JPH0795233B2 - Touch response device for electronic musical instruments - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch response device for an electronic musical instrument, and more particularly, tones and pitches of musical tones in accordance with an operating touch of a musical instrument such as keys of a keyboard musical instrument during performance. , An improved touch control method for controlling volume, etc.

[Prior art]

The touch response control of the electronic musical instrument includes initial touch control that controls the tone color, pitch, volume, etc. of the musical tone in accordance with the key pressing speed, and the key pressing force when the key is continuously pressed, There is after-touch control for controlling timbre and the like.

As the conventional technology related to this touch response control,
There are those disclosed in JP-B-61-14518 and JP-A-1-200289.

In Japanese Patent Publication No. 61-14518, initial touch data is formed by detecting a differential time difference between two contacts according to a key pressing speed, and a pressing force detection device having a piezoelectric element is provided for each key. , Which forms after-touch data according to a detection signal from the pressing force detector and controls the touch response.

Further, in Japanese Patent Laid-Open No. 1-200289, a pressing force detecting device that outputs first and second detection signals having different output response characteristics according to the pressing force of the key is provided for each key, and It is described that the touch response control is performed by using the detection signal as an initial touch signal and the second detection signal as an after touch signal.

In addition to this, as prior art relating to touch response control, there are those disclosed in Japanese Patent Laid-Open No. 59-105692 and Japanese Patent Publication No. 52-46088.

[Problems to be Solved by the Invention]

In all of the after-touch controls described in the above-mentioned related art, the absolute output of the after-touch signal is based on the state where the pressing force applied to the pressing-force detection device is zero (the state where the after-touch signal is not output). Depending on the magnitude of the value, increase or decrease the volume, pitch, tone color, effect, etc. of the musical tone in the positive direction (the direction larger than the normal output value when the after-touch control is not performed) with respect to the output value, Alternatively, it is increased / decreased in the negative direction (direction smaller than the normal output value when the after-touch control is not performed). That is, the after-touch control is performed only on one of the positive and negative sides with the normal output value such as the volume, pitch, tone color, and effect of the musical tone to be generated as a boundary.

Therefore, in the case of a natural musical instrument such as a piano or a violin, the volume and pitch after being pronounced can be freely increased or decreased in either the positive or negative direction (up or down) depending on the intention of the performer. In the electronic musical instrument of No. 2, since aftertouch control can be performed only in one direction side, it is impossible to freely raise and lower the volume, pitch, etc. like a natural musical instrument, and there is a problem that the performance expressing ability is poor.

The present invention has been made in view of the above points, and the volume, pitch, tone color, effect, etc. of a musical tone to be generated can be changed in either positive or negative direction by a touch signal that changes depending on the magnitude of the key pressing force. It is an object of the present invention to provide an electronic musical instrument that can perform touch control that can be increased or decreased even in the background.

[Means for Solving the Problems]

The present invention is a performance operating means that is operated during musical performance,
Touch data generation means for detecting an operation touch applied during operation of the performance operation means and outputting it as touch data; and offset value setting means for setting an offset value serving as a reference for the size of the touch data, It comprises a comparison means for comparing the touch data with the offset value and outputting the difference data thereof, and a tone generation means for controlling the tone to be generated according to the difference data output from the comparison means. It is a feature.

According to the embodiment of the present invention, the following can be considered. The touch data and the offset value are compared with each other after a lapse of a certain time from the time of outputting the key information signal. Also,
The true difference data is gradually output while interpolating the difference data. If the touch data exceeds the offset value before the elapse of a certain period of time, the comparison between the touch data and the offset value is started from that point. The offset value can be changed by tone color, key scaling, or other factors.

[Action]

Conventionally, the touch data output from the touch data generating means is based on the state where the pressing force is zero, and the musical tone is directly controlled by the absolute output value of the touch data.

On the other hand, according to the present invention, an offset value serving as a reference for the size of touch data is set, the touch data is compared with the offset value, and the difference data is output. Therefore, by setting the offset value to a desired value, when the touch data is larger than the offset value, the tone volume, pitch, tone color, effect, etc. are set in the positive direction according to the magnitude of the difference data between the two. You can increase and decrease with. vice versa,
When the touch data is smaller than the offset value, the tone volume, tone pitch, tone color, effect, etc. can be increased or decreased in the negative direction according to the magnitude of the difference data between the two. That is, according to the present invention, it is possible to perform the touch control which can increase or decrease the volume of the generated musical tone, the pitch, the timbre, the effect, etc., in the positive and negative directions with reference to the normal output values.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the embodiment shown in FIG. 1, the control of the entire electronic musical instrument is performed by a microprocessor unit (CPU) 10, a ROM 11 for storing a system program, data used for storing various data, and a working RAM 12 used as a working RAM.
It is performed by a microcomputer including and. This microcomputer has a data and address bus 13
Various devices such as a keyboard circuit 14, an operation panel 15, and a tone generator 17 that serves as a sound source are connected via the, and these devices are controlled by a microcomputer.

The keyboard circuit 14 includes a circuit composed of a plurality of key switches provided corresponding to each key of the keyboard that specifies the pitch of a musical tone to be generated. Based on the output of the keyboard circuit 14, the microcomputer performs pressed key detection processing and sound generation allocation processing for allocating a pressed key to any of a plurality of sound generation channels. In addition, if necessary, the key touch operation speed at the time of pressing
The process of generating ITD is performed. An after-touch sensor 21 that detects the pressing force when the key is continuously pressed and outputs after-touch data is provided in association with each key on the keyboard.

The operation panel 15 includes various operators for selecting, setting, and controlling tone color, volume, pitch, effect, etc., and is compatible with various natural musical instruments such as piano, organ, violin, brass instrument, and guitar. It has a tone color selection unit 16 for selecting a tone color and various other tone colors.

The conversion table 20 is composed of a ROM storing various data, and stores, for example, an offset coefficient for variably controlling the offset value OF according to a key code as described later.

The tone generator 17 is capable of simultaneously generating musical tone signals on a plurality of n channels, and the data and address bus 13
The key code KC of the key assigned to each channel given via, the key-on signal KON, the key-off signal KOF,
Initial touch data ITD, after touch data ATD,
The tone color selection signal TC and other data are input and a tone signal is generated based on these various data. In this embodiment, the number of channels that can be simultaneously pronounced is 16.

Any tone signal generation method in the tone generator 17 may be used. For example, a memory reading method for sequentially reading tone waveform sample value data stored in a waveform memory according to address data that changes corresponding to the pitch of a tone to be generated, or a predetermined frequency using the above address data as phase angle parameter data. A well-known method such as an FM method for performing a modulation calculation to obtain musical tone waveform sample value data or an AM method for performing a predetermined amplitude modulation calculation using the above address data as phase angle parameter data to obtain a musical tone waveform sample value data You may employ suitably.

The digital tone signal generated from the tone generator 17 is converted into an analog tone signal by the digital / analog (D / A) converter 18 and output to the sound system 19.

The sound system 19 is composed of a speaker, an amplifier and the like, and generates a musical tone according to the analog musical tone signal from the D / A converter 18.

The timer 22 periodically supplies an interrupt signal to the microcomputer, and in this embodiment, aftertouch data processing is executed by a timer interrupt.

Next, the concept of after-touch control in the present invention will be described in the second section.
A description will be given with reference to FIGS.

FIGS. 2 (a) and 2 (b) are diagrams showing the relationship between the output waveform of the after-touch data during the pressing of an arbitrary key and the offset value OF thereof. In the figure, the time when the key starts to be pressed is 0.

FIG. 2 (a) shows that after a certain time Tc has elapsed from the start of key-on, the after-touch data ATD1 has an offset value OF.
2B shows a case where the after-touch data ATD2 is smaller than the offset value OF.

In the case of FIGS. 2A and 2B, the after-touch data is treated as not being output until a certain time Tc has elapsed. That is, the after-touch control is not performed until the fixed time Tc has passed. Generally, this fixed time Tc may be a short time until the key is pushed down. This is to wait until a true after-touch detection output is obtained from the after-touch sensor 21.

After a certain time, aftertouch data
The values of ATD1 and ATD2 and the offset value OF are compared, and the difference value, that is, the offset value OF from the after touch data ATD.
The value obtained by subtracting (AT-OF) is output to the tone generator 17 as data for after-touch control. Therefore, the second
If the after-touch data ATD is larger than the offset value OF as shown in FIG. 2A, the difference value is output as a positive value, but as shown in FIG.
When ATD is smaller than the offset value OF, the difference value is output as a negative value. Therefore, the tone generator 17 can increase / decrease the volume, pitch, tone color, effect, etc. of a musical tone in either the positive or negative direction of a normal output value according to the positive or negative difference value.

At this time, as shown in FIGS. 2 (a) and 2 (b),
After Tc, aftertouch data ATD1 or ATD2
Is mostly larger or smaller than the offset value OF, the present invention does not immediately output the difference value (AT-OF) as after-touch data but interpolates the difference value to gradually obtain a true value. Interpolation processing is performed to bring it closer to after-touch data ATD.

In the figure, INP indicates the contents of the interpolation mode register,
When the after-touch data ATD1 is larger than the offset value OF as shown in FIG. 2A, "1" is stored in the register INP and the upward interpolation mode is set. As shown in FIG. 2B, when the after-touch data ATD2 is smaller than the offset value OF, "0" is stored in the register INP and the downward interpolation mode is set. When the interpolation process is completed, "2" is stored in the register INP, the mode in which the interpolation is not performed is performed, and the difference value (AT-OF) is output as it is.

Next, an example of the processing executed by the microcomputer will be described based on the flowcharts of FIGS. 3, 4, and 5.

FIG. 3 is a diagram showing an example of a main routine processed by the microcomputer.

In "initialization", a predetermined value is set to all data of the microcomputer when the power is turned on. After that, the "key depression processing routine" and "timbre selection processing routine"
And various other processes are repeatedly executed. When an interrupt signal is given from the timer 22 in the middle of this main routine, the after-touch processing shown in FIG. 6 is performed by the timer interrupt each time.

In the “key-depression processing routine”, key-depression detection processing and sound generation allocation processing are performed based on the output of the keyboard circuit 14. This example is the fourth
As shown in the figure.

In the “tone color selection processing routine”, the tone color selection processing is performed when the tone color selection operation is performed by the tone color selection unit 16 of the operation panel 15. An example of this is shown in FIG.

In the "other various processing routines", processing based on the operation of other operators on the operation panel 15 and various other processing are performed.

Next, the processing contents of each step of the "key depression processing routine" will be described in order with reference to FIG.

Step 51: Scan each key switch in the keyboard circuit 14 to detect the presence or absence of a key-on event. A key-on event is detected when the key is depressed, and a key-off event is detected when the key is released. If there is a key-on event (YES), proceed to the next step 52 and subsequent steps, and if there is no key-on event (NO), step 510.
Proceed to.

Step 52: Sound generation assignment processing is performed according to the result of the key scan in step 51. That is, the channel to which the newly pressed key is assigned for sounding is determined, and the channel is designated by the channel number i.

Step 53: Set "1" to the key-on register KONi corresponding to the channel number i of the channel assigned in step 52. As a result, the channel number i
The CPU 10 can recognize that the key assigned to the key is being depressed.

Step 54: The key code of the new pressed key assigned in Step 52 is assigned to the key buffer KC corresponding to the channel number i.
Store in i.

Step 55: Convert the offset coefficient corresponding to the key code stored in the key buffer KCi in Step 54 into the conversion table 20.
Read from each offset coefficient register OFcvi, OFc for volume, tone color and pitch control corresponding to the channel number i.
Store in ti and OFcpi.

The conversion table 20 stores key scaling values of offset coefficients for volume control, tone color control, and pitch control. FIG. 7 shows an example of three types of offset coefficients stored in the conversion table 20. In this example, the volume offset coefficient OFcv is a value that decreases as the key code increases (that is, becomes treble) (the proportional constant depends on a negative linear function), and the tone offset coefficient OFct has a large key code. The pitch offset coefficient OFcp increases in a quadratic function as the key code becomes smaller (bass) when the key code becomes smaller (bass). However, it is a value that decreases as a quadratic function as the key code becomes larger (treble becomes higher). That is, in the case of a pitch, the offset coefficient is increased on the low tone side to easily lower the pitch, and conversely, on the high tone side, the offset coefficient is lowered to increase the pitch easily. This enables control closer to a natural musical instrument.

The volume offset coefficient register OFcv, the tone color offset coefficient register OFct, and the pitch offset coefficient register OFcp are provided for each channel. Therefore, among these offset coefficient registers, the offset coefficient registers OFcvi, OFcti and OFcp assigned to the channel number i are
Each volume offset coefficient, tone color offset coefficient, and pitch offset coefficient corresponding to the key code are stored in i.

The offset coefficient table as shown in FIG.
That is, a more natural musical instrument-like feeling can be obtained by preparing a plurality of instruments according to the timbre. For example, in the case of a trumpet, the offset coefficient is set high overall, making it easy to lower the pitch, and in the case of a violin, the offset coefficient is set low overall, making it easy to raise the pitch. It is possible to perform control closer to the sound of a natural musical instrument.

Step 56: Reference offset value registers OFsv, OFst and O
For each reference offset value for volume, tone color, and pitch control stored in Fsp, each offset coefficient register OFcv
i, OFcti, and OFcpi are multiplied, and the volume offset value register OFvi, tone color offset value register OFti, and pitch offset value register OFpi of each channel number i are multiplied.
To store.

Step 57: Calculate the initial touch data ITD and store it in the initial touch data register ITi of the corresponding channel number i.

Step 58: The contents of the key-on register KONi, the key buffer KCi, and the initial touch data register ITi are sent to the tone generator (sound source) 17. Based on this, the tone generator 17 generates a tone signal having a pitch corresponding to the key code of the key buffer KCi at the channel number i.

Step 59: Reset the time measurement counter Ti and start measuring the elapsed time after key-on.

Step 510: If it is determined in step 51 that there is no key-on event, or if the process of step 59 is complete, this step 510 is entered, in which the presence or absence of a key-off event is detected. When there is no key-off event (NO)
Ends and jumps directly to return. If there is a key-off event (YES), the process proceeds to the next step 511.

Step 511: Search for a channel to which a key code that matches the key code having the key-off event is assigned.

Step 512: As a result of the search in step 511, it is detected whether or not there is a channel that matches the key code of the key-off event. If there is no corresponding channel, the process ends and jumps to return. If there is a corresponding channel, go to the next step 513.

Step 513: Set "0" to the key-on register KONj corresponding to the channel number j searched in step 511. As a result, the pressing of the key assigned to the channel number j is released, and it is instructed that the key is released.

Step 514: The key-off signal is output to the j-th channel of the tone generator 17, and the decay sound generation mode after key release is set.

The processing contents of each step of the "tone color selection processing routine" will be described with reference to FIG.

Step 61: Detect the presence or absence of a tone color selection event. This tone color selection event occurs when the tone color selection unit 16 performs some tone color selection operation. If there is a timbre selection event (YES), the process proceeds to the next step 62, and if no (NO), the process jumps to return.

Step 62: When there is a tone selection event, the reference offset values for volume, tone, and pitch control corresponding to the selected tone are read from the conversion table, and the volume, tone, and
It is stored in each reference offset value register OFsv, OFst and OFsp for pitch control.

Step 63: Output the tone color data TC corresponding to the selected tone color to the tone generator 17.

FIG. 6 is a diagram showing details of the after-touch processing routine. This routine is a process executed every time an interrupt signal is given from the timer 22.

Step 71: Set 1 in the channel number register n.

Step 72: It is detected whether or not "1" is set in the key-on register KONn corresponding to the channel number stored in the register n. When "1" is set (YES), it means that the key assigned to this channel is continuously pressed, and the process proceeds to the next step 73 to execute the after-touch process. If "1" is not set (NO), it means that the key has been released, so there is no need to perform aftertouch processing.
Jump to step 719 to advance the channel number n.

Step 73: Read the after-touch data ATD of the key assigned to the corresponding n-th channel and store the value in the after-touch register ATn.

Step 74: Compare the value of the time measurement counter Tn (corresponding to Ti in FIG. 4) indicating the time elapsed after the key depression for the n-th channel with the constant time Tc, and if Tn is smaller than Tc (in the case of NO) ) Proceeds to step 79, if larger (YES)
Proceeds to step 75.

Step 75: When the value of the time measuring counter Tn is larger than the fixed time Tc (that is, when the fixed time Tc has passed),
The value of the interpolation mode register INPn of the channel n is "1".
Detect whether or not. If "1" (YES)
Goes to the step of creating interpolation data in the upward interpolation mode, otherwise goes to step 713.

Step 76: Create interpolation data in the upward interpolation mode. For example, each offset value register of the channel
The upward interpolation data is obtained by incrementing each offset value read from OFvn, OFtn, OFpn (see step 56 in FIG. 4) as an initial value by 1 or a predetermined value according to a predetermined interpolation function (for example, a linear interpolation function). Create each.

Step 77: It is detected whether or not the created upward interpolation data is smaller than the value of the after touch data in the after touch register ATn. If it is smaller (YES), the interpolation data has not yet reached the after-touch data, so proceed to step 78. If it is larger (NO), the interpolation data has reached the after-touch data, so proceed to step 717. move on.

Step 78: Subtract the offset values (typically indicated by OFn) of the offset value registers OFvn, OFtn, and OFpn corresponding to the respective interpolation data for volume, tone color, and pitch control created in Step 76. , Its value (interpolation data −O
Fn) is converted to volume, tone color, and pitch control data and output to the tone generator 17, and the process proceeds to step 719. Here, the difference value (interpolation data-OFn) is a positive value,
After-touch control for controlling the volume, tone color, pitch, etc. in the forward direction can be performed.

Step 79: It is detected whether or not the value of the time measuring counter Tn is the constant time Tc. If Tn matches Tc (YES
In the case of), the process proceeds to step 710, and the type of interpolation (upward or downward) is determined. If Tn has not reached Tc (NO), the process jumps to step 719.

Step 710: It is detected whether the after-touch data ATD in the after-touch register ATn is larger than the offset value OFn.

Step 711: If the after-touch data ATD is larger than the offset value OFn of the channel n, set "1" to the interpolation mode register INPn of the channel n to indicate that the type of interpolation is upward interpolation. , Step 719 is executed.

Step 712: After touch data ATD is offset value OFn
If it is smaller than 0, "0" is set in the interpolation mode register INPn to indicate that the type of interpolation is downward interpolation, and the process proceeds to step 719.

In this example, the offset value OFn has three types (OFvn, OFtn, OFpn) for volume control, tone color control, and pitch control. The mode register INPn also stores the interpolation mode for each. However, the details are omitted in the description, and only one series is shown as a representative.

Step 713: Here, it is detected whether or not the value of the interpolation mode register INPn is “0”. If "0" (in the case of YES), that is, in the downward interpolation mode, the process proceeds to step 714, and if not (in the case of NO), the process proceeds to step 718.

Step 714: Create downward interpolation mode data. For example, each offset value register OFvn, OF
By decrementing each offset value read from tn and OFpn by 1 or a predetermined value as an initial value, downward interpolation data is created.

Step 715: It is detected whether the created downward interpolation data is larger than the value of the after touch data in the after touch register ATn. If it is larger (YES), the interpolation data has not reached the after-touch data, so the process proceeds to step 716. If it is smaller, the interpolation data has reached the after-touch data, so the process proceeds to step 717.

Step 716: subtract the offset value registers OFvn, OFtn, OFpn (these are representatively indicated by OFn) from the respective interpolation data for volume, tone color, and pitch control created in step 714, The value (interpolation data-OFn) is converted into volume, tone color, and pitch control data, which are output to the tone generator 17, and the process proceeds to step 719. Here, the difference value (interpolation data-OFn) becomes a negative value, and the after-touch control is performed to control the volume, tone color, pitch, etc. in the negative direction.

Step 717: Here, "2" is set in the interpolation mode register INPn, and the process proceeds to step 718. When the interpolation register INPn is "2", it indicates that the interpolation process is completed.

Step 719: Add 1 to the content of the channel number register n and increment the channel number by 1.

Step 720: It is detected whether the value of the incremented register n is smaller than the maximum number of channels 16, and if it is smaller (in the case of NO), the process returns to step 72, and the same processing as described above is performed for the incremented channel number n. If it is larger (YES), the after-touch processing of all channels has been completed, so the routine returns and returns to the main routine.

Note that, in steps 75 to 78, 713 to 716, and 717 to 718 of FIG. 6, it is assumed that the interpolation mode is the same for the same channel for the sake of simplicity of description, but in reality, the volume and tone , Independent offset values OFvn, OFt for pitch control
Since n and OFpn are used, the respective interpolation modes may be different. To deal with this, each offset value
Steps 75-77 and 713 for OFvn, OFtn and OFpn respectively
Program should be configured to perform ~ 715 and 717-718. Detailed illustration in that case is omitted.

In the above embodiments, the control of the present invention is performed by software processing, but dedicated hardware may be configured to perform the same control.

In the above-described embodiment, the after-touch control target is the three types of musical tone elements such as volume, tone color, and pitch, but the present invention is not limited to these, and various effects such as vibrato may be similarly controlled. Good. Further, only one of the musical tone elements such as volume, tone color, pitch, and effect may be the control target of aftertouch. Further, each musical sound element may be controlled by common after-touch data instead of being controlled by individual after-touch data.

In the embodiment, the case where the number of channels is 16 has been described, but the number of channels is not limited to this, and a single tone or another number of channels may be used.

The after-touch sensor 21 may be provided independently for each key or may be common to a plurality of keys.

In the embodiment, the reference offset value is variably controlled by the offset coefficient, but the control by the offset coefficient may be omitted. Further, a plurality of reference offset values may be stored in a table without being controlled by the offset coefficient, and this may be selectively read by key scaling. Further, a plurality of offset coefficients and reference offset values may be prepared so that they can be arbitrarily selected.

In the above embodiment, the parameters for setting the offset value are the selected tone color type, the key scaling and the type of the musical tone element to be controlled (volume, tone color, pitch, etc.),
It may be a factor other than this. For example, it may be freely set by operating the operation element according to the player's intention.

The variable control of the offset coefficient by the key scaling, that is, the variable control pattern of the offset value is not limited to that shown in FIG. 7, but may be arbitrarily set by the type of musical instrument or the player.

Although the offset value and the offset coefficient stored in the conversion table are used in the above description, the offset value and the offset coefficient are not limited to this and may be obtained by an appropriate calculation process.

In the embodiment shown in FIG. 2, after-touch control is performed after a certain time Tc has elapsed after the key is pressed. However, as shown in FIG. When the value of reaches the offset value OF, the after-touch control may be started from that point. In this case, the above-mentioned interpolation processing is unnecessary. Further, in the embodiment of FIG. 2, the interpolation processing is performed linearly, but the interpolation curve is made non-linear, and the output is gradually changed after a certain time Tc has elapsed, for example, as shown in FIG. 8 (b). It may be possible to smoothly connect to the after-touch data. Further, in the embodiment shown in FIG. 2, the offset value is interpolated to shift to the after-touch data after the elapse of the fixed time Tc, but it may be shifted to the after-touch data with the elapse of the fixed time Tc without interpolation. .

Further, the present invention may be carried out in synchronization with the timing of the tone generator 17 (for example, sounding of a musical sound) without particularly measuring the fixed time Tc.

In the embodiment, the control in the positive direction is performed when the after-touch data is larger than the offset value, and the control in the negative direction is performed when the after-touch data is smaller than the offset value.

In the above embodiment, the electronic musical instrument for designating a desired musical tone by the keyboard is explained, but the musical instrument setting means for musical tone setting is not limited to this, and a musical instrument other than the keyboard may be used. The same can be applied to a module unit or the like. In the present invention, the key is not limited to the key on the keyboard, but includes other musical sound designation operation means. Further, the operation means for designating the musical sound may be provided with an operation means for touch response separately to detect an after-touch applied to this operation means.

Further, the offset value may not be constant and may be changed as a function of time with the passage of time.

〔The invention's effect〕

According to the present invention, the sound volume, pitch, tone color, effect, etc. to be produced can be increased or decreased in any of the positive and negative directions by the touch signal that changes according to the magnitude of the pressing force of the key.
It is possible to provide an electronic musical instrument that can produce a more natural musical instrument.

[Brief description of drawings]

FIG. 1 is a block diagram showing a hardware configuration of an embodiment of an electronic musical instrument according to the present invention, and FIGS. 2 (a) and 2 (b) are output waveforms of after-touch data for explaining the purpose of the present invention. FIG. 3 is a flow chart showing an example of the main routine processed by the microcomputer of FIG. 1, and FIG. 4 is a detailed example of the key depression processing routine of FIG. 5 is a flowchart showing a detailed example of the tone color selection processing routine of FIG. 3, FIG. 6 is a flowchart showing a detailed example of an after-touch processing routine executed by a timer interrupt, and FIG. The figure which shows an example of the key scaling table of the offset coefficient stored in the conversion table of FIG. 1, FIGS. It is a figure which shows another example of switch data processing. 10 …… CPU, 11 …… Program ROM, 12 …… Data and working RAM, 13 …… Data and address bus, 14 ……
Keyboard circuit, 15 ... Operation panel, 16 ... Tone selection section, 17 ...
… Tone generator, 18 …… D / A converter, 19 …… Sound system, 20 …… Conversion table, 21 …… After touch sensor, 22 …… Timer

Claims (1)

[Claims] 1. A performance operating means for operating a musical tone performance, a touch data generating means for detecting an operation touch applied during the operation of the performance operating means and outputting it as touch data, and a size of the touch data. Offset value setting means for setting a reference offset value, comparison means for comparing the touch data with the offset value and outputting the difference data, and a musical tone to be generated is output from the comparison means. A touch response device for an electronic musical instrument, comprising a musical tone generating means for controlling according to difference data.