the yoke holding part 52 by the space, the vibration part 51 is connected to the sound board 7 and is supported by the sound board 7.

  Note that the vibration part 51 and the yoke holding part 52 are separated by a space means that they are not in contact with each other in the illustrated configuration. The configuration (for example, wiring to the voice coil 512) may be in contact with the yoke holding portion 52. At this time, it is desirable that a load of the yoke holding part 52 is not applied to the vibration part 51 by a part of the configuration.

  In this manner, the yoke holding part 52 of the vibration part 50 is supported by the support part 55 so that no load other than the vibration part 51 of the vibration part 50 is applied to the soundboard 7. Yes. The mode in which the support unit 55 supports the yoke holding unit 52 is any mode as long as no load other than the vibration unit 51 in the vibration unit 50 is applied to the soundboard 7. May be.

Here, the connection member 511 is made of a light material such as resin as compared with the members constituting the yoke holding portion 52. In addition, the vibration part 51 as a whole including the voice coil 512 is very light in comparison with the yoke holding part 52. Since the load of the yoke holding portion 52 is applied to the straight support 9 by the support portion 55, most of the load of the excitation portion 50 is not applied to the soundboard 7. Although the soundboard 7 is subjected to the load of the vibration portion 51, only a slight load is applied, so that the influence on the vibration characteristics of the soundboard 7 can be very reduced. The above is the description of the vibration unit 50.
Next, the configuration of the control device 10 will be described.

[Configuration of Control Device 10]
FIG. 6 is a block diagram illustrating a configuration of the control device 10 according to the embodiment of the present invention. The control device 10 includes a control unit 11, a storage unit 12, an operation panel 13, a communication unit 14, a signal output unit 15, and an interface 16. Each of these components is connected via a bus.
The control unit 11 includes a calculation device such as a CPU (Central Processing Unit), and a storage device such as a ROM (Read Only Memory) and a RAM (Random Access Memory). The control unit 11 controls each unit connected to each unit of the control device 10 and the interface 16 based on a control program stored in the recording device. In this example, the control unit 11 causes the control device 10 and a part of the configuration connected to the control device 10 to function as the keyboard instrument of the present invention by executing the control program.

  The storage unit 12 stores setting information indicating various setting contents used when executing the control program. The setting information is information for determining the content of the drive signal output from the signal output unit 15 based on detection signals output from the key sensor 22, the pedal sensor 23, and the hammer sensor 24, for example. The setting information also includes information indicating a sound generation mode, a performance mode, and the like set by the user.

  The operation panel 13 includes operation buttons that accept user operations. When a user's operation is accepted by this operation button, an operation signal corresponding to the operation is output to the control unit 11. The touch panel 60 connected to the interface 16 has a display screen such as a liquid crystal display, and a touch sensor that receives a user operation is provided on a surface portion of the display screen. This display screen includes a setting change screen for changing the content of the setting information stored in the storage unit 12 under control through the interface 16 of the control unit 11, a setting screen for setting various modes, a score, and the like. Various information is displayed. When a user operation is received by the touch sensor, an operation signal corresponding to the operation is output to the control unit 11 via the interface 16. An instruction from the user to the control device 10 is input by an operation accepted by the operation panel 13 and the touch panel 60.

  The communication unit 14 is an interface that communicates with other devices by wireless, wired, or the like. The interface may be connected to a disk drive that reads various data recorded on a recording medium such as a DVD (Digital Versatile Disk) or a CD (Compact Disk) and outputs the read data. Data input to the control device 10 via the communication unit 14 is, for example, music data used for automatic performance.

  The signal output unit 15 includes a sound source unit 151 that outputs an acoustic signal, an equalizer unit 152 that adjusts frequency characteristics of the acoustic signal, and an amplification unit 153 that amplifies the acoustic signal (see FIG. 7). The signal output unit 15 outputs an acoustic signal amplified by adjusting the frequency characteristics as a drive signal.

The interface 16 is an interface that connects the control device 10 and external components. In this example, the components connected to the interface 16 are a key sensor 22, a pedal sensor 23, a hammer sensor 24, a key drive unit 30, a stopper 40, a vibration unit 50, and a touch panel 60. The interface 16 outputs a detection signal output from the key sensor 22, the pedal sensor 23, the hammer sensor 24 and an operation signal output from the touch panel 60 to the control unit 11. The interface 16 outputs the control signal output from the control unit 11 to the key drive unit 30 and outputs the drive signal output from the signal output unit 15 to the vibration unit 50.
Next, a configuration that functions when the control unit 11 executes a control program will be described.

[Functional configuration of Grand Piano 1]
FIG. 7 is a block diagram showing a functional configuration of the grand piano 1 in the embodiment of the present invention. As shown in FIG. 7, when the key 2 is operated, the hammer 4 strikes the string 5 and the string 5 vibrates. This vibration is transmitted to the soundboard 7 through the piece 6. Further, the damper 8 is operated by the operation of the key 2 and the operation of the pedal 3. The vibration suppression state of the string 5 is changed by the operation of the damper 8.

  The setting unit 110 is realized by the touch panel 60 and the control unit 11 as a configuration having the following functions. First, the touch panel 60 receives a user operation for setting a sound generation mode. The control unit 11 changes the setting information according to the performance mode and the sound generation mode set by the user, and selects the selected sound generation mode for the performance information output unit 120 and the blocking control unit 130 according to these modes. The control signal shown is output.

  In addition, the touch panel 60 receives a user operation for setting various control parameters in the signal output unit 15. The various control parameters are parameters for determining the tone color of the musical tone indicated by the acoustic signal output from the sound source unit 151, the amplification factor in the amplification unit 153, and the like. Note that the frequency characteristic adjustment mode in the equalizer unit 152 is determined in advance. The frequency characteristic adjustment mode determined in advance will be described later.

  A configuration in which the user individually sets each control parameter may be employed, or the user selects one preset data from a plurality of preset data in which the values of the respective control parameters are stored in advance in the storage unit 12. Thus, a configuration for setting the control parameters may be employed. The control unit 11 changes the setting information according to various control parameters set by the user, and controls the drive signal output from the signal output unit 15 using these control parameters. Note that the amplification unit 153 may use a configuration in which only parameters set in advance are used and no parameter change is performed by the control unit 11.

  The performance information output unit 120 is realized by the control unit 11, the key sensor 22, the pedal sensor 23, and the hammer sensor 24 as a configuration having the following functions. The key sensor 22, the pedal sensor 23, and the hammer sensor 24 detect the behavior of the key 2, the pedal 3, and the hammer 4, respectively. Based on the detection signals that are output as a result, the control unit 11 detects the string 5 by the hammer 4. The sound source unit includes the hit timing (key-on timing), the key 2 number (key number) corresponding to the hit string 5, the hit speed (velocity), and the vibration suppression timing (key-off timing) of the damper 8 with respect to the string 5. It is specified as information (performance information) used in 151. In this example, the control unit 11 specifies the hit timing and the number of the key 2 from the behavior of the key 2, specifies the hitting speed from the behavior of the hammer 4, and sets the hitting speed and the key 3 to the vibration suppression timing. It is specified from the behavior. The hitting timing may be specified from the behavior of the hammer 4, and the hitting speed may be specified from the behavior of the key 2. The performance information may be indicated by, for example, control parameters in MIDI (Musical Instrument Digital Interface) format.

The control unit 11 outputs performance information indicating the key number, velocity, and key-on to the sound source unit 151 at the specified key-on timing. In addition, the control unit 11 outputs performance information indicating the key number and the key-off to the sound source unit 151 at the key-off timing. The control unit 11 realizes the above function when the sound generation mode set by the user is the weak sound mode or the strong sound mode. On the other hand, when the sound generation mode is the normal sound generation mode, in this example, the control unit 11 The output to the unit 151 is not performed. In the normal sound generation mode, it is only necessary to prevent the drive signal from being output from the signal output unit 15, so even if the performance information is output, the drive signal from the signal output unit 15 is not received. The control part 11 should just control so that it may not output.

  The blocking control unit 130 is realized by the control unit 11 as a configuration having the following functions. When the sound generation mode set by the user is the weak sound mode, the control unit 11 moves the stopper 40 to a position that prevents the hammer 4 from striking the string 5 while setting the normal sound generation mode or the strong sound mode. When being done, the stopper 40 is moved to a position that does not prevent the hammer 4 from striking the string 5.

The sound source unit 151 outputs an acoustic signal based on the performance information output from the performance information output unit 120 (control unit 11). For example, the sound source unit 151 outputs an acoustic signal so as to have a pitch corresponding to the key number and a volume corresponding to the velocity. In this example, the sound source unit 151 is input to an excitation signal (hereinafter referred to as acoustic signal H) used for a drive signal (hereinafter referred to as drive signal H) input to the excitation unit 50H and the excitation unit 50L. And a sound signal (hereinafter referred to as an acoustic signal L) used as a drive signal (hereinafter referred to as a drive signal L).
The acoustic signal H and the acoustic signal L may be the same signal or different signals. For example, the acoustic signal H and the acoustic signal L may have different frequency bands. For example, the acoustic signal H may have a higher frequency band than the acoustic signal L. Further, one channel among a plurality of channels such as Lch and Rch may be allocated.

  The equalizer unit 152 adjusts the frequency characteristic for each of the acoustic signal H and the acoustic signal L and outputs the adjusted acoustic signal. The frequency characteristic adjustment mode for the acoustic signal H is a frequency described later according to the vibration characteristic of the soundboard 7 at the connection position (hereinafter referred to as the connection position H) of the vibration part 51 of the vibration part 50H to the soundboard 7. This is specified by the characteristic specifying unit 155. The frequency characteristic adjustment mode for the acoustic signal L is the same depending on the vibration characteristic of the soundboard 7 at the connection position of the vibration part 51 of the vibration part 50L to the soundboard 7 (hereinafter referred to as the connection position L). This is specified by a frequency characteristic specifying unit 155 described later. Examples of these frequency characteristic adjustment modes will be described with reference to FIG.

  FIG. 8 is a diagram illustrating a frequency characteristic adjustment mode in the equalizer unit 152 according to the embodiment of the present invention. FIG. 8A shows an adjustment mode (hereinafter referred to as frequency characteristic H) of the frequency characteristic for the acoustic signal H in the equalizer unit 152, and FIG. 8B shows adjustment of the frequency characteristic for the acoustic signal L in the equalizer unit 152. A mode (hereinafter referred to as a frequency characteristic L) is shown.

The frequency characteristic H suppresses resonance in the vibration characteristic of the soundboard 7 at the connection position of the vibration part 51 of the vibration unit 50H to the soundboard 7 and suppresses the sound from being reduced at the dip frequency. It is decided to. In this example, the frequencies of the dips D1 and D2 in the frequency characteristic H correspond to the resonance peak frequency. The frequency of peak P1 corresponds to the frequency of dip. Note that either such dip or peak may not be present in the frequency characteristic H.
Further, in the frequency characteristic H in this example, the high frequency gain of the frequency characteristic H is increased in response to the fact that the high frequency characteristic of the excitation in the vibration unit 50 falls due to the influence of the inductance of the voice coil 512. An increased increase area S1 is set. Note that the increased area S1 may not exist.
The acoustic signal H is in a state where the output level at the resonance peak frequency is suppressed due to the presence of the dips D1 and D2, and the state where the output level is suppressed from decreasing at the dip frequency due to the presence of the peak P1, Due to the presence of the amplification region S1, the amplification unit 153 amplifies the influence of the inductance of the voice coil 512 and inputs the drive signal H to the vibration unit 50H. Thus, the drive signal H is a signal having a frequency characteristic set so as to suppress the influence of the resonance peak and dip of the soundboard 7 at the connection position H. Further, even when the high-frequency output decreases due to the influence of the inductance of the voice coil 512, the decrease can be corrected.

On the other hand, the frequency characteristic L suppresses the resonance in the vibration characteristic of the soundboard 7 at the connection position of the vibration part 51 of the vibration part 50L to the soundboard 7, and suppresses the sound from being reduced at the dip frequency. It is decided to do. In this example, the frequency of the dip D3 in the frequency characteristic L corresponds to the frequency of the resonance peak. The frequencies of the peaks P2 and P3 correspond to the dip frequency. Note that either such dip or peak may not exist in the frequency characteristic L.
Further, in the frequency characteristic L in this example, as with the frequency characteristic H, the frequency characteristic corresponds to the fact that the high frequency characteristic of excitation in the excitation unit 50 is reduced due to the influence of the inductance of the voice coil 512. An increase region S2 in which the gain of the high region of L is increased is set. This increase area S2 may not exist.
The acoustic signal L is in a state where the output level at the resonance peak frequency is suppressed due to the presence of the dip D3, and in which the output level is suppressed from decreasing at the dip frequency due to the presence of the peaks P2 and P3. Further, due to the presence of the amplification region S2, it is amplified by the amplification unit 153 while suppressing the influence of the inductance of the voice coil 512, and is input to the vibration unit 50L as the drive signal L. Thus, the drive signal L is a signal having a frequency characteristic set so as to suppress the influence of the resonance peak and dip of the soundboard 7 at the connection position L. Further, even when the high-frequency output decreases due to the influence of the inductance of the voice coil 512, the decrease can be corrected.
Note that the amplifying unit 153 may amplify the acoustic signals H and L with the same amplification factor or different amplification factors.

  As described above, the vibration units 50 </ b> H and 50 </ b> L vibrate according to the input drive signals H and L and vibrate the piece 6 through the soundboard 7. Thereby, the vibration applied to the piece 6 is also transmitted to the string 5.

  The frequency characteristic specifying unit 155 specifies the frequency characteristic H and the frequency characteristic L that indicate how the frequency characteristic is adjusted with respect to the drive signal H and the drive signal L performed by the equalizer unit 152. FIG. 9 is a diagram for explaining a mechanism in which the frequency characteristic specifying unit 155 specifies the frequency characteristic H and the frequency characteristic L.

  For example, when the adjustment worker performs a predetermined operation for supporting the frequency characteristic specifying process on the touch panel 60 before the grand piano 1 is shipped, the signal output unit 15 outputs an impulse signal as a drive signal to the vibration unit 50H. . The voice coil 512 of the vibration unit 50 </ b> H is strongly driven by the drive signal input from the signal output unit 15 for a very short time, and vibrates the soundboard 7 via the connection member 511. After receiving this vibration, the soundboard 7 vibrates in the same manner as when it is struck once with a hard object at the position where the vibration part 50H is disposed.

  When the soundboard 7 vibrates, the voice coil 512 also vibrates according to the vibration. When the voice coil 512 arranged on the magnetic path formed by the yoke holding part 52 vibrates, an electromotive force is generated between both ends of the voice coil 512. In order to measure a voltage value generated by the electromotive force, a voltmeter 160 is connected between both ends of the voice coil 512. The voltmeter 160 outputs a voltage value between both ends of the boil coil 512 generated by the vibration of the soundboard 7 to the frequency characteristic specifying unit 155.

  The frequency characteristic specifying unit 155 records the voltage value sequentially input from the voltmeter 160, and converts the frequency characteristic of the waveform (the waveform corresponding to the vibration of the soundboard 7) indicated by the time series change of the recorded voltage value, such as Fourier transform. It is specified by a known method. The frequency characteristics specified in this way indicate the vibration characteristics at the position (connection position H) where the excitation unit 50H of the soundboard 7 is connected. In accordance with the frequency characteristic at the connection position H of the soundboard 7 thus specified, the frequency characteristic specifying unit 155, for example, increases the frequency band component indicating the dip and suppresses the frequency band component indicating the peak. The frequency characteristic H for adjusting the drive signal which the part 152 outputs to the vibration part 50H is specified.

Subsequently, the signal output unit 15 outputs an impulse signal as a drive signal to the vibration unit 50L. Thereafter, processing similar to that described above with respect to the vibration unit 50H is performed on the vibration unit 50L. As a result, the frequency characteristic specifying unit 155 specifies the frequency characteristic L for adjusting the drive signal output from the equalizer unit 152 to the excitation unit 50L.
The above is the description of the functional configuration of the grand piano 1.

[Operation example]
Then, the operation example of the grand piano 1 in embodiment of this invention is demonstrated. First, the user operates the touch panel 60 to set the performance mode to the normal performance mode and the sound generation mode to the weak sound mode. In this state, when the user performs a performance by operating the key 2, the hammer 4 is prevented from hitting the string 5 by the stopper 40, while the sound board 7 is vibrated by the vibration unit 50, and sound is emitted from the sound board 7. Is done. In addition, when the piece 6 is vibrated through the soundboard 7, the string 5 whose vibration is not suppressed by the damper 8 also vibrates, and a sound similar to an acoustic piano is produced. At this time, the striking of the string 5 by the hammer 4 is blocked by the stopper 40, so there is no sound produced by the striking. Therefore, by adjusting the amplitude of vibration of the excitation unit 50, the sound effect due to the vibration of the soundboard 7 and the resonance of the string can be reduced in volume (or higher volume) than the sound produced by striking the string and in the same manner as the acoustic piano. The pronunciation can be used.

  At this time, the vibration unit 50H vibrates the soundboard 7 using the drive signal H having a frequency characteristic set so as to suppress the influence of the resonance peak and dip of the soundboard 7 at the connection position H. The vibration unit 50L vibrates the soundboard 7 using the drive signal L having frequency characteristics set so as to suppress the influence of the resonance peak and dip of the soundboard 7 at the connection position L. Therefore, when the excitation unit 50 is attached to the soundboard, the influence of the resonance of the soundboard 7 on the sound quality can be controlled so that the sound is not produced with unintended sound quality. Further, since the sound can be generated with a relatively flat frequency characteristic over the entire audible band, it is not necessary to use a normal speaker that generates sound by driving cone paper. As a result, it is possible to produce sound only by vibrating the soundboard 7, so that a natural acoustic effect utilizing the acoustic piano's sound generation mechanism can be obtained.

  When the user operates the touch panel 60 and sets the sound generation mode as the normal sound generation mode, the vibration by the vibration unit 50 is not performed, and the string 5 is not prevented from being hit by the hammer 4. Therefore, sound generation is performed by string striking, and vibration of the string 5 is transmitted to the soundboard 7 via the piece 6. The soundboard 7 emits a sound corresponding to the vibration transmitted from the string 5. At this time, since the sound board 7 is only subjected to the load of the vibration part 51 of the very light part of the vibration part 50, the vibration part 50 almost affects the vibration characteristics of the sound board 7 itself. No, the performer can perform without impairing the acoustic performance of the original acoustic piano.

  When the user operates the touch panel 60 to set the sound generation mode as the strong sound mode, the vibration unit 50 vibrates the soundboard 7 and the hammer 4 strikes the string 5 at the same time. Is called. Therefore, the soundboard 7 radiates sound by the vibration obtained by adding the vibration of the string 5 transmitted by the string 6 and the vibration generated by the vibration from the vibration unit 50. In addition, the string 5 struck by the hammer 4 emits sound by vibration, and the string 5 whose vibration is not suppressed by the damper 8 vibrates through the piece 6 according to the vibration of the soundboard 7 and generates resonance sound. To emit. Therefore, the performer can perform with a sound in which the sound of the original acoustic piano and the sound indicated by the acoustic signal output from the sound source unit 151 are naturally mixed.

<Modification>
As mentioned above, although embodiment of this invention was described, this invention can be implemented in various aspects as follows.
[Modification 1]
In the above-described embodiment, the vibration part 51 (connection member 511) is separated from the yoke holding part 52 by a space, but may be indirectly connected to the yoke holding part 52 (housing 524).

FIG. 10 is a cross-sectional view of the excitation unit 50A in Modification 1 of the present invention. The vibration unit 50 </ b> B in this example includes a damper unit 53 that connects the connection member 511 and the housing 524. The damper portion 53 expands and contracts following the vertical vibration of the connection member 511 from the standard position where the voice coil 512 is not driven by the drive signal and no force is applied to the soundboard 7 by the connection member 511. In this example, the connection member 511 is not yet connected to the soundboard 7 and is supported only by the damper portion 53, and the upper surface of the connection member 511 at the standard position is just in contact with the lower surface of the soundboard 7. Thus, the height of attachment of the vibration unit 50 to the support unit 55 is adjusted. In this state, the upper surface of the connection member 511 and the lower surface of the soundboard 7 are connected.
For this reason, the weight of the vibrating portion 50 is not applied to the soundboard 7 at the standard position. Further, although the damper portion 53 can support the light vibration portion 51, the damper portion 53 has high stretchability, and therefore the weight of the yoke holding portion 52 is transferred to the vibration portion 51 via the damper portion 53 when the soundboard 7 vibrates. There is almost no transmission, and there is almost no influence on the vibration characteristics of the soundboard 7. Further, since the positional relationship between the vibration part 51 and the yoke holding part 52 is maintained by the presence of the damper part 53, the work when connecting the vibration part 50A to the soundboard 7 becomes easy.

[Modification 2]
In the above-described embodiment, the example in which the grand piano 1 is used as the keyboard instrument has been described, but an upright piano may be used.

  FIG. 11 is a diagram showing an internal structure of the upright piano 1B according to the second modification of the present invention. In FIG. 11, each component of the upright piano 1 </ b> B is denoted by a symbol obtained by adding “B” to a symbol corresponding to each component of the grand piano 1 in the embodiment. Also in the case of the upright piano 1B, the vibration part 51B in the vibration part 50B is connected to the soundboard 7B, and the yoke holding part 52 is supported by the support part 55B connected to the straight column 9B.

  FIG. 12 is a diagram illustrating the position of the excitation unit 50B in Modification 2 of the present invention. Also in this example, as in the embodiment, the vibration unit 50B (50B1, 50B2) is connected between the sounding bars 75B in the sounding board 7B. Moreover, the vibration part 50B is provided in the position corresponding to the piece 6B (in other words, the back surface of the position where the piece 6B of the soundboard 7B is attached). In the example shown in FIG. 12, the support portion 55B is connected to the plurality of straight columns 9B, but may be connected to one straight column 9B. In addition, although the position which provides the vibration part 50B was made into the position corresponding to a long piece among pieces 6B, it is good also as a position corresponding to a short piece (illustration omitted). Moreover, you may provide in the position corresponding to each of a long piece and a short piece. With this configuration, both pieces can be efficiently and accurately driven with desired vibration. Furthermore, it is good also as a structure which installs the vibration part 50B in one or more places in each of a long piece and a short piece, and applies a vibration to both pieces.

[Modification 3]
In the above-described embodiment, the vibration unit 50 is supported by the support unit 55 so that no load other than the vibration unit 51 is applied to the soundboard 7. It may take. For example, the excitation unit 50 may be supported in a state where the support unit 55 is connected to the soundboard 7.
Moreover, the support part 55 does not exist and the vibration part may be directly attached to the soundboard 7. An example in the case where the support portion 55 does not exist will be described with reference to FIG.

  FIG. 13 is a diagram illustrating a state in which the vibration unit 50C according to the third modification of the present invention is attached to the soundboard 7. The vibration part 50C has a vibration part 51C and a connection part 54C. The vibrating part 51C is connected to the soundboard 7 by a connecting part 54C such as a screw. The vibration part 51C has a weight inside, vibrates the weight in accordance with an input drive signal, and vibrates the soundboard 7 by its reaction.

  At this time, since the load of the entire vibration unit 50C is applied to the soundboard 7, the vibration characteristic of the soundboard 7 may change as it is, but according to the present invention, the frequency characteristic of the drive signal is changed. The inconvenience is reduced by setting the frequency characteristics according to the changed vibration characteristics. Even when the sound generation mode is the normal sound generation mode, if the sound quality changes due to the change in vibration characteristics compared to the case where the excitation unit 50C is not attached, the change in the vibration characteristics is used as the drive signal. It may be corrected by the vibration of the vibration unit 50C according to the above. A configuration without the normal sound generation mode may be used.

[Modification 4]
In the embodiment described above, the drive signal is a signal in which the frequency characteristic of the acoustic signal is adjusted by the equalizer unit 152, but the drive signal may not be a signal adjusted using the equalizer unit 152. In this case, the sound source unit 151 may output an acoustic signal H (acoustic signal L) having a frequency characteristic corresponding to the driving signal H (driving signal L). The acoustic signal H (acoustic signal L) may be amplified by the amplifying unit 153 and output as the driving signal H (driving signal L).

[Modification 5]
In the above-described embodiment, the drive signal H (drive signal L) is a frequency set so that a dip and a peak exist at the resonance peak and dip frequencies of the soundboard 7 at the connection position H (connection position L). Although the signal has a characteristic, it may be a signal having a frequency characteristic set so that there is a dip and a peak at another frequency. Due to the presence of dips and peaks at frequencies other than the resonance peak frequency, it is possible to produce sound with various timbres.
For the frequency characteristics combining such dips and peaks, data indicating the pattern of these combinations is stored in the storage unit 12 in advance, and the user operates the touch panel 60 or the like to set it as the frequency characteristics of the drive signal. You may comprise so that the pattern to perform can be selected. Alternatively, the combination pattern of dip and peak may be determined by the user and stored in the storage unit 12 as a new template.
Note that the frequency characteristics of the drive signal H and the frequency characteristics of the drive signal L may have different dip and peak combination patterns.

Further, the drive signal is not limited to the case where the resonance of the soundboard 7 is set to be suppressed, and may be a signal having a frequency characteristic set so as to strongly generate the resonance. In this case,
The drive signal may be a signal having a frequency characteristic set so that a peak exists instead of having a dip at the resonance peak frequency of the soundboard 7. Further, the drive signal may be a signal having a frequency characteristic set so that a dip exists instead of a peak at the dip frequency in the soundboard 7.
The frequency characteristic of the drive signal H is set so that there is a dip at the resonance peak frequency as in the embodiment, and the frequency characteristic of the drive signal L is set so that a peak exists at the resonance peak frequency. It may be.

  Thus, the drive signal input to each of the plurality of vibration units 50 depends on the vibration characteristics of the soundboard 7 at the position where the vibration unit 51 of the vibration unit 50 to which the drive signal is input is connected. Any signal may be used as long as it has a frequency characteristic.

[Modification 6]
In the embodiment described above, the frequency characteristics of the drive signal H (drive signal L) are preliminarily set so that there are dip and peak at the resonance peak and dip frequency of the soundboard 7 at the connection position H (connection position L). Although set, the dip, peak frequency and size (hereinafter referred to as setting parameters) may be changed when the mounting position of the vibration unit 50H (vibration unit 50L) is changed. The setting parameter may be set by the user operating the touch panel 60 or the like and specifying it. In addition, when the user operates the touch panel 60 or the like and designates the attachment position (coordinates or the like on the soundboard 7) of the vibration unit 50, the control unit 11 represents the vibration characteristics of the soundboard 7 set in advance. A setting parameter to be set may be calculated based on information (for example, an arithmetic expression indicating the relationship between coordinates and vibration characteristics in the soundboard 7).

[Modification 7]
In the above-described embodiment and its modification, the excitation unit is provided at a position corresponding to the piece of the soundboard, but may be located away from the piece.

  FIG. 14 is a diagram illustrating an example in which the upright piano 1B according to the second modification illustrated in FIG. 11 is modified and the excitation unit 50B is disposed at a position away from the piece 6B of the soundboard 7B. In the example shown in FIG. 14, the two excitation parts 50B are respectively arranged at positions (the back surface of the soundboard 7B in FIG. 14) facing the soundbar 75B across the soundboard 7B.

  FIG. 15 is a diagram illustrating a state in which the vibration unit 50B illustrated in FIG. 14 is supported by the support unit 55B. As shown in FIG. 15, the support portion 55 </ b> B of this modification is formed by bending a plate made of stainless steel or the like by 90 degrees in opposite directions along a line perpendicular to the longitudinal direction at two different locations in the longitudinal direction. It has a shape. A plane portion constituting one end of the support portion 55B is attached to the back surface of the shelf board 90 of the upright piano 1B by screws or the like. A yoke holding portion 52B of the vibration exciting portion 50B is attached to a plane portion constituting one end portion of the support portion 55B. The yoke holding part 52B is arranged at a position facing the sounding bar 75B with the sounding board 7B interposed therebetween, and accommodates the vibration part 51B connected to the sounding board 7B at that position.

  As in the above example, even in the configuration in which the excitation unit is connected to the soundboard at a position corresponding to the sounding board instead of the piece, the vibration by the vibrationing part is efficiently transmitted to the entire sounding board by the sounding bar. Desired sound emission by the soundboard can be performed.

  In addition, a vibration bar, which is a bar-like member different from the sounding bar, is mounted on the surface of the sounding board, for example, on the opposite side of the sounding bar, and the vibration unit is placed at a position facing the vibrationing bar with the sounding board in between. The arrangement may be adopted. In this case, since the vibration bar can be designed separately from the existing piece or the sounding bar, the vibration bar is arranged so that the sound of the desired acoustic characteristics is radiated from the sounding board according to the vibration of the vibration unit. It is desirable to adjust the shape, size, arrangement position, and the like.

  Furthermore, as long as a desired sound is emitted, a configuration in which the excitation unit is arranged at a position on the soundboard that does not correspond to any of the piece, the soundbar, and the vibration bar may be employed.

[Modification 8]
In the embodiment described above, the yoke holding unit 52 generates a magnetic force using the magnet 522. However, when the vibration unit 51 is not vibrated using a configuration such as an electromagnet that can control the presence or absence of the magnetic force (for example, sound generation) When the mode is the normal sound generation mode), the generation of magnetic force may be stopped.

[Modification 9]
In the above-described embodiment, the vibration unit 50 includes the vibration unit 51 and the yoke holding unit 52 and is realized by a configuration close to a dynamic speaker using a voice coil, but is realized by another configuration. May be.
For example, the vibration part 51 is formed of a sheet-like magnetic material and is attached to the soundboard 7. On the other hand, the configuration corresponding to the yoke holding portion 52 supported by the support portion 55 may be a configuration having an electromagnet that controls the strength and polarity of the magnetic force based on the drive signal. The vibration part 51 should just vibrate the soundboard 7 with the attractive force and repulsive force which arise by the change of this magnetic force.

[Modification 10]
In the embodiment described above, the support portion 55 supports the vibration unit 50 in a state where it is connected to the straight column 9, but may be in a state where it is connected to a place other than the straight column 9. For example, the support unit 55 may support the vibration unit 50 in a state where the support unit 55 is connected to a side plate or a leg of the grand piano 1. Further, the support unit 55 may support the excitation unit 50 in a state in which the support unit 55 is connected to a portion different from the grand piano 1, for example, a room structure (floor, wall, etc.) where the grand piano 1 is installed. Good.

[Modification 11]
The control program in the above-described embodiment is provided in a state stored in a computer-readable recording medium such as a magnetic recording medium (magnetic tape, magnetic disk, etc.), an optical recording medium (optical disk, etc.), a magneto-optical recording medium, or a semiconductor memory. Can do. The grand piano 1 may download the control program via a network.

[Modification 12]
In the embodiment described above, the connecting member 511 has a cylindrical shape having a diameter substantially the same as the diameter of the voice coil 512, but the shape of the connecting member 511 is not limited to this. FIG. 16 is a diagram showing an example of a vibration unit according to the present invention having a connection member 511 having a non-cylindrical shape. The connection member 511 of the vibration portion 50 shown in FIG. 16 has a hollow cylindrical main body portion 5111 with the upper surface closed and the lower surface opened, and the lower surface of the main body portion 5111 extending from the center of the upper surface upward. A columnar support bar 5112 attached to the upper surface of the portion 5111 is provided. The upper surface of the support bar 5112 is connected to the lower surface of the soundboard 7, and the soundboard 7 is vibrated by the upper surface of the support bar 5112.

  According to the vibration unit 50 having the connection member 511 having the shape shown in FIG. 16, for example, a sounding rod 75 near a desired position (for example, a position corresponding to the piece 6) on the sounding board 7 where the vibration unit 50 is to be disposed. Even if the connection member 511 according to the above-described embodiment interferes with the sounding rod 75, the connection to the sounding plate 7 is not required as long as the support bar 5112 does not interfere with the sounding rod 75. The member 511 can be connected.

[Modification 13]
In the above-described embodiment, in order to specify the frequency characteristic H and the frequency characteristic L indicating the adjustment mode of the drive signal performed by the equalizer unit 152, the signal output unit 15 provides an impulse to the excitation unit 50H and the excitation unit 50L. A configuration is adopted in which a signal is output as a drive signal, and the vibration unit 50H and the vibration unit 50L perform vibration according to the impulse signal to the soundboard 7. The drive signal output from the signal output unit 15 to the excitation unit 50H and the excitation unit 50L is not limited to an impulse signal, and outputs other waveform signals such as a TSP (Time Streched Pulse, Swept Sine) signal as a drive signal. A configuration may be employed.

  However, when a signal over a long period of time as compared with an impulse signal, such as a TSP signal, is output to the vibration unit 50H and the vibration unit 50L, the soundboard 7 that vibrates due to vibration according to the preceding portion of the signal. In contrast, excitation is performed by the subsequent portion of the signal. In that case, the influence component by the excitation to the waveform corresponding to the vibration of the soundboard 7 may be removed by a process such as subtracting the waveform indicated by the drive signal from the waveform indicated by the voltage value.

  In addition, in order to specify the frequency characteristic H and the frequency characteristic L indicating the adjustment mode of the drive signal performed by the equalizer unit 152, the vibration to the soundboard 7 according to the impulse signal and the like by the vibration unit 50H and the vibration unit 50L Instead, for example, an adjustment worker or the like strikes the soundboard 7 at the connection position H and the connection position L using a hammer or the like (an instrument that does not damage the soundboard 7 by the impact), and the resulting vibration of the soundboard 7 is affected. A configuration in which the frequency characteristic specifying unit 155 processes the corresponding voltage value may be employed.

[Modification 14]
In the above-described embodiments and modifications, a piano is employed as an example of a keyboard percussion instrument. The present invention can also be applied to a keyboard percussion instrument other than a piano such as a Celesta having a metal sound board as a sounding body instead of a string.

DESCRIPTION OF SYMBOLS 1 ... Grand piano, 1B ... Upright piano, 2, 2B ... Key, 3, 3B ... Pedal, 4, 4B ... Hammer, 5, 5B ... String, 6, 6B, 6H, 6L ... Piece, 7, 7B ... Sound Plate, 8, 8B ... Damper, 9 ... Straight column, 9B ... Straight column, 10 ... Control device, 11 ... Control unit, 12 ... Storage unit, 13 ... Operation panel, 14 ... Communication unit, 15 ... Signal output unit, 16 ... interface, 22, 22B ... key sensor, 23, 23B ... pedal sensor, 24, 24B ... hammer sensor, 30, 30B ... key drive, 40, 40B ... stopper, 50, 50A, 50B, 50C, 50H, 50L ... Vibrating part, 51, 51B, 51C ... vibrating part, 511 ... connecting member, 512 ... voice coil, 52, 52B ... yoke holding part, 521, 523 ... yoke, 522 ... magnet, 524 ... casing, 53 ... damper part , 54 ... Connection part, 55, 55B ... Supporting part, 60 ... Touch panel, 75, 75B ... Sound stick, 110 ... Setting part, 120 ... Performance information output part, 130 ... Blocking control part, 151 ... Sound source part, 152 ... Equalizer part, 153 ... Amplifying unit, 155 ... Frequency characteristic specifying unit, 160 ... Voltmeter

Claims (5)

Key and
A sounding body provided corresponding to the key;
A hammer that strikes the sounding body in response to an operation of the key;
A soundboard that vibrates with the vibration of the sounding body;
A vibration unit that vibrates according to an input drive signal, connected to the soundboard, and a vibration unit that vibrates the soundboard by vibration of the vibration unit;
A performance information output unit for outputting performance information corresponding to the operation of the key;
A signal output unit that outputs the drive signal indicating the sound based on the performance information to the excitation unit;
The vibration unit has the voice coil arranged on the magnetic path to which the drive signal is input,
The keyboard instrument according to claim 1, wherein the drive signal is a signal having a frequency characteristic corresponding to a vibration characteristic of the sound board specified based on an electromotive force generated at both ends of the voice coil due to the vibration of the sound board. A voltmeter for measuring a voltage generated at both ends of the voice coil with vibration of the soundboard;
A frequency characteristic specifying unit for specifying a frequency characteristic of the drive signal based on a voltage value output from the voltmeter;
The keyboard instrument according to claim 1, further comprising: A plurality of the vibrators respectively connected to the soundboard at different positions of the soundboard;
For each of the plurality of vibration units, the drive signal input to the vibration unit is a vibration of the soundboard specified based on electromotive forces generated at both ends of the voice coil of the vibration unit corresponding to the vibration unit. The keyboard instrument according to claim 1 , wherein the keyboard instrument has a frequency characteristic corresponding to the characteristic. The drive signal is any one of claims 1 to 3, wherein the vibration unit is a signal having a frequency characteristic to suppress the resonance of the soundboard at the position connected to the soundboard Keyboard instrument as described in the section . The soundboard is provided with a first piece and a second piece,
The first excitation unit connected to a position corresponding to the first piece in the sound board, and a second connected to a position corresponding to the second piece in the sound board. The keyboard instrument according to any one of claims 1 to 4 , further comprising the excitation unit.

Images