JPH0736109B2 - Touch response device - Google Patents

Description

The present invention relates to a touch response device which variably controls musical tone characteristics such as volume and tone color in response to a key depression operation.

[Background of the Invention]

Conventionally, as a touch response device, the key pressing speed is detected, the key pressing speed data is corrected by the touch response memory, and then the tone envelope is modified to change the volume and timbre.

However, in such a device, since the touch response memory is fixed, a beginner with a weak key-pressing force cannot produce a strong and loud sound, and the individual player's response preference is not satisfied. However, there was a problem that it was not possible to obtain a response according to the timbre or musical style.

Therefore, as shown in FIG. 9, in order to eliminate the deviation of the touch data between the detection range A of a person having a weak key-depressing force and the detection range B of a person having a strong key-depressing force, the detection range B is almost the same as A. It was thought that the shift could be corrected by forcibly shifting to the range.

However, in such a case, since the variation range with respect to the key pressing force of the touch data, that is, the sensitivity, is constant, the sensitivity is reduced to reduce the variation range for beginners with varying strengths. There was a problem that it was difficult to obtain the desired sensitivity for myself. Therefore, conventionally, it has been considered that the sensitivity data can be set so that the sensitivity of the touch response can be arbitrarily changed, and the touch data is changed by multiplying the sensitivity data and the touch data. According to this method, the touch response is certainly suitable for the performer. It will be the easiest to play. However, in this method, if the sensitivity data is inadvertently set to zero, that is, a value that does not reflect touch at all,
There was a risk that the touch response would be completely zero and no performance sound would be produced. Normally, in the case where the touch response is not given, it is configured to output the reference data of a constant value regardless of the size of the touch. When the sensitivity data becomes zero, the touch data of this constant value is output. It is natural to output. Moreover, it is desirable that the reference data of this constant value be variable according to the preference of the performer, but this cannot be done by the conventional device.

[Object of the Invention]

Therefore, it is an object of the present invention to output a value desired by a performer without performing an abnormal touch response operation when the sensitivity data is set to a value that does not reflect the sensitivity data at all.

[Main points of the invention]

To achieve this object, touch data generation means for detecting a playing operation state to generate touch data, and difference value detection for detecting a difference value between the touch data from the touch data generation means and a predetermined reference value. Means, sensitivity data setting means for setting sensitivity data for indicating a degree of change for changing the touch data from the touch data generating means, and the difference value detection based on the sensitivity data set by the sensitivity data setting means. Changing means for changing the difference value from the means, adding means for adding the predetermined reference value to the difference value changed by the changing means, and a characteristic of the musical tone based on the value added by the adding means And characteristic determining means for determining.

[Configuration of the first embodiment]

 An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an overall circuit diagram of the touch response device. In FIG. 1, reference numeral 1 denotes a key switch circuit, and this key switch circuit 1 is provided for each key of a keyboard (not shown). It is composed of a plurality of sets of a first switch A ₁₀ and a second switch A ₂₀ as shown in FIG. These switches A ₁₀ , A
Reference numeral ₂₀ denotes a switch that is turned on at a timing shifted according to a key press, and a scan signal from the key assigner 2 is given to detect a key press and a key release. When the key assigner 2 detects that a key is pressed, the key-on signal A ₁ is sent to the touch data generation circuit 3 at the timing of turning on the first switch A _10.
To give give a key-on signal A ₂ Tatsuchideta generating circuit 3, the envelope generator circuit 4 and the waveform generating circuit 5 at the timing of on of the second switch A _20, the second switch A
_The key-off signal D ₁ is given to the envelope generating circuit 4 at the timing of turning off ₂₀ , and the key code KC corresponding to the depressed key is given to the waveform generating circuit 5.

The touch data generation circuit 3 is based on the key-on signals A ₁ and A ₂ and is a signal shown in FIG. 3 which indicates a shift in the ON timing between the first switch A ₁₀ and the second switch A ₂₀ . Produces this signal Of the pulse width is generated to generate touch data TD, and the touch data TD is given to the envelope generation circuit 4. When the key pressing force is large, the on timings of the first switch A ₁₀ and the second switch A ₀ are close, and the touch data TD becomes small. Based on the touch data TD, the envelope generation circuit 4 receives the key-on signal A ₂ to start the envelope from the attack, receives the key-off signal D ₁ to start the release of the envelope, and when the envelope ends, sends the end signal EF to the key assigner 2 Give to. End signal for Key Assigner 2
When EF is received, it waits so that the next tone can be assigned.

The waveform generation circuit 5 generates a waveform having a frequency corresponding to the key code KC, and this waveform is multiplied by the envelope data E from the envelope circuit 4 to generate the musical tone waveform data W.
Is given to the sound system 6, D / A (digital / analog) conversion and amplification are performed, and a musical sound is emitted. Here, the key-on signal A ₂ is used to initialize the phase counter so that the generated waveform always starts from zero phase.

FIG. 4 shows a detailed circuit diagram of the envelope generating circuit 4. In the figure, 41 is a data changing circuit 41.
Reference numeral 41 is for changing the touch data TD from the touch data generating circuit 3 based on the sensitivity data, and giving the changed touch data Td to the divider 43, as will be described later. Reference numeral 44 in the figure denotes an envelope status circuit, which is based on the above-mentioned key-on signal A ₂ , key-off signal D ₁ , and match signal O, and outputs envelope waveforms of silence, attack, decay, sustain, and release. The envelope status ST indicating each part is given to the envelope rate memory 40 and the envelope level memory 42.

The envelope level memory 42 stores level values at each point such as attack, sustain, and silence of the envelope waveform, and the level value at each point is divided as envelope level data EL according to the content of the given envelope status ST. Given to container 43. In the divider 43, the envelope level data El is divided by the modified touch data Td from the data modification circuit 41, and the resulting data is supplied to the comparison circuit 46 and the selection circuit 47 as modified envelope level data El. In this case, change touch data Td
Since the larger the key pressing force, the smaller the value, the divided envelope level data El becomes a value proportional to the key pressing force.

On the other hand, the envelope rate memory 40 stores rate (gradient) values such as attack, decay, and release of the envelope waveform, and the rate value of each part is envelope rate data depending on the contents of the given envelope status ST. It is given to the envelope counter 45 as ER. The sign bit data S ₁ indicating the rising (0) and the falling (1) of the slope of the envelope rate data ER is also given to the comparison circuit 46.

The envelope counter 45 adds or subtracts the envelope rate data ER to the envelope data E fed back from the selection circuit 47 during storage to generate an envelope count value E ₀ ,
It is given to the comparison circuit 46 and the selection circuit 47. The envelope counter 45 starts the count operation when the key-on signal A ₂ is given, and switches the count content to addition or subtraction based on the value of the code bit data S ₁ .

Comparator circuit 46 compares the changed envelope level data El from the envelope count E ₀ and the divider 43, Atatsuku envelope count E ₀ is consistent with the sequential count has been changed envelope level data El, sustain, silence When it reaches each point of, the coincidence signal O is given to the envelope status circuit 44 and the selection circuit 47.

The selection circuit 47 normally selects and outputs the envelope count value E ₀ from the envelope counter 45 as envelope data E, and when the coincidence signal O is given from the comparison circuit 46, the modified envelope level data El from the divider 43 is changed to the envelope data. It is output as E, and the level at any point of attack, sustain, and silence is held as envelope data.

The envelope status circuit 44 has a key-on signal A ₂
Is given, attack is given when the match signal O is given, sustain is given when the match signal O is given, release is given when the key-off signal D ₁ is given, and no sound is given when the match signal O is given next. The envelope status ST is output, and the envelope end signal EF shown in FIG. 3 is given to the key assigner 2 together with the output of the silent envelope status ST.

FIG. 5 shows a detailed circuit diagram of the data change circuit 41. This circuit 41 has the touch data TD as shown in FIG.
On the basis of the sensitivity data SD (O ≦ SD ≦ 1) representing the degree of change, using the reference touch data FD with a zero change amount as reference, and making the change touch data Td, Td = FD + SD × (TD-FD) = FD + Sign [TD-FD] x SD x | TD-FD |. Here, Sign [TD-FD] indicates that the value of (TD-FD) is + or −, takes a value of 1 or −1, and the reference data FD takes a value of mf (mesoforte) in the present embodiment. Data SD
Takes a value between 0 and 1, and the larger the value, the larger the inclination in FIG. 7, and the greater the variation in the touch response. The touch data TD is "00 ... 01" to "11 ... 11".
The reference data takes the value of the central value "10 ... 00".

In the figure, reference numeral 422 is a two's complement circuit, and the lower data other than the most significant bit MSB of the touch data TD is the data of the two's complement obtained by +1 by exchanging "1" and "0" in this two's complement circuit 422. Is converted to. 2's complement is the reference data
This is because the FD is “10 ... 00” and the two's complement is the difference | TD−FD | between the reference data FD and the touch data TD. In this case, if the touch data TD is larger than the reference data FD,
The value except the highest bit MSB “1” of the touch data TD is different |
Since this is TD-FD |, this highest-order bit MSB is an inverter
Inverted at 420 and given as a drive signal to the 2's complement circuit 422, complement conversion is performed only when the most significant bit MSB is "0" and the touch data TD is smaller than the reference data FD. When it is larger, the lower data is output as it is. To be done. The data of the difference | TD−FD | calculated in this way is given to the multiplier 423.

Sensitivity data SD, which is arbitrarily selected and set in advance from 0 to 1, is given to the multiplier 423 from the sensitivity data setting circuit 424, and SD × | TD−FD | is multiplied to obtain another 2's complement number. Circuit 42
Given to 5.

Similarly, the 2's complement circuit 425 also performs conversion to the 2's complement, and the difference FD-SD × | TD-FD | from the reference data FD is obtained. Also in this case, as shown in FIG. 7, when the touch data TD is smaller than the reference data FD, SD ×
It is sufficient to subtract | TD−FD | from FD.
Must be added to the top bit MSB above.
Is given as a drive signal to the two's complement circuit 425 after being inverted by the inverter 420, and when TD is larger than FD, SD × | TD−FD | is output as it is.

When the touch data TD is larger than the reference data FD, the most significant bit MSB is "1", and this bit data is inverted by the above inverter 420 and then reinverted by another inverter 421 to be returned to "1". It is output as the highest bit of the modified touch data Td. Since this bit data is equal to the reference data FD, FD + SD × | TD−FD | is obtained.

In this way, the change data Td is obtained for both TD <FD and TD ≧ FD, and given to the divider 43.

[Operation of the first embodiment]

 Next, the operation of this embodiment will be described.

In order to obtain the touch response effect, the sensitivity data SD may be set to a desired strength within the range of 0 to 1, for example, "1" which is the maximum, and the keyboard (not shown) may be depressed. It is assumed that the touch data generation circuit 3 outputs the touch data TD, for example, "0101101 (45)", which has a large key pressing force and is smaller than the mf (mesoforte) data, which is the reference data FD, for example, "1000000".

Then, the highest bit "0" of this touch data "0101101" is the data change circuit 41 in the envelope generation circuit 4.
Inverted to "1" by the inverter 420 of the 2's complement circuit 4
It is given to 22 and 425 as a drive signal. As a result, the lower order data "101101" of the touch data is converted into the complement "010011" by the 2's complement circuit 422, and the difference | TD-FD | of the touch data TD "0101101" with respect to the reference data FD "1000000" is obtained.

This difference “010011” is multiplied by the sensitivity data SD “1”, and the result data SD × | TD-FD | “010011” is the two's complement circuit 42.
It is converted to the complement “101101” by 5 and the reference data FD “1
Result data for “000000” SD × | TD−FD | “01001
The difference FD−SD × | TD−FD | of 1 ”is obtained, and this is changed together with the output“ 0 ”from the inverter 421.
"1101" is given to the divider 43, and the envelope level data El corresponding thereto is generated, and a musical sound is emitted at a volume level higher than the mf.

In addition, the touch data TD is a value larger than the reference data FD “1000000” of mf (mezoforte), for example, “1011010 (90)”.
Since the most significant bit MSB is "1", the two's complement circuits 422 and 425 are not driven and the lower data "011010" is multiplied by the sensitivity data SD "1" to change data Td "101101".
"0" is output.

Thus, when the sensitivity data SD is "1", "0101101 (4
5) ”to“ 1011010 (90) ”touch data TD
Is output as the modified touch data Td with the same value.

Next, in order to reduce variations in touch response due to reasons such as beginners with varying strengths playing, sensitivity data SD may be reduced, for example, "0.5".
When set to, the above “0101101 (45)” to “1011010
The touch data TD in the range of "(90)" is "0110111 (5
5) ”to“ 1001101 (77) ”range reduced.

[Effects of the first embodiment]

In this way, the fluctuation range of the touch response can be changed arbitrarily by changing the sensitivity data.
The desired sensitivity for the performer can be obtained. Further, since the change in the touch response is centered on the reference data FD in which the change amount is zero as shown in FIG. 7, the sensitivity data
When SD is set to "0" and the fluctuation range is set to zero, the output volume is all mf (mesoforte). If there is no reference data FD and the graph is changed around the origin in the graph of Fig. 7, the sensitivity data SD When "0" is set to "0", the changed touch data Td becomes "0", which eliminates the inconvenience that the sound emission volume becomes infinite.

[Second embodiment]

FIG. 6 shows the data change circuit 41 of the second embodiment.
In this embodiment, the reference data FD can be set arbitrarily.

In the figure, reference numeral 414 is a reference data setting circuit, which is composed of seven switches. One end of each switch is connected to the constant voltage source Vcc, and the other end is grounded via a resistor. ", OFF, each data of" 0 "is output, and this is given to the subtractor 410 as the reference data FD.

The touch data TD from the touch data generation circuit 3 is also applied to the subtractor 410, and TD-FD is subtracted to obtain 2
When the subtraction value TD-FD is negative, the code data S ₂ “1” indicating this is given to the 2's complement circuit 411 as a drive signal.

In the 2's complement circuit 411, only when the subtraction value TD-FD is negative, it is converted into a complement, and eventually the absolute value | TD-FD | is output and given to the multiplier 412. The sensitivity data SD exactly the same as that in the first embodiment is given to the multiplier 412 from the sensitivity data setting circuit 424, multiplication by SD × | TD−FD | is performed, and the result is given to the adder / subtractor 413.

The reference data FD is given to the adder / subtractor 413, and the code data S ₂ is added / subtracted by a command signal (1:-, 0: +).
When the code data S ₂ is “1” and TD <FD, FD−SD × | TD−FD | is subtracted, and when the code data S ₂ is “0” and TD ≧ FD , FD + SD × | TD−FD | are added, and these data are output as the modified touch data Td.

The other components are the same as those of the first embodiment. (Effect of the second embodiment) In this embodiment, the reference data FD can be changed by switching on and off of each switch of the reference data setting circuit 414. Therefore, if, for example, the sensitivity data SD is brought close to 0 and the reference data FD is changed variously, the touch response can be made a substantially constant value according to the reference data FD, but the sensitivity data SD is made very large and the reference is obtained. Data FD
By approaching to 0, it is possible to achieve a wide variety of touch responses, such as a wide range of performances from a strong touch response to a weak touch response in the range of weak key depression.

A memory such as a ROM may be used as the reference data setting circuit 414 of the second embodiment, and the reference data FD may be set according to the tone color selection, and any setting method may be used. Further, the sensitivity data SD may be set to 1 or more instead of 0 to 1, so that the variation of the touch data TD may be further expanded, and the setting method may be any format. Further, the touch data TD depends on the time difference between the rising timings of the _two key-on signals A ₁ and A ₂ , but the present invention is not limited to this, and the time difference data may be converted in a desired memory. Furthermore, instead of allocating one envelope for each sound, a plurality of envelopes may be allocated to partial sounds such as sine wave synthesis by using different sensitivity data to obtain a more natural touch response. .

〔The invention's effect〕

As described above, in the present invention, the sensitivity of the touch response can be arbitrarily changed.Therefore, for beginners of variations in strength and weakness, the sensitivity can be reduced to reduce the variation of the touch response to a small extent, or conversely, to a slight touch response. You can greatly magnify the difference and get the touch response that the performer is most comfortable playing.
As shown in FIG. 7 and FIG. 8, the variation of the sensitivity is centered on the constant reference data. Therefore, even if the sensitivity becomes zero, the touch response data is the reference data set from the outside. Since the corresponding constant value is held, there is an effect that the size of the touch response does not become infinite or zero even if the sensitivity is zero.

[Brief description of drawings]

FIG. 1 is an overall circuit diagram of the touch response device, FIG. 2 is a circuit diagram of a switch provided in one key of the key switch circuit 1 of FIG. 1, and FIG. 3 shows signal waveforms of respective parts of FIG. 4 and 5 are circuit diagrams of the envelope generating circuit 4 of FIG. 1, FIG. 5 is a circuit diagram of the data changing circuit 41 of FIG. 4, and FIG. 6 is a circuit diagram of the data changing circuit 41 of another embodiment. , 7th
FIGS. 8 and 9 are views showing a state in which the touch data TD is changed to the touch data Td by the data change circuit 41 shown in FIGS. 5 and 6, and FIG. 9 is a view showing a state of the conventional touch data change. Is. 3 ... Touch data generation circuit, 4 ... Envelope generation circuit, 5 ... Waveform generation circuit, 6 ... Sound system,
41 ... Data change circuit, 43 ... Divider, 44 ... Envelope status circuit, 410 ... Subtractor, 411,422,425 ...
... 2's complement circuit, 413 ... adder / subtractor, 414 ... reference data setting circuit, 415, 424 ... sensitivity data setting circuit.

Claims (1)

[Claims] 1. A touch data generating means for detecting a playing operation state to generate touch data, and a difference value detecting means for detecting a difference value between the touch data from the touch data generating means and a predetermined reference value. Sensitivity data setting means for setting sensitivity data for indicating a degree of change for changing the touch data from the touch data generating means, and the difference value detecting means based on the sensitivity data set by the sensitivity data setting means. Changing means for changing the difference value, adding means for adding the predetermined reference value to the difference value changed by the changing means, and the characteristic of the musical sound is determined based on the value added by the adding means. A touch response device comprising: a characteristic determining unit;