JPS61188593A - Touch response unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Summary of the Invention] The present invention is capable of controlling musical sound characteristics such as pitch, tone quality, tonality, timbre, and volume in accordance with the speed or intensity of key depression. Regarding the Chilesbon equipment.

[Conventional technology]

Conventionally, as a device for variable control of pitch, there is a device that obtains a glide effect by changing layer number information that determines pitch at predetermined time intervals, for example, to converge to a -interval wave number.

This uses the frequency value of the pitch corresponding to the operating key as fundamental frequency information, and adds or subtracts corrected frequency information that changes and converges at a predetermined time interval to this fundamental frequency information to obtain changed frequency information. I try to make subtle changes in pitch.

[Problems with conventional technology]

However, with such a device, no matter how you change the playing method, the corrected frequency information is always a constant value.
However, only the glide effect with the same change pattern was obtained.

Therefore, there is a problem in that the expressive power is poor compared to natural musical tones.

[Purpose of the invention]

Therefore, an object of the present invention is to sequentially change the pitch, tone quality, etc. of each musical tone by changing the playing method, such as changing the speed or intensity of key pressing operations, and thereby obtain a musical tone that is closer to a natural musical tone.

[Key points of the invention]

In order to achieve this object, the present invention is arranged so that the musical tone is changed according to the envelope waveform signal as shown in No. 7@, and the level (height) of each point of this envelope waveform signal or the The key point is that by changing the rate (inclination) as needed according to the magnitude of the key touch force, the width or speed of musical tone change can be varied according to the magnitude of the key touch force.

[Configuration of the first embodiment]

A first 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 the figure, 1 is a key switch circuit. It consists of a plurality of sets of a first switch AIQ and a second switch A2G as shown in FIG. These switches A10mA20 are switches that are turned on at different timings in response to key presses, and are supplied with scanning signals from the key assigner 2 to detect key presses and key releases.

In the key assigner 2, it is detected that the key has been pressed I11, and the key-on signal M1 is given to the touch data generation circuit 3 at the turning-on timing of the first switch A10, and at the turning-on timing of the second switch A2G. The key-on signal A2 is applied to the touch data generation circuit 6, the envelope generation circuit 4, the frequency information generation circuit 5, and the waveform generation circuit 6, and the key-off signal D1 is applied to the envelope generation circuit 4 at the timing when the second switch A20 is turned off. Furthermore, a service code KO corresponding to the pressed key is provided to the waveform generation circuit 5. .

In the touch data generation circuit 6, the key-on signal A1g
Based on '2, the first switch AlO4! : A signal At@A2 as shown in FIG. 3 indicating the difference in on timing with the second switch A20 is generated, and this signal h1.5
The pulse width of is counted and touch data TD is created, and the envelope generation circuit 4 and the frequency information generation circuit 5
given to.

When the key touch force is large, the touch data TD becomes a small value because the on timings of the first switch A1G and the second switch A20 become close to each other.

In the envelope generation circuit 4, envelope data of attack, first decay, and second decay are created based on the touch data TD using the key-on signal A2 and the key-off signal D1, and are provided to the waveform generation circuit 6. When the envelope is completed, an end signal xy is given to the key assigner 2, and the key assigner 2 waits so that the next musical tone can be assigned.

, 1! In the IT wave number information generation circuit 5, the key-on signal A2
is given, key food KO from key 7 saina 2
On the other hand, the touch data T from the touch data generation circuit 6
Based on D, a change is made in accordance with the key touch force, and this is given to the waveform generation circuit 6 as a frequency correction signal.

The waveform generating circuit 6 generates a musical sound waveform with a frequency corresponding to the key food xO, multiplies this musical waveform by the envelope data from the envelope generating circuit 4, and provides musical waveform data W to the sound system 7. D/
A (digital/analog) conversion and amplification are performed, and musical tones are emitted. Here, the key-on signal A2 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 frequency information generation circuit 5. In the figure, 51 is a data change circuit. If is mf (mezzo forte) then r
If it is more than lJ, mf, it is less than rlJ, and if less than mf, it is more than "1", and this is the changed touch data TD.
1 to the level data changing circuit 56.

In addition, 54 in the figure is an envelope status circuit.
In the envelope stator 1 circuit 54, an envelope status 8T indicating each part of the set, attack, first decay, and second decay envelope waveforms is created based on the above-mentioned key-on signal A2 and coincidence signal 0.
The envelope level memory 52 provided to the envelope plate memory 50 and the envelope pre and bell memories 52 stores the level (height) of each point such as the settle attack and decay at the strength of the mf (mezzo forte) of the envelope wave f. ) is memorized and the level value of each point is determined according to the contents of the envelope status 8T given by 1. :L, r is given to the level data changing circuit 56.

In the level data changing circuit 5M, the envelope level data ETJ is changed to the changed envelope level data El by the changed touch data TD1 from the data changing circuit 51.
It is converted into data that reflects the key touch force,
The signal is then applied to a comparison circuit 56 and a selection circuit 57.

On the other hand, the envelope plate memory 50r stores the rate (slope) values of each part of the envelope waveform, including the 7 tack, the first decay, and the second decay. The value 0 is given to the envelope counter 55 as the envelope plate data ER. Sign bit data S1 indicating whether the envelope plate data is simply rising "O" or falling "1" is also given to the comparison circuit 56 .

In the envelope counter 55, the envelope plate data IcR is added to or subtracted from the envelope data K fed back from the selection circuit 57, and an envelope count value 1to is created and provided to the comparison circuit 56 and the selection circuit 57. The envelope counter 55 starts a counting operation when the key-on signal A2 is applied, and switches the count to addition or subtraction based on the value of the sign bit data S1. ,.

In the comparison circuit 56, the envelope count value ICQ and the changed envelope level data Xt are compared at any time, and the envelope count value 11iQ is sequentially counted as the changed envelope level data *II! When the set point, attack point, decay point, and final convergence point are reached, a match signal O is given to the envelope status circuit 54 and the selection circuit 57.

The selection circuit 57 normally selects and outputs the envelope count value 'yB of)i envelope data E from the envelope counter 55, but the coincidence signal O
is given, the modified envelope level data from the level data modification circuit 56 is selected and output as envelope data E, and the level at any point of set, attack, decay, or final convergence is envelope data X.
is retained as. This envelope data E is modified envelope level data x that reflects the above-mentioned key touch force!
This envelope data I is given to the adder/subtractor 58, which reflects the key touch force.

The adder/subtractor 58 converts the key food KO from the key assigner 2 into envelope data E if the envelope data 1 from the selection circuit 57 is larger than the reference data POrlO00000(64)J and the most significant bit is "1".
is added, and conversely, if it is small and the most significant bit is "0", the envelope data K is subtracted, the key food KO is changed so that it changes as the sound emission time elapses, and this is output as the changed key food ko, and the exponent memory 59 The signal is given to the waveform generating circuit 6, converted into a frequency signal, and then given to the waveform generation circuit 6. This change key code k.

The frequency information 1 which is further converted is changed according to the envelope data 1 which reflects the key touch force, so that it reflects the 1s touch force.

FIG. 5 shows a detailed circuit diagram of the level data changing circuit 53. In the figure, 512 is a two's complement circuit. The complement circuit 512 outputs “1” and “
The two's complement data, which is converted to two's complement data by exchanging 0'' and +1, is obtained from the reference data Parlooooo shown in FIG. 7, which is the final convergence point of the envelope.
o (envelope level day against April #K
rJ) This is to obtain the difference 1m1-Po1. The most significant bit MSB of the envelope level data KL is inverted by an inverter 510 and given to a two's complement circuit 512 as a drive signal, and the envelope level data ICL
is larger than the reference data po and the most significant bit MsB is rL
When no drive signal is applied at J, the complement conversion is not performed and the lower data of the envelope level data EL is output as is. The reason why the envelope level data RfL is output as is is that the reference data Parto
This is because if it is larger than (64)J, the difference 1m:c,-pol between both data is equal to the lower data excluding the upper fi 9) MSB'' of the envelope level data 1cIJ.

The difference data bL-PQI calculated in this way becomes data indicating the relative height with respect to the reference data PQ, which is the final convergence point of the envelope, and is provided to the divider 516.

The divider 516 divides the difference data IKL-PQI by the modified touch data Td from the data modification circuit 51,
The resulting data is provided to two's complement circuit 514. In this case, the changed touch data T(l takes a smaller value as the key touch force increases, so the data as a result of this division is changed in proportion to the key touch force.

The two's complement circuit 514 similarly performs conversion to a two's complement, and the reference data portoooo.

(64) The above division result data is subtracted from J. The inverted output of MffB from the inverter 510 is applied as a drive signal to the two's complement circuit 514, so that the envelope level data KL is larger than the reference data Po and the MSB is "1". '', if no drive signal is given, no complement conversion is performed and the division result data is output as is.

Then, the inverted output of the most significant bit (MSB) of the envelope level data IIL from the inverter 510 is re-inverted by the inverter 511 and returned to its original value. The output becomes I''tJ, which is the two's complement circuit 51 mentioned above.
It is output as the most significant bit data of the data from 4. Since this most significant bit data is equal to the reference data PO, the envelope level data EL is & quasi 7'
- If the data is larger than PQr1000000 (64)J, the two's complement circuit 514 uses the reference data p□rL0.
00000 (64) The above division result data will be added to J0. Thus, the difference data 1m L-P 01 indicating the relative height of the envelope waveform with respect to the reference data PO will be changed to the touch data Tl. The division result data enlarged or reduced according to the size is added to or subtracted from the reference data Po, and converted into data indicating the absolute height of the envelope waveform similar to the original envelope level data EL, which is then converted into data indicating the absolute height of the envelope waveform, which is similar to the original envelope level data EL. This will be output as modified envelope level data Ej.

In the end, based on the envelope level data mLGt change #tsuchi data TcL, the level value is changed to the reference data Po.
will be changed in proportion to the key touch force.

[Part 1 - Operation of real power example]

Next, the operation of this embodiment will be described.

Now, assuming that a key on the keyboard (not shown) is operated with the strength of at, the changed touch data TDI becomes rlJ,
Since the divider 516 of the level data change circuit 56 performs division by "1", the envelope level data HXs from the 1-envelope level memory 52 is output without being changed. Therefore, the envelope data E is output at the level of the waveform shown by the dotted line in FIG. 8, and addition and subtraction processing of the key food KO corresponding to the operated key from the key assigner 2 is performed along this envelope waveform.

That is, near the first set point of the envelope,
Since the envelope data E is smaller than the reference data PQ and the most significant bit is "0", the envelope data E is subtracted from the key food KO, but if the envelope data 41 exceeds the reference data PQ during the attack, the opposite occurs. Addition is performed and progresses through the first decay and second decay, and when the envelope data E settles to the reference data PQ, addition and subtraction are no longer performed.◎As a result, at the beginning of the attack, a sound lower than the pitch of the operating key is output. From the latter half of the attack, a high note is output during the second decay *5, and eventually settles down to the front high of the operating key.

Next, operate the same key more forcefully than mf, and press switch A10.
．． Assuming that the on-timing of A20 approaches and the changed touch data TD1 becomes ro, 8J, the envelope level data ]ljL is smaller than rtJ, rO, 8.
Since it is divided by J, the envelope data becomes larger as shown in the # line in Figure 8, and the width of the change in pitch becomes larger and the duration of the change becomes longer.

Also, conversely, operate the same key more gently than MF, and switch A.
If the on timing of 10#A20 is separated and the changed touch data TD1 becomes rl, 33J, then the envelope level data zL is larger than rlJ, rL, 3.
Since it is divided by 3J, the envelope data E is reduced as shown by the solid line in FIG. 8, and the width of the change in pitch becomes smaller and the duration of the change becomes shorter.

In this way, the range of change in pitch of a musical tone varies depending on the magnitude of the key touch force.

[Effects of the first embodiment]

In this example, not only the variation range but also the variation duration changes depending on the key touch force, so the difference in key touch force is more clearly expressed, and the pitch variation range changes depending on the key touch force. By doing this, it is possible to include pitch changes in the content of the touch response, making the musical tone changes rich in variety. Moreover, the envelope data E can change depending on whether it is larger or smaller than the reference data p (H). Since the contents are added or subtracted, there are advantages such as being able to change the pitch up and down around the pitch of the operating key.

[Second example]

FIG. 6 shows the frequency emotion generating circuit 5 of the second embodiment. In this embodiment, not only the envelope level data II but also the envelope plate f-0IR are changed.

In this embodiment, another data change circuit 151 is provided separately from the data change circuit 51, and this data change circuit 151
Another modified touch data TD2 is created from the touch data TD and given to the divider 152, and this divider 152 converts the envelope plate data from the envelope plate memory 50][iR to the modified touch data T.
D2 is divided, and the resulting modified envelope plate data Er is provided to the envelope counter 55. □ Since the other wt configurations are exactly the same as in the first embodiment, the same parts are given the same reference numerals and the explanation thereof will be omitted.

In this embodiment, the change sensitivity of the data change circuit 51 is set to "
0'' and only the data change circuit 151 can perform change processing, as shown in FIG. 9 (&), the mfi-
When the changed touch data 'I'D2 is "1" due to a key press with a force of
When it is smaller than lJ, the envelope rate increases, as shown by the chain line, and the speed of pitch change becomes faster.
The duration of the change will be shorter, but when the changed touch data TD2 is larger than rLJ with a weaker key press than mf, the rate of the envelope will become smaller as shown by the solid line, and the speed of the change in pitch will slow down, resulting in a change in pitch. The duration becomes longer.

In this way, the speed at which the pitch of the musical tone changes varies depending on the magnitude of the touch force.

Also, if the change sensitivity of the changed touch data 'rD1 is set to a smaller value than the other changed touch data TD2,
As shown in Figure 9(b), not only the rate but also the level of the envelope changes, so the envelope waveform shown by the dotted line when the mf key is pressed changes as shown by the chain line and solid line, and the musical tone changes. Not only the speed of change but also the range of change will change at the same time.

Furthermore, if the change sensitivity of the changed touch data '1' DI is set to the same value as the changed touch data TD2, then
), the rate and level of the envelope change in the same way, so the duration of the change does not change at all,
Only the height of the entire envelope will change.

Furthermore, if the change sensitivity i of the change touch data TD1 is set to a larger value than the change touch data TD2, unlike the case in FIG. I will do it.

[Effects of the second embodiment]

In this embodiment, in addition to the level of envelope data E,
Since the rate is also changed, the content of the change depending on the key touch force of the musical tone can be freely set as shown in FIG. 9.

In the above embodiment, the envelope waveform is made up of 7 tales, a first decay, and a second decay. However, an envelope waveform with sustain and release, a triangular wave, a trapezoidal wave, etc. may also be used. The data PQ is not fixed and may be set to any value, and the envelope data E is added to the adder/subtractor 5 accordingly.
In step 8, only subtraction or addition may be performed, and the element that changes the musical tone may be not only the pitch but also the shape of the musical sound waveform, etc. [Effects of the Invention] As described above, the present invention In this method, the level (height) of each point or the rate (slope) of each part of the envelope waveform signal used for changing the musical tone content is changed at any time according to the magnitude of the key touch force, and the content of the musical tone change is determined by the key. Since it reflects the touch force, for example, if the key pressing force is strong, the width and speed of the pitch change will be large, and if the key pressing force is weak, the width and speed of the pitch change will be small. Even if the same effect is obtained, the content changes subtly to reflect the touch response, making it possible to obtain a sound that is closer to natural musical sounds, increasing the expressiveness of the performance, and making it possible to create musical sounds using envelope waveform signals. Since the content is changed, it is possible to change the content of the musical tone in accordance with the envelope of the musical tone itself, resulting in effects such as being able to obtain a more natural sound than J.

[Brief explanation of drawings]

Fig. t6 is an overall circuit diagram of the touchless dance device, Fig. 2 is a circuit diagram of the key switch circuit 10 in Fig. 1, and a switch provided in one key, and Fig. 3 shows the waveforms of signals at each part of Fig. 1. 4 is a circuit diagram of the frequency information generating circuit 50 of FIG. 1 to FIG. 5 is a circuit diagram of the level data changing circuit 56 of FIG. 4, and FIG. 6 is a circuit diagram of the frequency information generating circuit 5 of another embodiment. FIG. 7 is a diagram showing the contents of the envelope data, and FIGS. 8 and 9 are diagrams showing states in which only the level and both the level and rate of the envelope data E are changed, respectively. 6... Tabuchi data generation circuit, 4... Engelof generation circuit, 5... Frequency information generation circuit, 6... Waveform generation 11it circuit, 7... Sound system, 50.
...Envelope plate memory, 51.151...Data change circuit, 52...Envelope memory, 53.
... Level data change circuit, 54 ... Envelope status circuit, 58 ... Addition/subtraction device, 152.516.
...Divider, 512.514...2's complement circuit. 1, Ii-74, +. , . 1,, 2nd figure □ , 1 □ , 1 ′・ □ 1 figure 1, stone 1 descent S Figure 3 ζ - Afif 2 M data note 81
! I 13 SL: 15 Bit Chi 7
Figure 4 Figure 7 17 crows

Claims (2)

[Claims] (1) Touch data generation means for generating touch data by detecting key pressing speed or key pressing pressure; Envelope level storage means for storing envelope level data indicating the level of each point of an envelope waveform; and the envelope level data. an envelope level changing means for changing the envelope level according to the magnitude of the touch data; an envelope plate storage means for storing envelope plate data indicating the rate of each part of the envelope waveform; and the changed envelope level data and the envelope plate. an envelope generating means for generating an envelope waveform signal based on the generated envelope waveform signal; and a musical sound generating means for generating and emitting a musical tone based on the generated envelope waveform signal, A touch response device characterized by reflecting speed or key press pressure. (2) touch data generation means for generating touch data by detecting key press speed or key press pressure; envelope level storage means for storing envelope plate data indicating the rate of each part of the envelope waveform; Envelope plate changing means for changing according to the magnitude of the touch data; envelope level storage means for storing envelope level data indicating the level at each point of the envelope waveform; and the changed envelope plate data and the envelope level. an envelope generating means for generating an envelope waveform signal based on the generated envelope waveform signal; and a musical sound generating means for generating and emitting a musical tone based on the generated envelope waveform signal, A touch response device characterized by reflecting speed or key pressing pressure.