JPH0460590A - Electronic musical instrument - Google Patents

Abstract

PURPOSE:To enable performance with a key touch that a player images by using a touch curve represented by a function conforming with the key touch characteristic of the player. CONSTITUTION:The touch curve as the 1st function f(tn) is stored in a storage means and plural touch data tn from a touch sensor which correspond to the key depression of the player are processed statistically to obtain a statistic value, e.g. mean value tAV; and the input touch data tn for constituting a 2nd function f'(tn) corresponding to the obtained mean value tAV are converted into addresses to be supplied to the storage means. The converted addresses are used to generate a musical sound by using data read out of the storage means as touch data. Consequently, the sound is generated according to new touch curve shown by the 2nd function f'(tn) and the sound generation matching the key touch characteristic of the player become possible.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an electronic musical instrument, and in particular, to automatic conversion of touch data so that a player can play with a key touch that suits him or her. Regarding electronic musical instruments.

(Prior Art) Conventionally, in electronic musical instruments, a touch sensor detects the strength or speed of key depression (key touch) when a performer performs a performance, and the touch data obtained thereby is processed by a predetermined function f. (
t,) is supplied to a stored memory (referred to as a touch curve memory), the data is converted according to the function, and musical tones are generated based on the data obtained by this conversion, so that the performer's It is designed to generate a sound with a strength depending on the key touch.

However, the above function f(t,), that is, the data constituting the touch curve, is generally stored in a touch curve memory constituted by a fixed storage device such as a ROM. Therefore, only a certain fixed value according to the touch curve can be output for touch data detected by the touch sensor.

On the other hand, if a performer plays an electronic musical instrument with a key touch of a predetermined strength and the sound is produced at a volume that he or she did not expect, the performer may be forced to press the keys to play with a key touch that is appropriate for the characteristics of the electronic instrument. This forced me to change my touch, making it extremely difficult to play.

Therefore, in order to solve this problem, the touch curve is stored in a rewritable memory, for example, and the user (performer) can arbitrarily change this touch curve to suit his/her own key touch. Electronic musical instruments that can be edited have been developed.

However, in order to edit the touch curve to match the characteristics of the self-key touch, it is necessary to have sufficient knowledge about the touch curve and to perform detailed editing work, which is impractical.

(Problem H to be Solved by the Invention) The present invention has been made in view of the above circumstances, and allows the performer to play the key without having any knowledge of touch curves or without performing manual editing work. It is an object of the present invention to provide an electronic musical instrument that can easily obtain a touch curve that matches the touch characteristics and that can be played by touching the keys based on the player's image. (Means for) The electronic musical instrument of the present invention includes a storage means for storing data constituting the first function, a touch sensor for detecting the strength or speed of key depression, and touch data detected by the touch sensor. a calculation means for performing statistical processing to calculate statistical values; and a calculation means for calculating the touch data detected by the touch sensor according to the statistical values calculated by the calculation means, and converting the contents of the storage means to data constituting a second function. a converting means for converting the address into an address for reading as a second function; a reading means for supplying the address converted by the converting means to the storage means to read data constituting the second function; The present invention is characterized by comprising a musical tone generating means for generating a musical tone using the touch data as new touch data.

(Operation) The present invention provides a first function f(t
, ) in the storage means,
A plurality of touch data t from the touch sensor according to the player's key presses. is subjected to statistical processing to obtain a statistical value, for example, the average value t
Av is obtained, and the input touch data t is converted into an address given to the storage means in order to construct a second function f'(t,) corresponding to the obtained average value tAV. Here, the second function f'(t,) is, for example, touch data t, as shown in FIG. is less than the average value tAV, the touch data t0 is set to a numerical value f2'(t,) having a characteristic obtained by compressing the touch curve. such that the function f's'(to) has the function f's'(to). Then, using the converted address, the data read from the storage means is used as touch data to generate a musical tone.

As a result, the sound is emitted according to the new touch curve represented by the second function f'(t,), making it possible to emit sound that matches the key touch characteristics of the performer.

(Embodiment) FIG. 1 is a block diagram of essential parts of an embodiment of an electronic musical instrument according to the present invention.

In the figure, reference numeral 1 denotes an operation panel, which is provided with various switches such as a power switch, a mode designation switch, and a tone selection switch, as well as a display that displays the status of the electronic musical instrument.

Reference numeral 2 denotes a keyboard, which includes a plurality of keys and a detection circuit for detecting key depression/key release of the keys. This keyboard 2
The output of is supplied to the touch sensor 3.

Reference numeral 3 denotes a touch sensor, which is a well-known sensor that detects the strength or speed of key depression (key touch) from a signal output from the keyboard 2. Touch data t output by this touch sensor 3. is supplied to the input/output interface 4. Further, a key number indicating the number of a pressed or released key from the keyboard 2 is supplied to the CPU 5 via the touch sensor 3.

Reference numeral 4 denotes an input/output interface, which outputs switch data from the operation panel 1 or touch data tn from the touch sensor 3 to the bus 13, or receives and receives data from the bus 13 and sends it to the operation panel 1. It mediates the transmission and reception of signals.

5 is a CPU, and when a power switch (not shown) provided on the operation panel 1 is turned on, the program memory 6 is
It operates according to a control program stored in the controller and controls each part of the electronic musical instrument. The CPU 5 normally performs predetermined processing while executing the main program (see FIG. 3).

Reference numeral 6 denotes a program memory, which is composed of, for example, a ROM. The program memory 6 stores various programs such as the above-mentioned main program and subprograms, and also includes various fixed data necessary for the operation of the CPU 5.

7 is a working memory, which is constituted by, for example, a RAM. This working memo) is provided with registers necessary for processing by the CPU 5, an area for tables or flags, a buffer area for temporarily storing various data, and the like. The CPU 3 proceeds with processing according to the states of registers, flags, etc. provided in the working memory 7.

Reference numeral 8 denotes a touch curve memory, which is composed of, for example, a ROM. This touch curve memory 8 is shown in Fig. 1(a).
Data (touch curve) constituting the function f(t, , ) shown in is stored.

Reference numeral 9 denotes a sound source section, which generates analog musical tone signals under the control of the CPU 5 in accordance with given performance data. This sound source section 9 has a plurality of musical tone signal forming channels. The output of this sound source section 9 is supplied to the DAC10.

Reference numeral 10 denotes a D/A converter (DAC), which converts an analog musical tone signal supplied from the tone source section 9 into a digital musical tone signal. The output of this DAC 10 is supplied to an amplifier 11.

Reference numeral 11 denotes an amplifier that amplifies the digital musical tone signal output from the DACIO and supplies it to the sound system 12.

Reference numeral 12 denotes a sound system, which includes, for example, speakers or headphones. This sound system 12 outputs musical tones.

The input/output interface 4, CPU 5, program memory 6, working memory 7, and sound source section 9 are as follows:
They are interconnected by a bus 13.

Next, the operation of the above configuration will be explained with reference to the flowcharts of FIGS. 3 to 7.

FIG. 3 shows the main routine of the electronic musical instrument of the present invention.

When the electronic musical instrument is powered on, initial setting processing is first performed (step SL). That is, the internal registers of the CPU 5 are initialized, and the working memory 7
It sets the registers and flags defined in , to their initial values, and also initializes the specified hardware. This sets the initial tone, etc., and makes it possible to emit sound.

Next, it is checked whether there is an on event of a panel switch on the operation panel 1 (step S2), and if it is determined that there is an on event of a panel switch, panel processing corresponding to the switch is performed. (Step S3), and then returns to Step S2. In this panel processing, when another tone is selected by operating a tone selection switch on the operation panel 1, for example, tone data setting processing etc. necessary for emitting the selected tone are performed. . The same applies to other switches 11).

On the other hand, if it is determined in step S2 that there is no on-event in Banelsui Sochi, then it is checked whether or not there has been a key depression on the keyboard 2 (step S4). When it is determined that a key has been pressed, a key press processing subroutine is called, and a sound generation process corresponding to the pressed key is performed (step S5), after which the process returns to step S2. In this key press processing, touch data conversion processing, which is related to the features of the present invention, is performed. Details of these will be described later.

On the other hand, if it is determined in step S4 that no key has been pressed, it is checked whether or not there has been a key release (step S6).
). Then, when it is determined that the key has been released, a key release process is performed (step S7).

This key release process is a mute process that occurs when the player releases a key. After this key release process, the process returns to step S2.

On the other hand, if it is determined in step S6 that no key has been released, the process returns to step S2 and the same process is repeated again. From then on, it is determined whether the panel switch was operated (step S2), whether a key was pressed (step S4), and whether the Mfs
The process loops while checking whether there was a problem (step S6).

Next, key press processing will be explained. This key pressing process is performed according to the procedure shown in FIG. First, an assignment process is performed (step 5IO). This assignment process is a process of allocating a sound generation channel for a musical tone signal to be generated from now on.

Next, new touch data calculation processing is performed (step 511). This new touch data calculation process includes touch data average value calculation process (step 5), as shown in FIG.
20) and address calculation processing (step 521) (details will be described later), and when this new touch data calculation processing is completed, step S12 in FIG.
The process returns to step 512 and performs a sound generation process (step 512). In this sound generation process, sound is produced at a volume suitable for the performer using the touch data converted based on the new touch data.

The touch data average value calculation process shown in FIG. 5 will be described with reference to the flowchart in FIG. 6.

Generally, 01 touch data (t,) (n=12.3
．． 4. ..., C1), and their average value is t AV
Then, the average value t AV is obtained by the following formula.

tAV-Σt,/C1-(1) Now, as an example, it is assumed that the number of samples for calculating the average value tAv is 256, and the average value tAV is calculated from this.

First, the CPU 5 receives touch data t output from the touch sensor 3. is received via the input/output interface 4,
Temporary register T provided in working memory 7
MP (not shown) (step 531).

Then, it is checked whether the variable i (which is initially set to zero when the power is turned on) is smaller than "r256", that is, whether the number of key presses has reached 256 (step 532).
If it is smaller than "r256", the contents of the temporary register TMP are stored in address i (hereinafter referred to as BUF (i)) of the buffer BUF provided in the working memory 7 (step 833).

Next, increment the variable i (step 534),
Let C2 be the average value tAV (step 535). Here, C2 is the average value of the touch data of the function f(t,) stored in the touch curve memory 8. That is,
The series of processes from Steps 331 to S35 described above is performed when the number of samples of touch data is less than r256'', the function f(t, ,
) average value C2 is used in the following processing as the average value t AV
That is. This average value C2 is a constant that is uniquely determined because the contents of the touch curve memory 8 are fixed.

On the other hand, if it is determined in step S32 that the variable i is equal to or greater than r256J, the variable j is initialized to zero (step 536), and the average value tAv (storage area) is initialized to zero (step 537). ).Then, the contents of address j of the above buffer BUF (hereinafter referred to as BUF Cj:]
) is added to the storage area for the average value t AV to calculate the cumulative value t AV (step 538). Next, check whether the variable j has become r255J, that is, the buffer BUF
It is checked whether the addition of all the contents of has been completed (step 839). r255], the variable j is incremented (step 540), and the process returns to step S38.

Then, steps 338 to 40 are repeatedly executed until the variable j becomes [255], and when it is determined that it has become r255J, the contents accumulated in the storage area of the average value tAV are divided by r256J. The new mean value t
Find AV. The average value t AV calculated here reflects the player's key touches. Thereafter, the sound generation process will be performed while correcting the touch curve in consideration of this average value j AV.

Next, the address calculation process shown in FIG. 5 will be explained with reference to the flowchart shown in FIG.

In this address calculation process, the readout position of the touch curve f (t,) already stored in the touch curve memory 8,
In other words, a new touch curve f'(tn) is obtained by changing the address and reading the data.

For example, a new touch curve can be obtained as follows using the average value obtained using the above equation (1) and tAV.

C0〈t,≦t AV, f' (ta) = f2' (t,,) -f + (C2/ t Av) ・t n) - (2) ■
If t, Av≦t h < a, then f'(tn)=fs'(t,) -f (((a C2)/(a t Av))・
70]...(3) Here, a is t. is the maximum possible value plus "1", and C2 is the constant described above.

As shown in FIG. 1(b), the above equation (2) is expressed as shown in FIG.
) of f (t,,): O<tn≦t This represents compressing and expanding AV by 2 times tAv/C in the horizontal axis direction.

As shown in FIG. 1(b), the above equation (3) is expressed as shown in FIG.
) of f (t,): 0<t, ≦t AV is compressed and expanded by (a tAv) / (a C2) times in the horizontal axis direction.

Specifically, as shown in FIG. 7, first, the contents of the temporary register TMP, that is, the touch data output by the touch sensor 3, are substituted into a variable called ADR (step 550). Next, it is determined whether or not this variable ADR is less than or equal to the average value t AV calculated in the touch data average value calculation process (step 551). When it is determined that it is below the average value tAV, a new variable ADR' is calculated using the following formula, and this is stored in the touch curve memory 8.
The data is read from the memory 8 as the address of , and is used as a touch data conversion output (step 552).

ADR' = l (C2/1Av)・ADRl −=
(4) Here, "1" is an absolute value symbol.

On the other hand, if it is determined that the variable ADR is larger than the average value tAV, a new variable ADR' is calculated using the following formula,
Using this as the address of the touch curve memory 8, read the data from the memory 8 and use it as a touch data conversion output (
step 553).

ADR'-C2+ 1 +(C2-tAv)/(C3-
tAv))・ADRI...(5) Here, C3 is the maximum touch +1, and if the address of the touch data table is O1l~FF, then 1008
It is. Note that the subscript "H" indicates a hexadecimal number.

FIG. 8 shows how touch data is converted by the above processing.

When certain touch data t1 is input, the following equation holds true, where f'(t) is an expression expressing the relationship between it and the conversion output, and f(t) is the content of the touch curve memory 8.

f'fADR(tl)l=f(ADR'(tl))...
(6) Therefore, there is no need to store the new touch curve table f'(t).

As described above, the first function f as shown in FIG. 1(a)
(t,) is stored in the touch curve memory 8, a plurality of touch data 1 from the touch sensor 3 corresponding to the player's key presses are sequentially accumulated and stored, and a predetermined number of touch data are stored. Once stored, calculate the average value tAV as a statistical value, and use the calculated average value tA
The input touch data tn is stored in the touch curve memory 8 to form a second function f'(t,) corresponding to V.
Convert to the address given to . Here, the second function f'
(t,) is, for example, touch data t, as shown in FIG. 1(b). is less than the average value tAV, the function fz'(t-
), when the touch data tn is larger than the average value tAV, the function fi'(t-) has the characteristic of expanding the touch curve. Then, using this converted address, the touch curve memory 8
The data read from the touch panel is used as touch data to generate musical sounds. This gives us the second function f'(t,)
The sound will be emitted according to the new touch curve shown by , making it possible to emit sound that matches the key touch characteristics of the performer.

In the above embodiment, the touch curve is changed by inputting 256 pieces of touch data immediately after the power is turned on. Not limited to the above.

For example, the average value t IAV, 2 of the 1st to 256th
57th to 512th average value t 2AV,...'
256X (n-1) + IJ to "256 x n"th average value j nAV is used to find the average of tl to tn, and this is the output of the touch data average value calculation routine shown in Figure 6. The number of people who can also do this is 256X (n
It is the same as taking +1> Sunnor.

[Effects of the Invention] As detailed above, according to the present invention, a touch curve that matches the key touch characteristics of a performer can be created without knowledge of touch curves or without manual editing work. It is possible to provide an electronic musical instrument that can be easily obtained and can be played by touching the keys based on the player's image.

Is it Fuide?

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining the present invention in detail, FIG. 2 is a block diagram showing the configuration of the electronic musical instrument of the present invention, FIGS. 3 to 7 are flowcharts for explaining the present invention in detail, FIG. 8 is a diagram for explaining the operation of the embodiment of the present invention. 1...Operation panel, 2...Keyboard, 3...Touch sensor, 4...I/O interface, 5...CPU (3
11 means, conversion means, reading means), 6... program memory, 7... working memory, 8... touch curve memory (storage means), 9. sound source section (musical sound generation means)
, 10... DACll... amplifier, 12... sound system. (a) (b) Figure 1 procedural amendment dated July 24, 1990

Claims (1)

[Scope of Claims] A storage means for storing data constituting the first function, a touch sensor for detecting the strength or speed of key depression, and statistical processing of the touch data detected by the touch sensor to obtain statistics. a calculation means for calculating a value; and a calculation means for reading out the touch data detected by the touch sensor according to the statistical value calculated by the calculation means, the contents of the storage means as data constituting a second function. a converting means for converting into an address; a reading means for supplying the address converted by the converting means to the storage means and reading data constituting the second function; An electronic musical instrument characterized by comprising a musical sound generating means for generating musical sounds as data.