JP5228218B2 - Keyboard instrument - Google Patents

Description

  The present invention relates to a keyboard instrument, and more particularly, to a keyboard instrument that can be reduced in weight and size by replacing only a resonance mechanism portion composed of strings and a frame of an acoustic piano with electronic technology.

  In the past, attempts to introduce electronic technology to acoustic pianos have been made with automatic performance pianos and mute pianos. These keyboard instruments are mechanically generating musical sounds such as a keying mechanism by electrically controlling only the keying time and keying strength with respect to the mechanically generating means such as a stringing mechanism. And means for electrically generating musical sounds.

  There are keyboard instruments called electric pianos and electronic pianos. Electric pianos pick up vibrations when strings and rods are struck, and process the picked-up electrical signals with electronic circuits such as filters. Then, the sound is emitted from the speaker as a musical sound. Electronic pianos are mainly used for sampling acoustic piano sounds and recording them in PCM, and then playing back the piano waveform corresponding to the key operation based on the PCM recorded data.

  Patent Document 1 describes that in a keyboard instrument having no strings, the hit portion has a multilayer structure of a cushioning material and an elastic member in order to sufficiently reproduce the key touch feeling.

Japanese Patent Application Laid-Open No. H10-260260 describes that the hitting portion has a multilayer structure of a cushioning material and an elastic member in order to realistically reproduce the key touch feeling at the time of hitting the string.
JP 2003-208178 A JP-A-5-80763

  With an acoustic piano completed using mechanical mechanism technology, the tone can be changed by subtle differences in performance, and the piano player listens to the piano sound emitted by the performance and makes it as desired. You can play while modifying the tone.

  The history of the acoustic piano can be said to be the history of improvement to increase the volume, and the history of the development of the piano wire that can withstand high tension and the development of the frame structure that supports the high tension. For this reason, the weight of the piano is increased and the length of the piano wire (string length) is lengthened, but there is a limit to such a mechanical structure.

  On the other hand, in an electronic piano that generates a musical tone by PCM recording the sound of an acoustic piano and then playing the piano waveform, it is difficult to enable subtle timbre control due to differences in performance. This is because an enormous number of timbre patterns are required to express subtle differences in performance, but there is a limit to the data recorded by PCM through sampling, and it is difficult to meet such requirements. .

  Patent Documents 1 and 2 solve the problem of the reproduction of the key touch feeling at the time of stringing, and in this case, timbre control that can simulate the acoustic output of an acoustic piano is not a problem.

  An object of the present invention is to provide a keyboard instrument that can be reduced in weight and size that exceeds the mechanical limit of an acoustic piano and that can be controlled delicately like an acoustic piano.

In order to achieve the above object, the present invention provides a striking mechanism comprising a plurality of keys, a damper pedal, a soundboard, an action hammer and a pseudo string provided for each key, and the pseudo string of the action hammer. A striking signal extracting means for extracting a striking state of the striking as a striking signal including a striking strength and each frequency component, a damper signal generating means for generating a damper signal in response to an operation of the key or the damper pedal, and the striking A soundboard drive signal generating means for receiving a signal and the damper signal and generating a soundboard drive signal having a pitch according to the operated key; and a soundboard drive means for driving the soundboard according to the soundboard drive signal wherein the sound board drive signal generating means includes an adder which said striking signal is input, delay means for delaying the output of said adder, the phase characteristics and vibration to the output of said delay means Filter means for giving a characteristic to the adder, controlling the filter means by the damper signal, giving a frequency shift of a harmonic overtone with respect to a fundamental tone in an acoustic piano by the phase characteristic, and for each overtone by the amplitude characteristic The first feature is that different attenuation characteristics are given to the.

Further, the present invention, the filter means, second in that it has a multiplier for outputting the multiplied by a damper signal to the output of the FIR filter and said FIR filter the output of said delay means is input to said adder There are features.

In the present invention, the filter unit includes an FIR filter to which an output of the delay unit is input and an IIR low-pass filter that filters the output of the FIR filter and outputs the filtered output to the adder. A third feature is that the cutoff frequency is controlled by the damper signal.

In addition, the present invention has a fourth feature in that the FIR filter convolves the output of the delay means using impulse response waveform data registered in advance in a table.

Further, the present invention has a fifth feature in that the FIR filter performs convolution processing on the output of the delay means using impulse response waveform data registered in a table in advance and its interpolation data.

In addition, the present invention has a sixth feature in that the pseudo string differs in stiffness or natural frequency depending on the key.

In addition, the present invention has a seventh feature in that the damper signal generating means includes damper position detecting means for detecting a position of a damper that operates according to an operation of the key and the damper pedal.

In the present invention, the damper signal generating means includes key depression detecting means for detecting the key depression depth of the key and damper pedal detection means for detecting the operation depth of the damper pedal, An eighth feature is that a damper signal is generated from the operation depth of the damper pedal.

Further, the present invention further includes a sostenuto pedal, the damper signal generating means, there is a ninth aspect of the point to generate a damper signal in response to the operation of the key or the damper pedal or the sostenuto pedal.

In addition, the present invention includes a plurality of soundboard drive signal generating means for each key, and the plurality of soundboard drive signal generating means has a tenth difference in that the frequency characteristics of overtones and the attenuation characteristics are different for each overtone. There are features.

The eleventh aspect of the present invention is that a soundboard drive signal allocating means for weighting and adding the soundboard drive signals generated by the soundboard drive signal generating means for each key to the soundboard drive means is provided. There are features.

In addition, the present invention has a twelfth feature in that the hardness of the action hammer is adjusted by needle stick.

  In the present invention, since only the resonance mechanism portion constituted by the strings and the frame of the acoustic piano is replaced by electronic technology, it is possible to reduce the weight and size beyond the mechanical limit of the acoustic piano.

  In addition, the soundboard drive signal generation means generates a soundboard drive signal that simulates the frequency shift of the overtone with respect to the fundamental wave of an acoustic piano and a different attenuation characteristic for each overtone. Performance expression is possible.

  In addition, the amount of data to be registered in the table can be reduced by calculating and calculating the interpolation data from the impulse response waveform data registered in the table in advance. Can be generated with high precision.

  Also, by varying the stiffness or natural frequency of the pseudo string according to the key, it is possible to bring the key touch feeling together with the timbre closer to the acoustic piano.

  Furthermore, by adjusting the hardness of the action hammer with a needle stick, the tone and volume can be finely adjusted.

  The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an embodiment of a keyboard instrument according to the present invention. This keyboard instrument includes a batting signal extraction means 11, a damper signal generation means 12, a soundboard drive signal generation means 13 and a soundboard drive means 14. The striking signal extraction means 11 and the soundboard drive signal generation means 13 are provided for each key, and the damper signal generation means 12 is provided for each key or damper pedal.

  This keyboard instrument also includes a striking mechanism comprising a plurality of keys, a damper pedal, a sound board, an action hammer provided for each key, and a pseudo string, which are not shown. The pseudo string may be a cantilever-like or doubly-supported bar-like or plate-like elastic body having the same stiffness and natural frequency as a piano string.

  When the hammer action of the desired energy is triggered according to the player's key pressing operation, the pseudo string is struck with this energy. The striking signal extraction means 11 extracts the striking signal SW of the pseudo string struck by the hammer. The hit signal SW includes not only the strength of the hit but also each frequency component (spectrum). The extraction of the hit signal SW can be performed, for example, by arranging a pressure sensor or a strain sensor on the pseudo string.

  FIG. 2 shows a specific example of the striking signal SW at the time of heavy hitting. FIG. 2 (a) shows the waveform of the striking signal SW, and FIG. 2 (b) shows the spectrum of the striking signal SW. 3 shows a specific example of the hit signal SW at the time of weak hit, FIG. 3A shows the waveform of the hit signal SW, and FIG. 3B shows the spectrum of the hit signal SW. Comparing hard hitting with weak hitting, the power is higher and the spectrum band is wider when hitting hard. The spectrum is discrete. Further, a noise component is also present when the pseudo string is not hit.

  The damper signal generation means 12 detects the position of the damper that moves according to the operation of the key and the damper pedal, and generates a damper signal (sound control signal) DP. A damper signal DP is generated for the sound output for the key when the key is operated, and for the sound output for all keys when the damper pedal or the sostenuto pedal is operated.

  The damper signal generation means 12 may detect a key pressing depth or a damper pedal operation depth. When a sostenuto pedal is provided, a damper signal is further generated in response to the operation of the sostenuto pedal.

  The soundboard drive signal generation means 13 receives the impact signal SW extracted by the impact signal extraction means 11 and the damper signal DP generated by the damper signal generation means 12, and generates the soundboard drive signal KDS. Details of the soundboard drive signal generation means 13 will be described later.

  The soundboard drive means 14 drives the soundboard with the soundboard drive signal KDS generated by the soundboard drive signal generation means 13. The soundboard may be the same as that provided in the acoustic piano. For example, the soundboard is driven by a soundboard drive signal KDS via a piece and sends out an acoustic output.

  FIG. 4 is a block diagram showing a first embodiment of the soundboard drive signal generating means 13. The soundboard drive signal generation unit of the first embodiment includes a formant correction processing unit 41, a delay RAM 42, a filter unit 43, and an adder 44.

  The batting signal SW extracted by the batting signal extraction means 11 is input to the formant correction processing unit 41. The formant correction processing unit 41 is configured by a digital filter having a frequency characteristic such as an FIR filter or an IIR filter that matches the formant characteristic of the batting signal SW with the formant characteristic of the piano sound corresponding to the operated key. Due to this frequency characteristic, the batting signal SW is shaped into a corresponding piano sound formant.

  The batting signal SW subjected to formant correction by the formant correction processing unit 41 is given to the adder 44 and added with the signal fed back from the filter means 43. The output of the adder 44 is transmitted as a soundboard drive signal KDS and input to the delay RAM 42.

  The signal DW delayed by the delay RAM 42 is input to the filter means 43. The output of the filter means 43 is given to the adder 44. The filter means 43 is controlled by a damper signal DP, thereby realizing a damper function.

  In the above configuration, the adder 44, the delay RAM 42, and the filter means 43 form a closed loop, and the soundboard drive signal KDS having a pitch corresponding to the delay time fed back by the closed loop is generated.

  Further, the filter means 43 gives a phase characteristic and an amplitude characteristic to the soundboard drive signal KDS. Thereby, the frequency shift of the harmonic overtone with respect to the fundamental tone and a different attenuation characteristic for each overtone are realized. That is, the filter means 43 has the following two functions in addition to giving a pitch to the hit signal SW.

The first is the phase characteristics of the soundboard drive signal KDS in order to realize the frequency shift of the overtone by the B value that is determined by the physical properties of the strings (core wire diameter, wound string diameter, effective string length, etc.) that are different for each key. It is a function to give. That is, when the frequency of the fundamental tone and the frequency of f _0, n harmonic and f _0n, deviation occurs in the frequency of the n harmonics according to the relationship _{f 0n = nf 0 (1 +} Bn 2) 1/2 is an acoustic piano . The first function is a function of giving a phase characteristic to the soundboard drive signal KDS and simulating a frequency shift in overtones to that of an acoustic piano.

  The second function is to provide a different attenuation characteristic for each harmonic. In other words, in an acoustic piano, the decay characteristics of the musical sound generated when a key is played differ from harmonic to harmonic. The second function is a function that imparts an amplitude characteristic to the soundboard drive signal KDS and simulates an attenuation characteristic that differs for each harmonic over that of an acoustic piano.

  FIG. 5 is a block diagram showing a configuration when the filter means 43 of FIG. 4 is configured with an FIR filter and a multiplier. In FIG. 5, the same or equivalent parts as in FIG.

  The signal DW delayed by the delay RAM 42 is input to, for example, an FIR filter 43-1 configured by a convolution processing circuit. The output CW of the FIR filter 43-1 is multiplied by the damper signal DP from the damper signal generating means 12 by the multiplier 43-2 and then given to the adder 44. The multiplier 43-2 multiplies the signal CW by the damper signal DP to generate a fast decay waveform (stop sound control waveform) at the time of key release.

  FIG. 6 is a block diagram showing a configuration when the filter means 43 of FIG. 4 is configured with an FIR filter and an IIR filter. In FIG. 6, the same or equivalent parts as in FIG.

  The signal DW delayed by the delay RAM 42 is input to the FIR filter 43-1. The output CW of the FIR filter 43-1 is input to the IIR filter 43-3. The IIR filter 43-3 is a low-pass filter, and its cutoff frequency is controlled by the damper signal DP. The output of the IIR filter 43-3 is given to the adder 44. As the IIR filter, for example, a digital filter circuit described in JP-A-5-35277 can be used.

  FIG. 7 is a block diagram showing the configuration of a convolution processing circuit that can be used as the FIR filter 43-1. The convolution processing circuit having this configuration includes delay elements 71-1 to 71-n, multipliers 72-1 to 72-n and adders 73-2 to 73-n, and functions as an nth-order FIR filter.

  The delay elements 71-1 to 71-n sequentially delay the soundboard drive signal DW delayed by the delay RAM 42 by one sampling period (one clock) of the system sampling frequency. The multipliers 72-1 to 72-n respectively add values ir (j) (j = 1 to n) obtained from the impulse response waveforms to the soundboard drive signals delayed by the delay elements 71-1 to 71-n. Multiply. Adders 73-2 to 73-n add the outputs of multipliers 72-1 to 72-n. A signal CW after the convolution processing is transmitted from the adder 73-n.

  FIG. 8 is a waveform diagram showing a specific example of an impulse response waveform used in the convolution process. According to this waveform, it is assumed that the value ir (j) on the vertical axis is registered in advance in the table for the integer value j (j = 0 to 50) on the horizontal axis. The decimal part of the impulse response waveform data is 0, and n = 50. Since the phase characteristic and amplitude characteristic given to the soundboard drive signal KDS are different for each key, an impulse response waveform is prepared for each key. In the convolution process, ir (j) is read from the table and used as ir (j) in FIG. The phase characteristic and amplitude characteristic given to the soundboard drive signal KDS are determined by the data of this impulse response waveform (the value of ir (j) multiplied by the multipliers 72-1 to 72-n).

  The frequency of the soundboard drive signal KDS realized using the impulse response waveform data whose decimal part is 0 is discretized at the system sampling frequency. Therefore, delicate frequency control cannot be performed as it is.

When the frequency required for the soundboard drive signal KDS is f ₀ , the frequency f _{0 in} the relationship of f _s / (n + 1) <f ₀ <f _s / n is an integer value of f _s / f ₀ This can be realized by performing a convolution process with an impulse response waveform having a delay length and a group delay characteristic obtained by multiplying the fractional part by 2π. The group delay characteristic can be realized by giving a linear phase characteristic having a desired inclination.

The frequency f ₀ having such a relationship may be necessary due to tuning, for example. If the impulse response waveform data for this frequency f ₀ is obtained by calculation from the impulse response waveform data of the fractional part 0, it will be difficult to obtain by real time calculation. Also, if impulse response waveform data for the frequency f _{0 having} such a relationship is prepared in advance, it is necessary to register a large amount of data according to the frequency accuracy in tuning, which is not practical.

  The following explains how to register a small amount of data obtained by sampling the impulse response waveform in the table (impulse response waveform table) TBL in advance and obtain data for obtaining a high-accuracy frequency based on this data. To do.

  Here, it is assumed that the impulse response waveform data of FIG. 9 is registered in advance in the impulse response waveform table TBL. The impulse response waveform data in FIG. 9 is obtained by dividing the values for finer points 0, 1, 2,..., 800 by dividing the interval between sampling points (between the integer values on the horizontal axis) of the impulse response waveform in FIG. Have.

The frequency resolution div = 16 due to 16 divisions between points. Here, for example, if the order n = 50 of the convolution processing, the impulse response length irl = 50, the system sampling frequency f _s = 50 kHz, and the required frequency is f ₀ = 440 Hz, then f _s / f ₀ = 113.6363.

The delay time due to the convolution process is 50/2 = 25. Therefore, the delay RAM 42 gives a delay amount of a value “88” obtained by subtracting “25” from the integer part “113” of f _s / f ₀ . In other words, the soundboard drive signal KDS becomes the signal DW delayed by 88 sampling periods by the delay RAM 42. Next, the signal DW is delayed by 25 sampling periods in the convolution process, and becomes a signal CW delayed by a total of 113 sampling periods.

The impulse response waveform data can be calculated according to the following procedure. Here, data with a frequency resolution of div = 16 registered in advance in the impulse response waveform table TBL is used, and data not registered there is obtained by linear interpolation.
int = INT (div * (f s / f 0 -INT (f s / f 0))) (1)
_{frac = div * (f s /} f 0 -INT (f s / f 0)) - int (2)
for j = 1 to n
ir (j) = frac * TBL (div * j-int-1) + (1-frac) * TBL (div * j-int) (3)
next j

  Here, INT represents obtaining an integer part, and frac represents obtaining a decimal part. TBL (..) indicates that data is obtained from the impulse response waveform table TBL using ".." as an address.

  In the above (1) and (2), the integer part and the decimal part on the frequency resolution div are obtained. In (3) above, ir (j) that gives the phase change for the fractional part is calculated by linear interpolation of the data of the `` div * j-int-1 '' point and the `` div * j-int '' point. Yes. In this example, int = 10 and frac = 0.1818.

  According to the above method, data for obtaining a highly accurate frequency can be obtained in real time without registering a large amount of data in advance. The above-described method is also effective for changing the pitch with respect to the keystroke signal DW with time.

  FIG. 10 is a block diagram showing a second embodiment of the soundboard drive signal generating means 13. In FIG. 10, the same or equivalent parts as in FIG. The second embodiment is different from the first embodiment in that a multiplier 101 that multiplies the impact signal SW by a weighting coefficient V1, a multiplier 102 that multiplies the output of the filter means 43 that forms a closed loop by a weighting coefficient V2, and a multiplier. An adder 103 for adding the outputs of 101 and 102 is provided, and the output of the adder 103 is used as a soundboard drive signal KDS.

  According to this configuration, the balance between the hit signal SW and the attenuation signal obtained from the closed loop can be adjusted by the weighting coefficients V1 and V2.

  In the above, the keyboard instrument only needs to have one soundboard drive means 14, but a plurality of soundboard drive means are provided, and the soundboard drive signal generated by the soundboard drive signal generation means is used as an arbitrary soundboard. It is also possible to allocate to the driving means. Further, a soundboard driving means can be provided for each key. FIG. 11 is a block diagram showing an embodiment in which a plurality of soundboard drive means are provided and a soundboard drive signal allocation circuit for assigning soundboard drive signals to them is provided.

  For each key, a striking signal extraction means, a damper signal generation means and a soundboard drive signal generation means A0, A # 0, B0,..., C7 are provided, and a plurality of soundboard drive means 111, 112, 113,. , 11n, and the drive signal allocating circuit 110 connects them.

  The drive signal allocation circuit 110 allocates the soundboard drive signal generated for each key to the soundboard drive means 111, 112, 113,..., 11n according to a predetermined method. According to this configuration, for example, the soundboard can be driven at a driving position corresponding to each key, and a sound image at the time of performance can be faithfully reproduced.

  Although the embodiment has been described above, the present invention is not limited to the above embodiment, and various modifications can be made. For example, in the above-described embodiment, it is assumed that there is only one piano string, but the actual piano includes a key having two or three strings. FIG. 12 is a block diagram showing an embodiment of the present invention corresponding to three strings.

  The soundboard drive signal generation means 13 of this embodiment includes three soundboard drive signal generation circuits 13-1, 13-2, 13-3. The damper signal DP is input to these soundboard drive signal generation circuits 13-1, 13-2, 13-3 in common. The soft pedal effect can be obtained by making the batting signal SW from the batting signal extracting means 11 different according to the operation of the soft pedal and inputting it as the batting signals SW1, SW2, SW3. The soundboard drive signals KDS1, KDS2, and KDS3 generated by the soundboard drive signal generation circuits 13-1, 13-2, and 13-3 are added, and the soundboard drive signal KDS thus obtained is added to the soundboard drive means 14. To provide an acoustic output corresponding to three strings.

  Note that one of the soundboard drive signals KDS1, KDS2, and KDS3 can be obtained from another soundboard drive signal. Depending on the amount of operation of the soft pedal, for example, the soundboard drive signal KDS3 can be obtained by filtering the soundboard drive signal KDS1 + KDS2. The soft pedal effect can also be obtained by providing a striking signal extraction means corresponding to each of the three strings and extracting the striking signal independently.

  Even if the piano has only one string, it can be simulated more accurately by the acoustic output of the piano by considering the vibration mode (longitudinal vibration, lateral vibration, rotational vibration mode).

  Further, in order to obtain a sound-adjusting effect that adjusts to a desired tone color or changes the sound volume, a needle stick into a hammer is effective. In general, a hammer is made of felt and has an inner-hard / soft-soft structure (a structure where the inside is hard and the outside is soft), but the hardness of the hammer action is adjusted by inserting a needle into the hammer. The degree of impact can be changed, so that the tone and volume can be finely adjusted.

It is a block diagram which shows the structure of one Embodiment of the keyboard musical instrument which concerns on this invention. It is a figure which shows the specific example of the hit signal (waveform, spectrum) at the time of a hard hit. It is a figure which shows the specific example of the hit signal (waveform, spectrum) at the time of weak hit. It is a block diagram which shows 1st Embodiment of a soundboard drive signal production | generation means. FIG. 5 is a block diagram showing a configuration when the filter means of FIG. 4 is configured by an FIR filter and a multiplier. It is a block diagram which shows the structure at the time of comprising the filter means of FIG. 4 with the FIR filter and the IIR filter. It is a block diagram which shows the structure of the convolution processing circuit which can be utilized as a FIR filter. It is a wave form diagram which shows the specific example of the impulse response waveform used by a convolution process. FIG. 7 is a waveform diagram showing a specific example of an impulse response waveform obtained by dividing the impulse response waveform of FIG. 6 into 16 points between points. It is a block diagram which shows 2nd Embodiment of a soundboard drive signal production | generation means. It is a block diagram which shows embodiment which provided the soundboard drive signal allocation circuit. It is a block diagram which shows embodiment of this invention corresponding to 3 strings.

Explanation of symbols

  11 ... Impact signal extracting means, 12 ... Damper signal generating means, 13, 13-1, 13-2, 13-3 ... Soundboard drive signal generating means, 14, 111-11n ... Soundboard drive Means 41 ... Formant correction processing unit 42 ... Delay RAM 43 ... Filter means 43-1 ... FIR filter 43-2, 72-1 to 72-n, 101, 102 ... Multiplier, 43-3 ... IIR filter, 44,73-2 to 73-n, 103 ... Adder, 71-1 to 71-n ... Delay element, 110 ... Soundboard drive signal Allocation circuit

Claims (12)

Multiple keys,
A damper pedal,
Soundboard,
A striking mechanism consisting of action hammers and pseudo strings provided for each key,
A striking signal extracting means for extracting the striking state of the action hammer on the pseudo string as a striking signal including striking strength and each frequency component ;
Damper signal generating means for generating a damper signal in response to an operation of the key or the damper pedal;
Soundboard drive signal generating means for generating the soundboard drive signal having a pitch according to the operated key, with the impact signal and the damper signal as inputs.
Comprising soundboard drive means for driving the soundboard according to the soundboard drive signal;
The soundboard drive signal generating means includes an adder to which the striking signal is input, a delay means for delaying the output of the adder, and a phase characteristic and an amplitude characteristic to the output of the delay means to give to the adder Having a filter means;
The filter means is controlled by the damper signal;
A keyboard instrument characterized in that the phase characteristic gives a frequency shift of a harmonic over a fundamental tone of an acoustic piano, and the amplitude characteristic gives a different attenuation characteristic for each harmonic . Said filter means, according to claim 1, characterized in that it comprises a multiplier for outputting the adder by multiplying the damper signal to the output of the FIR filter and said FIR filter the output of said delay means is input Keyboard instrument. The filter means includes an FIR filter to which the output of the delay means is input and an IIR low-pass filter that filters the output of the FIR filter and outputs the filtered output to the adder, and the cutoff frequency of the IIR low-pass filter is the damper. The keyboard instrument according to claim 1 , wherein the keyboard instrument is controlled by a signal. The FIR filter, the keyboard instrument according to claim 2 or 3, characterized in that convolving the output of said delay means uses data previously registered in the table impulse response waveform. The FIR filter, the keyboard instrument according to claim 2 or 3, characterized in that convolving the output of said delay means using data and the interpolation data of previously registered impulse response waveform table. The pseudo strings, keyboard instrument according to any one of claims 1 to 5, characterized in that stiffness or natural frequency differs depending on the key. The damper signal generating means, keyboard instrument according to any one of claims 1 to 6, characterized in that it has a damper position detecting means for detecting the position of the damper to operate according to the operation of the damper pedal and the key. The damper signal generating means has a key pressing detecting means for detecting a key pressing depth of the key and a damper pedal detecting means for detecting an operation depth of the damper pedal, from the key pressing depth and the damper pedal operating depth. keyboard instrument according to any one of claims 1 to 6, characterized in that for generating a damper signal. Further comprising a sostenuto pedal, the damper signal generating means, to any one of claims 1 to 6, characterized in that for generating a damper signal in response to the operation of the key or the damper pedal or the sostenuto pedal The keyboard instrument described. Comprising a plurality of sound board drive signal generating means for each key, sound board drive signal generating means wherein the plurality of claims 1, characterized in that the damping characteristics are different from each other for each frequency shift and harmonic overtones 9 The keyboard instrument according to any one of the above. Claims 1, characterized in that with a sound board drive signal allocating means for the sound board drive signal generated by the sound board drive signal generating means for each key weighted addition to giving the sound board drive means 10 of the The keyboard instrument according to any one of the above. The action hammers, by needling, keyboard instrument according to any one of claims 1 to 11, characterized in that the hardness is adjusted.

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