JPH03212692A - Musical sound controller for electronic musical instrument - 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 Field of the Invention The present invention relates to a tone control device for an electronic musical instrument that starts sounding a plurality of channels simultaneously.

Conventional technology Conventional electronic musical instruments use a microcombiner.
Sound generation was controlled according to key presses, and when two or more tones were produced in response to a single key press, channels equal to the number of tones were simultaneously sounded. In this case, substantially simultaneous sound generation is achieved by continuously sending sound generation signals to channels that simultaneously generate sounds (which start generating musical tones when they receive and receive sound generation signals).

Problems to be Solved by the Invention However, in the above-mentioned conventional electronic musical instruments, the microcomputer performs interrupt processing (for example, a timer interrupt at regular intervals for producing rhythm sounds) while continuously sending out sound signals. , M I D I (Musical Instrument) sent from other instruments.
When an interrupt caused by a nt Digital Interface signal occurs, there is a problem in that the start of sound generation is shifted between channels. As a result, even if
If the start of sound is shifted by 0.5 milliseconds when a musical tone of IK hertz is being generated, the phase of the musical tone will be shifted by 180 degrees, so there was a problem that the phase of the musical tone would be canceled due to the occurrence of interrupt processing. .

The present invention solves the above-mentioned conventional problems.The present invention sends out sounding signals by specifying which channels are to be sounded simultaneously, and by making the actual sounding start wait until the sounding signals of all the channels that are to be sounded at the same time are ready. To provide a musical tone control device for an electronic musical instrument that allows a plurality of channels to start sounding completely simultaneously even if there is a time lag.

Means for Solving the Problems To achieve this object, the musical tone control device for an electronic musical instrument of the present invention includes: a plurality of channels for generating musical tones; a simultaneous sound generation channel specifying means for specifying channels to start sounding at the same time; A first sound signal generation means that generates a first sound signal; and a second sound signal generation means that generates a second sound signal when the first sound signals of all channels designated for simultaneous sound generation are completed. It is equipped with the following.

Effect: With this configuration, on the channels designated for simultaneous sound generation, the start of sound generation of musical tones is waited until the first sound generation signals of all the specified channels are completed, and when all the specified sound generation signals are completed, all the specified channels are simultaneously activated. The pronunciation begins.

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

FIG. 1 is a block diagram of a musical tone control device in an embodiment of the present invention.

In FIG. 1, 10 is a keyboard circuit, 1 is an assigner (actually a microcomputer is used) that assigns which channel is to be sounded according to the key pressed on the keyboard circuit 10, and 2 is a push button sent from the assigner 1. The key data is latched according to the channel designation address, and the first sound generation signal S20. S21°S22. S23 (0th and 1st respectively)
, 2.3 channels), and 3 is simultaneous sound generation channel designation data S30. S3
1°S32. S33 (for channels 0.1 and 2.3, respectively) simultaneous sound generation channel designation means; 4
is the second sounding signal S40. S41. S42゜543 (respectively for channels 0.1..2.3); 5゜6.7.8 are channels for generating musical sounds (respectively for channels 0.1..2.3); 3 channels)
, 9 is a sound system that reproduces (emits) the generated musical tones.

FIG. 2 is a specific configuration diagram of the first sound generation signal generating means 2. As shown in FIG.

In FIG. 2, 20, 21, 22, and 23 are D flip-flops (hereinafter abbreviated as DFF), 24, 2, which store the first sound generation signals of the 0.1 and 2.3 channels, respectively.
5, 26, and 27 are two-manual AND gates, and 28 is a decoder for decoding the channel designation address sent from the assigner 1.

FIG. 3 is a specific configuration diagram of the second sound generation signal generating means 4. As shown in FIG.

In Figure 3, 40, 41, 42.43 are 4-man power AN
D gate, 401, 402, 403° 404 411.
412,413,414,421゜422.423,4
24,431,432,433゜434 is 2-person OR
It is a gate.

The operation of the musical tone control device for an electronic musical instrument configured as described above will be described below.

In this embodiment, a case will be described in which two tones are produced in response to one key press. It is also assumed that there are a total of four channels, the 0th channel and the 1st channel are sounded simultaneously, and the 2nd channel and the 3rd channel are sounded simultaneously.

The simultaneous sound generation channel designation means 3 is preset with simultaneous sound generation channel designation data for simultaneous sound generation. Table 1 shows the simultaneous sound generation channel designation data of this embodiment.

(From here on) Table 1 Simultaneous sound channel designation data bit 0゜1.2.3
represent states regarding simultaneous sound generation of the 0.1st and 2.3rd channels, respectively, and simultaneous sound generation is performed between bits (that is, channels) whose value is "0". That is, in the simultaneous sound generation channel designation data, the bit corresponding to the channel itself and the bit corresponding to the channel that sounds simultaneously with that channel are rOJ, and the other bits are "1". When no key is pressed in the keyboard circuit 1o, the first sound generation signal S20. S21°S22. S2
3. Second sounding signal S40°S41. S42. , S
43 are all "o". When a key is pressed on the keyboard circuit 10, the assigner 1 assigns which channel is to be sounded in accordance with the pressed key. Below, the second
A case where the channel and the third channel are simultaneously sounded will be explained.

First, in order to sound the second channel, key press data Sll is set to "1", and channel designation address S12 is set to "2".
”, when the write signal S13 is changed from “0” to “1”, the key press data “1” is written to the DFF 22,
The first sound generation signal 822 of the second channel becomes "1". First sounding signal S23. S22. S21. S20 collectively expressed in order is ro 100J, and simultaneous sound channel designation data S32 for the second channel is expressed in order from bit 3 to bit 0 as ro 011J. Second
The sound generation signal S42 remains at "0". Therefore, the second
Channel pronunciation has not yet started.

Next, in order to generate sound in the third channel, as in the case of the second channel, key press data S11 is set to "1", channel designation address S12 is set to "3", and write signal S13 is changed from rOJ to "1". Then, the key press data "1" is written to the DFF 23, and the first key press data of the third channel is
The sound generation signal 823 becomes "1". First sound generation start signal S23°S22. S21. If S20 is collectively represented in order, it becomes rl 100J, and the simultaneous sound channel specification data S33 for the third channel is rollJ, so AN
The second sound generation signal S43 of the third channel, which is the output of the D gate 43, becomes "1", and the third channel starts generating musical tones. At the same time, the second sound generation signal S42 of the second channel, which is the output of the AND gate 42, also becomes "1", and the second channel also starts generating musical tones.

In this way, the second channel and the third channel start sounding at the same time, and musical tones are reproduced through the sound system 9. At this time, the simultaneous sound generation channel specification data S30 for the 0th channel and the simultaneous sound generation channel specification data S31 for the first channel are both rl 100J, so the second sound generation signal S40 of the first channel and the second sound generation signal S40 of the first channel Both sound generation signals S41 remain at "0", and no sound is generated in both channels.

As described above, according to this embodiment, in channels designated for simultaneous sound generation, musical tones are not generated when the first sound generation signals of all channels are not aligned, and only when they are aligned, all channels start generating sound. Therefore, even if there is a shift in sound generation signals between channels, all designated channels can start sound generation at the same time.

Note that in this embodiment, two tones are produced for one key press, but the invention is not limited to this. For example, it is possible to output one tone for one key press with this configuration. (This is called "single pronunciation"). Table 2 shows the simultaneous sound generation channel designation data in this case. Also, the 0th
．． In order to simultaneously generate 1.3 channels and independently generate the second channel, the simultaneous generation channel designation data may be set as shown in Table 3.

Table 2 Also, in this embodiment, the number and combination of channels to be sounded simultaneously are set in advance, but an operation button may be provided so that the designation of simultaneous sounding channels can be arbitrarily set.

Furthermore, in this embodiment, by changing the simultaneous sound generation channel designation data, it is possible to simultaneously sound any combination of all channels. The combinations of simultaneous pronunciations may be limited, such as, "simultaneous pronunciation is possible only between the 0th channel and the 3rd channel, and simultaneous pronunciation is not possible between the 0th channel and the 3rd channel." A specific configuration of the second sound generation signal generating means in this case is shown in FIG.

In Figure 4, 50, 51, 52, 53 are two-man power AN
D gate, 501, 502, 511゜512.521,
522, 531, and 532 are two-man operated OR gates. Compared to the second sound generation signal generation means shown in Fig. 3, the number of two-man OR gates is reduced and the simultaneous sound generation channel designation data is also reduced from 4 bits to 2 bits, so the circuit can be simplified. .

Furthermore, in this embodiment, the channel starts generating sound by the second sounding signal, and although this channel is put into the sounding start state or the sounding start preparation state by the first sounding signal, the generation of musical tones does not proceed. It is also possible to stay in the sound generation start state or the sound generation start preparation state, and then exit from the sound generation start state or the sound generation start preparation state in response to the second sound generation signal, and proceed with the generation of musical tones. This is substantially equivalent to this embodiment.

Furthermore, in this embodiment, even if the start of sound generation for the entire channel is delayed by 0.5 milliseconds from the key press operation, it is not a problem because humans cannot hear it.

Effects of the Invention As described above, the present invention provides a plurality of channels that generate musical tones, simultaneous sound generation channel designation means that designates channels that start sounding simultaneously, and a first sound generation signal that generates a first sound generation signal. By providing a second sound generation signal generating means that generates a second sound signal when the first sound signals of all the channels designated for simultaneous sound generation are completed, it is possible to eliminate the time lag in the sound generation signals. However, multiple channels can start sounding exactly at the same time.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a musical tone control device for an electronic musical instrument according to an embodiment of the present invention, FIG. 2 is a specific configuration diagram of the first sound generation signal generating means of FIG. 1, and FIG. A specific configuration diagram of the second sound generation signal generating means in FIG.
FIG. 3 is another specific configuration diagram of the sound generation signal generating means of FIG. 1...Assigner (microcomputer), 2
...First sound generation signal generating means, 3...
Simultaneous sound generation channel designation means, 4... Second sound generation signal generation means, 5, 6, 7.8... Channels, 9... Sound system, 10...・・・
・Keyboard circuit.

Claims (1)

[Claims] a plurality of channels that generate musical tones; simultaneous sound generation channel designation means that designates a combination of the channels that start sounding simultaneously; first sound generation signal generation means that generates a first sound signal for each of the channels; comprising second sound generation signal generation means for generating a second sound generation signal for all the specified channels when the first sound generation signal is generated on all the channels specified by the simultaneous sound generation channel designation means; A musical tone control device for an electronic musical instrument, characterized in that a musical tone is generated from the channel in response to the second sound generation signal.