JP2004294833A - Electronic piano - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To generate a tone including sound based upon shock vibration of other strings generated prior to vibration of string hitting when a damper pedal is operated. <P>SOLUTION: A position detection sensor 24 outputs a signal corresponding to the quantity of depression of a key. A key-on signal generation part 27 compares the output of the position detection sensor 24 with reference values α2 and α3 (α2<α3) and outputs a key-on signal when the sensor output reaches each reference value. When a pedal signal is on, the reference value α2 is outputted and the key-on signal is outputted earlier than when the pedal signal is off (reference value α3). An envelope generation part 30 generates a control parameter for generating an envelope of a two-stage attack when the pedal signal is on. An envelope addition part 28 adds the envelope to waveform data read out of a waveform memory 5 with the key-on signal. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electronic piano, and more particularly, to an electronic piano suitable for reproducing a sound generated when a user hits a key using an acoustic piano using a damper pedal or a sostenuto pedal.
[0002]
[Prior art]
In an acoustic piano, a damper pedal is provided in order to maintain the vibration of a struck string and to provide an effect of vibrating another string. When the damper pedal is depressed, the dampers are forcibly released from all the strings, so that the vibration of the strings is not stopped even after the key is released, and the sound continues. It is known that an electronic piano reproduces a sound generated when a damper pedal is depressed. In an electronic piano, a control signal is supplied to musical tone data read from a waveform memory in response to operation of a pedal device, and signal processing for a pedal effect is performed by a digital signal processor (DSP). An electronic piano that can provide a pedal effect is disclosed in, for example, Japanese Patent Application Laid-Open No. 7-219530.
[0003]
[Problems to be solved by the invention]
The damper pedal is depressed prior to keying. Since the action is performed in response to a keystroke and the string is struck thereby, there is a period from when the damper pedal is depressed until the string corresponding to the keystroke vibrates to sound. According to the experiment of the inventor, when the damper pedal is depressed, it is observed that many strings other than the striking string start to vibrate before the striking string starts to vibrate. It is thought that before the hammer hits the string due to the action, the impact of the key stroke or the vibration caused by the action propagates to the other strings, other than the stringed string, where the damper is off, causing this vibration. Can be Hereinafter, in this specification, the vibration caused by the impact of a keystroke is referred to as an impact vibration.
[0004]
FIG. 10A is a diagram illustrating a vibration waveform of a string striking when a damper pedal is used, and FIG. 10B is a diagram illustrating a vibration waveform of another string different from the string striking. The striking string is an E4 string, and the other strings are C4 strings. In both figures, the point P0 is the vibration start position of the E4 string. As shown in the drawing, the C4 string also vibrates in resonance with the vibration of the E4 string from the striking start position P0 of the E4 string. Further, the C4 string, which is another string, starts to vibrate before the string vibration start position P0, that is, while the E4 string is not vibrating.
[0005]
The impact vibration has a wide directional angle because it is generated almost simultaneously by all the strings at the position where each string is stretched. Further, following the impact vibration, the vibration due to the string resonance that occurs when the vibration of the struck string is transmitted to another string causes “hearing” around the position of each string. The vibration due to the string resonance is gradually amplified through the pieces, the frame, and the housing, and is most resonated by the soundboard. Then, a plurality of sound images including a sound image corresponding to “hearing” around each of the strings form a sound image by one soundboard. In the process of synthesizing a plurality of sound images, the sound images cause "hearing" with a sense of modulation. The plurality of sound images attenuate while being united into one, and the “hearing” disappears.
[0006]
Even when playing with a sostenuto pedal, the shock vibration exists because the damper comes off before the key is hit. As described above, when the pedal is used, an impact vibration occurs before the start of the stringing vibration. However, the conventional electronic piano does not consider the vibration before the start of the stringing vibration, and cannot reproduce the "hearing" due to the impact vibration before the keying.
[0007]
The present invention has been made in view of the above circumstances, and has as its object to provide a pedal effect generation device for an electronic piano, which can generate a musical sound in consideration of impact vibration before a keystroke.
[0008]
[Means for Solving the Problems]
The present invention for solving the above problems and achieving the object is provided with envelope control means for adding an envelope to a musical sound waveform, and includes a case where a pedal is depressed and a case where the pedal is not depressed. The first characteristic lies in that the envelope added by the envelope control means is made different.
[0009]
Further, the present invention is characterized in that the envelope added by the envelope control means when the pedal is depressed has a two-stage attack consisting of a gentle rising portion and a sudden rising portion thereafter. There are features.
[0010]
Further, the present invention has a third feature in that a means is provided for starting the envelope rising earlier when the pedal is depressed than when the pedal is not depressed.
[0011]
Further, the present invention has a fourth feature in that the present invention includes a depression amount detecting means for detecting the depression amount of the pedal, and the degree to which the start of the envelope is started earlier is increased in accordance with the depression amount of the pedal. .
[0012]
According to the first to fourth features, different envelopes can be added to the waveform data when the pedal is depressed and when the pedal is not depressed. In particular, according to the second feature, the impact portion of the envelope that rises slowly can simulate the impact vibration sound of another string that occurs prior to the vibration of the striking string. Further, according to the third and fourth features, since the impact vibration sound of the other string can be generated before the striking sound, it is possible to further resemble the performance of an acoustic piano.
[0013]
The present invention also provides a first waveform data storage means for storing waveform data of a striking sound, a second waveform data storage means for storing waveform data of an impact vibration sound of another string generated prior to the striking sound, When the pedal is not depressed, the waveform data of the stringing sound is read out in response to a keystroke to form a musical tone signal. On the other hand, when the pedal is depressed, the waveform of the stringing sound is generated in response to a keystroke. A fifth feature of the present invention is that it comprises means for reading out the data and the waveform data of the impact vibration sound to form a tone signal.
[0014]
Further, the present invention has a sixth feature in that when the pedal is depressed, the waveform data of the shock vibration sound is read out before the waveform data of the striking sound.
[0015]
According to the fifth and sixth features, the waveform data for forming the stringing sound and the impact vibration sound of the other strings generated prior to the stringing sound are stored in advance, and when the pedal is depressed, both of these are stored. By reading the waveform data, a tone signal is formed. In particular, according to the sixth feature, since the impact vibration sound of another string can be generated before the striking sound, it is possible to further resemble the performance of an acoustic piano.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 2 is a block diagram showing a hardware configuration of the electronic piano according to one embodiment of the present invention. In FIG. 2, a bus 1, a CPU 1, a RAM 2, a ROM 3, a program memory 4, a tone waveform memory 5, a tone generator 61, a signal processor 62, a keyboard interface 7, a pedal interface 8, a panel interface 9, and a DAC (digital / digital An analog converter 10 is connected. The signal processing device 62 can be configured by a DSP.
[0017]
A keyboard device 11 is connected to the keyboard interface 7, a pedal device 11 is connected to the pedal interface 8, and an operation panel 13 is connected to the panel interface 9, respectively. The keyboard device 11 includes a plurality (for example, 88) of keys (keys), and a key sensor for detecting on / off of each key and a speed of an on operation. The keyboard interface 7 generates key event information and touch information based on the output signal of the key sensor, and the information is stored in the RAM 2 in association with the key number.
[0018]
The pedal device 12 includes a damper pedal, a sostenuto pedal, and a pedal sensor having a volume that produces an output corresponding to the amount of depression of these pedals. The pedal device 12 is provided to reproduce the effect of depressing the pedal on the acoustic piano with the electronic piano. The DAC 10 is connected to a sound system 14 including an amplifier and a speaker. Speakers are provided for left and right, respectively.
[0019]
The CPU 1 controls each of the components according to a control program stored in the program memory 4. The tone waveform memory 5 stores waveform data corresponding to a plurality of timbres, and the ROM 3 stores parameters for processing the tone waveform data to generate a tone. The RAM 2 is used as a work area for temporarily storing various data when the CPU 1 executes a program. The operation panel 13 includes an LCD screen, various switches and a volume, and an indicator such as an LED, and is disposed on, for example, a control panel provided adjacent to the keyboard device 11.
[0020]
At the time of performance, the tone generator 61 reads out tone waveform data from the tone waveform memory 5 to the signal processor 62 in response to a keystroke. The signal processing device 62 performs processing such as envelope control and addition of an effect on the read musical sound waveform data to form a musical sound signal. The tone signal is converted to an analog tone signal by the DAC 10 and then supplied to the sound system 14. In the sound system 14, the analog tone signal is amplified by an amplifier and then generated by a speaker.
[0021]
The CPU 1 further changes the tone generation instruction timing as described later depending on whether or not a pedal is used, which is determined from a control signal (a pedal depressing signal by a pedal sensor) input from the pedal device 12, and changes the pedal of the pedal device 12 as described later. Envelope control differs between when used and when not used. Details will be described later.
[0022]
FIG. 3 is a sectional side view showing the structure of the keyboard device of the electronic piano. Each key 15 of the keyboard device 11 is supported by a balance pin 16 serving as a fulcrum, and a capstan screw 17 protruding upward is provided on the right side of the balance pin 16, that is, near the end of the key 15 in the depth direction. The frame 18 is provided with a hammer 20 extending substantially horizontally and capable of swinging up and down around a shaft 19 provided near the frame 18. An action weight 21 is provided near the tip of the hammer 20. On the other hand, a counterweight 22 is provided in a suspended state at a position of the key 15 to the left from the balance pin 16, that is, near the end in the front direction of the key 15. Further, the frame 18 is provided with a stopper 23 for preventing the action weight 21 from jumping upward too much. When the key 15 is not depressed, the side on which the counter weight 22 is provided is in a raised position.
[0023]
When the key 15 is pressed during a performance, the front end of the key 15 is lowered around the balance pin 16, and the rear end of the key 15 is raised. At this time, the capstan screw 17 pushes up the hammer 20 provided with the action weight 21, so that the player feels the reaction force of the pushing up force as a touch.
[0024]
The bottom plate 181 of the frame 18 is provided with a position detection sensor 24 as a key sensor for detecting the amount of displacement of the key 15 in the vertical direction. The counterweight 22 provided on the lower surface of the key 15 is preferably made of a magnetic material such as iron, and a magnetic sensor that senses the magnetic material and generates an output is preferably used as the position detection sensor 24. Since the output of the magnetic sensor changes in accordance with the distance between the sensing unit and the magnetic body, the distance between the counter weight 22 and the position detection sensor 24 based on the output, that is, the bottom plate 181 or the front end of the bottom plate 181, The distance between the key 15 and the shelf 182 whose upper surface faces the lower surface of the front end of the key 15 can be detected.
[0025]
Note that the position detection sensor 24 is not limited to a magnetic sensor, and may be various position detection sensors such as an optical sensor and a vibration sensor. The shape and material of at least the surface of the counter weight 22 facing the position detection sensor 24 are changed by the selected sensor.
[0026]
FIG. 4 is a block diagram showing a system of the tone generation process. The musical tone waveform memory 5 stores musical tone waveform data of a piano sound. Based on the output of the position detection sensor 24, a key-on signal (including a key-on number) and a keying strength, that is, a velocity, are formed. The formation of the key-on signal and the velocity will be described later. The tone waveform memory 5 outputs tone waveform data to the envelope control unit 63 as a function of the signal processing device 62 according to the key-on signal. The musical tone waveform data is read out according to the frequency determined by the key-on number included in the key-on signal. The key-on number is determined by scanning an input port from each sensor to the CPU 1 to determine which of the position detection sensors 24 provided for each key 15 is outputting. The envelope control unit 63 determines the envelope of the read musical tone waveform data based on the envelope control parameters and the velocity. The velocity determines the maximum amplitude of the attack portion of the envelope.
[0027]
The pedal sensor 121 is provided for each of the damper pedal and the sostenuto pedal included in the pedal device 12. The depression detection unit 64 outputs a detection signal to the envelope control unit 63 when the depression amount of each pedal has reached the reference value for the depression determination. When the detection signal is input, the envelope control unit 63 switches the envelope for use of the pedal.
[0028]
When the pedal is used, as described above, an impact vibration sound due to a string other than the striking string is generated before the vibration of the striking string starts. Therefore, different envelopes are set in advance according to when the pedal is used and when the pedal is not used. select. For example, an envelope having a first attack portion where the attack portion rises gently and a second attack portion following the second attack portion which rises sharply are set as envelopes for use of the pedal (described later with reference to FIGS. 5 and 6). The tone signal to which the envelope has been added in this way is output from the sound system 14 via the DAC 10.
[0029]
FIG. 5 is a diagram showing a musical tone signal of a piano sound showing an envelope when the pedal is used and when the pedal is not used. FIG. 6A is a diagram showing an envelope when a pedal is not used. The amplitude of the envelope when the pedal is not used increases linearly because no step is provided in the attack portion AT. FIG. 5B is a diagram illustrating an envelope when the pedal is used. The attack portion of the envelope when the pedal is used includes a first attack portion AT1 and a second attack portion AT2. The first attack part AT1 corresponds to an impact vibration sound. In this example, the rising of the envelope is the same both when the pedal is used and when the pedal is not used. As described above, even when the envelope rises at the same time, that is, even when the musical sound generation time does not change, there is an effect of imitating an impulsive vibration sound to improve "hearing".
[0030]
Further, when the rising timing of the envelope is advanced when the pedal is used, compared to when the pedal is not used, the "hearing" can be more simulated as when using the pedal.
[0031]
FIG. 6 is a diagram illustrating an envelope in which the rising start timing is earlier when the pedal is used than when the pedal is not used. In the figure, when the pedal is used, the envelope rises earlier than the time when the pedal is not used by the amount of the first attack part AT1, that is, by the time T.
[0032]
A trigger for outputting the key-on signal can be obtained by the output of the position detection sensor 24. For example, three reference values (first reference value, second reference value, and third reference value) corresponding to the output of the position detection sensor 24 are set. The first reference value corresponds to the output of the position detection sensor 24 corresponding to the position where the key starts descending when the key is touched, and the third reference value corresponds to the output of the position detection sensor 24 corresponding to the lowest point position of the key. , The second reference value is set between the first reference value and the third reference value.
[0033]
If the start time of the envelope rise does not change between when the pedal is used and when the pedal is not used, a key-on signal is output as a tone generation instruction when the output of the position detection sensor 24 reaches the third reference value. On the other hand, in order to advance the attack timing when the pedal is used, a key-on signal is output as a tone generation instruction when the output of the position detection sensor 24 reaches the second reference value. Since the tone waveform data is read from the tone waveform memory 5 in response to the tone generation instruction and a tone signal is formed, the rising timing of the envelope is advanced. The second reference value is not a fixed value, but may be changed so as to approach the first reference value according to the amount of depression of the pedal. This is because, in an acoustic piano, when the pedal is used, the damper moves away from the string and the key touch becomes lighter, so that the velocity tends to increase even when playing with the same keying strength.
[0034]
FIG. 1 is a block diagram showing a function for switching the envelope. The reference value storage unit 25 stores a reference value to be compared with the output of the position detection sensor 24. The reference values are a first reference value α1, a second reference value α2, and a third reference value α3 (α3>α2> α1) for determining the depressed position of the key 15. The second reference value α2 may be a common value for the damper pedal and the sostenuto pedal, or may be an individual value for each. The pedal signal generator 26 outputs a pedal signal when the output of the pedal sensor 121 is a predetermined value.
[0035]
The reference value storage unit 25 outputs the first reference value α1 and the third reference value α3 when the pedal signal is off, and outputs the second reference value α3 instead of the third reference value α3 when the pedal signal is on. I do. The key-on signal generator 27 compares the second reference value α2 and the third reference value α3 with the output of the position detection sensor 24, and when the output of the position detection sensor 24 reaches the second reference value α2 and When the value reaches the value α3, a key-on signal (including a key-on number) is output. The tone waveform memory 5 outputs tone waveform data to the envelope adding section 28 in response to the key-on signal.
[0036]
The velocity calculator 29 calculates the velocity based on the time from when the output of the position detection sensor 24 changes from the first reference value α1 to the second reference value α2 or the third reference value α3 depending on whether the pedal signal is on or off. I do. The calculated velocity is input to the envelope adding unit 28.
[0037]
The envelope generation unit 30 stores envelope control parameters corresponding to when the pedal is used and when the pedal is not used. The envelope generator 30 selects an envelope control parameter for when the pedal is not used when the pedal signal is off, and selects an envelope control parameter for when the pedal is used when the pedal signal is on. The selected envelope control parameter is input to the envelope adding unit 28. The envelope adding unit 28 adds an envelope to the musical sound waveform data according to the input velocity and envelope control parameters, and outputs the data to the DAC 10.
[0038]
Note that the detected velocity can be increased according to the amount of depression of the pedal. This is because the amount of pressing of the damper against the strings is reduced by the amount of depression of the pedal, and accordingly, the key touch is lightened, and the velocity is substantially increased. For example, this can be realized by performing an operation (adding a correction value or multiplying by a correction coefficient) to increase the velocity calculated by the envelope calculation unit 29 in accordance with the amount of depression of the pedal.
[0039]
Next, a second embodiment of the present invention will be described. FIG. 7 is a block diagram showing a system of tone generation processing according to the second embodiment. The musical tone waveform memory 5 stores a first waveform data storage unit 51 for storing striking waveform data, and a second waveform for storing waveform data of impact vibration sound of another string (hereinafter, simply referred to as “impact acoustic waveform data”). And a data storage unit 52. The striking waveform data is waveform data of vibration generated by striking, and the impact sound waveform data is waveform data of sound generated by vibration of strings other than striking before striking.
[0040]
The direction control unit 31 is a processing unit for waveform data forming a sense of direction of sound, and the sound image control unit 32 is a processing unit for waveform data forming a direction and distance of sound. The direction control unit 31 and the sound image control unit 32 perform stringing waveform data and the like from the tone waveform memory 5 according to the pedal signal, the key-on signal, and the velocity input from the pedal signal generation unit 26, the key-on signal generation unit 27, and the velocity calculation unit 29, respectively. Read and process shock sound waveform data. The pedal signal generator 26, the key-on signal generator 27, and the velocity calculator 29 can be configured in the same manner as in the first embodiment.
[0041]
When the pedal signal is off, only the stringing waveform data is read out to the sound image controller 32 in accordance with the key-on signal. When the pedal signal is on, the impact sound waveform data is read out to the direction control unit 31 and the string striking waveform data is read out to the sound image control unit 32 according to the key-on signal.
[0042]
As the impact sound waveform data and the hitting waveform data, the impact sound waveform data may be read out to the direction control unit 31 first, and after a predetermined delay time, the hitting waveform data may be read out to the sound image control unit 32. In other words, it is possible to generate an impact vibration sound of another string first, and then generate a stringing sound in response to a keystroke.
[0043]
A trigger signal for generating an impact vibration sound and an instruction for generating a striking sound can be obtained from the output of the position detection sensor 24. For example, when the output of the position detection sensor 24 reaches the second reference value α2, an impact sound generation instruction is output, and when the output of the position detection sensor 24 reaches the third reference value α3, a striking sound generation instruction is output. Should be output. In response to each instruction, the waveform data is read from the first waveform data memory 51 and the second waveform data memory 52 to form a tone signal.
[0044]
Generally, with respect to sound, as time elapses from the time of sound generation, its direction is recognized first, and then a sound image is recognized. Since the shock vibration sound is a sound that is recognized only for a short time from the sound generation, the direction control is performed on the shock sound waveform data. On the other hand, since the striking sound includes long-lasting striking vibration and resonance vibration of other strings and a soundboard, the processing of the striking waveform data involves the generation of a sound image including the direction and distance of the sound. The waveform data processed by the direction control unit 31 and the sound image control unit 32 is input to the DAC 10 as a tone signal.
[0045]
FIG. 8 is a block diagram showing a main part of the direction control unit 31 for obtaining a sense of direction. In the figure, a direction control unit 31 simulates a head-related transfer function (HRTF) and convolves a transmission time difference and a volume difference of sounds recognized by the left ear and the right ear. Controls the arrival direction of the sound in a pseudo manner. The delay unit 33 forms a tone signal output to each of the left speaker and the right speaker of the sound system 14 based on the input shock sound waveform data. Each of the left and right tone signals is output with a delay time corresponding to the binaural time difference determined by the sound source direction, that is, the assumed direction of the strings of the piano, so that the player can recognize the arrival direction of the sound. Further, the level setting unit 34 sets the level (volume) of the input shock sound waveform data according to the assumed position of the strings of the piano. The delay unit 33 can be constituted by a high-order filter, and the level setting unit 34 can be constituted by a multiplier. Note that a control device for simulating a head acoustic transfer function to localize a sound image is disclosed in, for example, Japanese Patent No. 3090416 and Japanese Patent No. 3255348.
[0046]
The shock sound waveform data subjected to the delay processing and the level setting processing are output as tone signals for the left speaker and the right speaker, respectively, and input to the ADC 10.
[0047]
FIG. 9 is a block diagram illustrating a main part of the sound image control unit 32 for obtaining a sense of sound image. In the figure, a sound image control unit 32 forms a sound image sense by assuming an indoor space, and performing direction control of a direct sound and a reflected sound from a sound source, that is, a string struck by a hammer, in the assumed indoor space. . The first delay unit 35 divides the input striking waveform data into a direct sound and a reflected sound and delays them. This is because the distance from the player differs depending on whether the sound is a direct sound or a reflected sound, and the time until the sound is heard differs according to the distance. The first level setting unit 36 sets the level of the input string waveform data separately for a direct sound and a reflected sound. This is because the distance from the player differs depending on whether the sound is a direct sound or a reflected sound, and the audible volume differs according to the distance. The number n of reflected sounds corresponds to the number of assumed reflecting surfaces. The output signals of the first delay unit 35 and the first level setting unit 36 are the first, second, third,..., N-th direction control units 37-1, 37-2, 37-3,. Is input to
[0048]
The first to n-th direction control units 37-1 to 37-n are configured similarly to the direction control unit 31 described with reference to FIG. For example, the first direction control unit 37-1 includes a second delay unit 38 and a second level setting unit 39, and outputs a tone signal for two channels. The tone signals for two channels respectively output from the first to n-th direction control units 37-1 to 37-n are added to form a right tone signal and a left tone signal, respectively. Both tone signals are input to the sound system 14 via the DAC 10.
[0049]
In order to hasten the rise of the envelope when the pedal is used, a method of setting a reference value for judging the output level of the position detection sensor 24 is adopted, but this can be variously modified. For example, instead of providing the first to third reference values, three sensors having different distances from the key 15 are provided so that the output timings are different, and a key-on signal is output when each sensor outputs. be able to.
[0050]
In addition, a mechanism that allows a sensor that generates a key-on signal to approach the key 15 is provided, and the sensor approaches the key when the pedal is used. By doing so, the generation timing of the key-on signal can be advanced when the pedal is used.
[0051]
【The invention's effect】
As is apparent from the above description, according to the first to fourth aspects of the present invention, different envelopes can be added to the waveform data when a key is depressed with a pedal and when a key is depressed without a pedal being depressed. In particular, according to the second aspect of the present invention, since the rise of the attack portion is reduced, it is possible to simulate the impact vibration of another string, which is generated prior to the vibration of the struck string and is weaker than the vibration of the struck string. Further, according to the third and fourth aspects of the present invention, it is possible to more faithfully reproduce the impact vibration sound of another string which starts earlier than the vibration of the struck string.
[0052]
According to the fifth and sixth aspects of the present invention, since the waveform data of the striking sound and the impact vibration sound are separately provided, the impulsive vibration sound of another string generated separately from the striking sound and the striking sound is simulated. can do. In particular, according to the sixth aspect of the present invention, it is possible to more faithfully reproduce the impact vibration sound of another string which starts earlier than the vibration of the string.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating main functions of an electronic piano according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a main configuration of the electronic piano according to the embodiment of the present invention.
FIG. 3 is a sectional view of the keyboard device.
FIG. 4 is a block diagram showing a system of musical sound generation processing.
FIG. 5 is a diagram illustrating a first example of an envelope.
FIG. 6 is a diagram illustrating a second example of an envelope.
FIG. 7 is a block diagram showing a tone generation processing system according to a second embodiment of the present invention.
FIG. 8 is a block diagram illustrating a configuration of a direction control unit.
FIG. 9 is a block diagram illustrating a configuration of a sound image control unit.
FIG. 10 is a diagram showing a vibration waveform of a struck string and a string other than the struck string.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... CPU, 5 ... Musical sound wave memory, 11 ... Keyboard device, 12 ... Pedal device, 15 ... Key, 24 ... Position detection sensor, 26 ... Pedal signal generation part, 28 ... Envelope addition part

Claims (6)

In an electronic piano having a pedal,
Depression detection means for detecting depression of the pedal,
Envelope control means for adding an envelope to the musical sound waveform,
An electronic piano, wherein the envelope added by the envelope control means differs between when the pedal is depressed and when the pedal is not depressed. The envelope added by the envelope control means when the pedal is depressed,
2. The electronic piano according to claim 1, wherein the electronic piano has a two-stage attack consisting of a gentle rising portion and a sharp rising portion thereafter. 3. The electronic piano according to claim 1, further comprising: means for starting to start the envelope more quickly when the pedal is depressed than when the pedal is not depressed. Depressed amount detecting means for detecting the depressed amount of the pedal,
4. The electronic piano according to claim 3, wherein a degree of hastening the start of rising of the envelope is increased in accordance with an amount of depression of the pedal. 5. In an electronic piano having a pedal,
Depression detection means for detecting depression of the pedal,
First waveform data storage means for storing waveform data of a stringing sound;
Second waveform data storage means for storing waveform data of impact vibration sound of another string generated prior to the striking sound;
When the pedal is not depressed, the waveform data of the stringing sound is read out in response to a keystroke to form a musical tone signal, while when the pedal is depressed, the stringing sound is reproduced in response to a keystroke. Means for reading out the waveform data and the waveform data of the shock vibration sound to form a musical tone signal. 6. The electronic piano according to claim 5, wherein when the pedal is depressed, the waveform data of the shock vibration sound is read out before the waveform data of the stringing sound.

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