JPH0428000A - Musical sound controller for electronic musical instrument - Google Patents

Abstract

PURPOSE:To simultaneously produce sounds of plural channels by providing a second sound production signal generating means which outputs a sound production signal to each channel based on the sound production signal which is generated by a first sound production signal generating means and designates a simultaneous sound production group. CONSTITUTION:A first sound production signal generating means 3 which generates the sound production signal for each combination of channels based on the output of an assigner 2 and a second sound production signal generating means 5 which outputs the sound production signal to each channel based on the combination of channels designated by a simultaneous sound production channel designating means 4 and the sound production signal, which is generated by the first sound production signal generating means 3 and designates a simultaneous sound production group, are provided. Channels where sounds should be simultaneously produced are preliminarily designated by the designating means 4, and the simultaneous sound production group is designated to simultaneously give the sound production signal to plural channels, and sounds are simultaneously produced. Thus, completely simultaneous sound production is possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a musical tone control device for an electronic musical instrument that is capable of simultaneously producing sound from a plurality of channels.

[Conventional technology]

Traditionally, electronic musical instruments use microcomputers to control the sound produced according to key presses, and when two or more tones are produced for a single key press, the number of channels corresponding to the number of tones are sounded simultaneously. was. In this case, assuming that each channel starts generating musical tones when it receives a sound signal,
Virtually simultaneous sound generation was achieved by continuously sending sound generation signals to channels that were to produce simultaneous sound.

[Problem to be solved by the invention]

However, in such conventional electronic musical instruments, interrupt processing is performed while continuously sending sound signals, for example, in order to generate rhythm, timer interrupts at regular intervals or MIDI (Musical Instruments) sent from other musical instruments are processed.
When an interrupt or the like occurs due to a ment Digital Interface) signal, there is a problem in that the start of sound generation is shifted between channels. For example, if the start of an IKHz musical tone is shifted by 0.5 milliseconds, the phase of the musical tone will be shifted by 180 degrees.

Therefore, there was a problem in that the phases of musical tones were canceled due to the occurrence of interrupt processing.The present invention is intended to solve such problems when simultaneous sound is produced by conventional electronic musical instruments. Technical RM is to specify a combination in advance and send a sounding signal for each combination of channels so that a plurality of channels can be sounded at the same time.

[Means to solve the problem]

The present invention includes a plurality of channels that generate musical tones, a simultaneous sound channel specifying means that specifies a combination of channels that start sounding simultaneously, an assigner that assigns which simultaneous sound group is to be sounded based on the output of a keyboard circuit,
a first sound signal ordering means that generates a sound signal for each combination of channels based on the output of the assigner, a combination of channels specified by the simultaneous sound channel designation means, and a simultaneous sound generation group formed by the first sound sound signal generation means. The apparatus is characterized in that it includes a second sound generation signal generating means for outputting a sound sound signal for each channel based on a specified sound sound signal.

[Effect]

According to the present invention having such characteristics, channels to be sounded simultaneously are specified in advance by the simultaneous sound generation channel specifying means, and by specifying a simultaneous sound generation group, sound generation signals are given to a plurality of channels at the same time. I'm trying to be able to pronounce it.

〔Example〕

Next, an embodiment of the present invention will be described with reference to FIG. In this embodiment, a simultaneous sound group represents each combination of channels that produce simultaneous sounds, and numbers are added starting from the 0th to create the 0th simultaneous sound group, the 1st simultaneous sound group, etc. It is called.

In FIG. 1, reference numeral 1 denotes a keyboard circuit composed of a keyboard, etc., and its output is given to an assigner 2. The assigner 2 is constituted by a microcomputer and is used to allocate which simultaneous sound generation group is to be sounded based on the key depression signal obtained from the keyboard circuit 1. Assigner 2
is the key press data signal 311. In addition to the simultaneous sound generation group designation address signal S12, a write signal S13 is applied to the first sound generation signal generation means 3. The first sound generation signal generating means 3 latches the key press data sent from the assigner 2 according to the simultaneous sound group designation address, and generates a sound for each simultaneous sound group corresponding to the 0°, 1st, ... simultaneous sound group. It generates signals 320 to S23. Further, the simultaneous sound generation channel designation means 4 receives designation data S30 to S3 for designating channels to be sounded simultaneously based on a table to be described later.
3, and these signals are applied to the second sound generation signal generating means 5. The sound signal generating means 5 generates sound signals 340 to S43 for each channel. The sound generation signals of each channel are applied to the signal generating sections of the Oth to third channels which generate musical tones, respectively.

The output of each channel is then given to the sound system 10 and output as an audio signal.

FIG. 2 is a circuit diagram showing a specific configuration of the first sound generation signal generating means 3. As shown in FIG. In the figure, the musical tone signal generating means 3 has a decoder 21 for decoding the simultaneous sound group designation address signal S12, and the output thereof is applied to AND circuits 22-25, respectively. A write signal S13 from the assigner 2 is applied to the other input terminals of the AND circuits 22-25.

AND circuits 22-25 provide AND outputs to D-type flip-flops 26-29, respectively. Each of the flip-flops 26 to 29 receives key press data S11 at its D input terminal, and generates the O to third simultaneous sound generation based on the key press data and the AND signal of each AND circuit 22 to 25. It holds the group's sound signal.

FIG. 3 is a circuit diagram showing the detailed structure of the second sound generation signal generating means 5. In FIG. In this figure, the outputs of bits 0 to 3 of simultaneous sound channel designation data S30 to S33 are output from AND circuits 30 to 33, 34 to 37, 38 to 41, and 42 to 42, respectively.
45.

Also, the AND circuits 30, 34, 38, and 42 receive the sound generation signal S20 of the Oth simultaneous sound generation group, and the AND circuits 31, 35, and 3
At 9.43, the sound generation signal 521 of the first simultaneous sound generation group is applied. Also, the AND circuit 32゜36, 40, 44 receives the sound generation signal S22 for the second simultaneous sound generation group, and the AND circuit 33.
．． 37, 41, and 45 are also supplied with the third simultaneous sound generation group sound generation signal S23. Each AND circuit supplies these logical product signals to four-person chaor circuits 46, 47, 48, and 49, respectively, and the logical sum signals are applied to the sound generation signals 340 to 340 of each channel.
43 and is output to channels 6 to 9.

Next, the operation of the musical tone control device according to this embodiment will be explained. In this embodiment, a case will be described in which two tones are produced in response to one key press. It is assumed that there are four channels, the first channel of O9 is simultaneously sounded as the 0th special sound group, and the second and third channels are simultaneously sounded as the first simultaneous sound group. Simultaneous sound channel designation data for simultaneous sound generation is set in advance in the simultaneous sound generation channel designation means 4.

The simultaneous channel designation data in this embodiment is as follows:
Shown in the table.

Bits 0 to 3 of the simultaneous sound channel designation data 330 to S33 in Table 1 indicate the status regarding the 0th to 3rd simultaneous sound groups, respectively, and each channel corresponds to a bit with a value of 1 in the simultaneous sound channel designation data. Belongs to a simultaneous pronunciation group. Then, simultaneous pronunciation is performed between values belonging to the same simultaneous pronunciation group.

Now, when no key is pressed in the keyboard circuit 1, the sound generation signals S20-23 and S40-44 are all O.

When a key is pressed on the keyboard circuit 1, an assigner 2 assigns which simultaneous sound generation group is to be sounded in accordance with the pressed key. Here's the second one. Assume that the first simultaneous sound group to which the third channel belongs is to be sounded. Then, key press data s11 is changed to °“l゛, simultaneous sound group specification address S
12 as “I 11” and write signal 313 as “°
When the key depression data is changed from 0° to 1°, the key press data is stored in the DFF 27, and the sound signal S21 of the first simultaneous sound generation group becomes 1°. Therefore, when the sound generation signals S23, 322, 321, and 320 are collectively displayed in order, they become "0010", and the simultaneous sound generation channel designation data S32. for the 2nd and 3rd channels. S33
When expressed in the order of bits 3 to 0, they are "0010°". Therefore, in FIG. 3, the OR circuits 48 and 49 are "
As a result, the sound signals S42 and 43 for the second and third channels become "1°" and the second
．． Sound generation signals are applied to the third channels 8 and 9, respectively, and sound generation starts simultaneously. Thus, the second. The third channel starts sounding at the same time, and musical tones are played through the sound system 10. At this time, the simultaneous sound generation designation data S30 for the 0th channel and the simultaneous sound generation channel designation data S31 for the 1st channel are both "0001", so the sound generation signal 340 of the 0th channel and 341 of the 1st channel are both "°0". It remains as it is, and no pronunciation is performed.

In this way, according to this embodiment, multiple channels that are to be sounded simultaneously are specified in the same simultaneous sound group, and a sound signal is generated for each simultaneous sound group, so all the specified channels start sounding at the same time. be able to.

Note that in this embodiment, two tones are generated for each key press, but it is also possible to generate one tone for each key press (this is called independent sound generation). In this case, each channel can be designated to its own individual sound generation group. Table 2 shows the simultaneous sound generation channel designation data. Also No. 0. 1st. In order to simultaneously generate the third channel and independently generate the second channel, the simultaneous generation channel designation data may be set as shown in Table 3, for example.

Table 2 (blank below) Table 3 Also, in this embodiment, the combination of the number of channels to be sounded simultaneously was specified in advance by the simultaneous sounding channel designation means 4, but the operation buttons can be set up to specify the simultaneous sounding channels arbitrarily. It may also be possible to set it. Furthermore, in this embodiment, by changing the simultaneous sound generation channel designation data, simultaneous sound can be generated using any combination of all channels. Between the first channel, the second channel. Simultaneous sound generation is possible only between the 3rd channel, and simultaneous sound generation is not possible between the O2 and 3rd channels, in other words, the 0. 1st
The channel is set to the O or the first simultaneous sound group, the second.
It is also possible to limit combinations of simultaneous pronunciations such that the third channel can only be designated to the second or third simultaneous pronunciation group.

In this case, the second sound generation signal generating means 5 is configured as shown in FIG. 4, for example. In this case, the number of AND circuits can be reduced, and the simultaneous sound generation channel designation data can be changed from 4 bits to 2 bits, so that the circuit can be simplified.

Further, in this embodiment, one channel is designated to only one simultaneous sound generation group, but it is also possible to designate one channel to multiple simultaneous sound generation groups. For example, when a sound with a short sounding time and a sound with a long sounding time are to be produced at the same time, the sound with a short sounding time is assigned to only one channel, and that channel is used in common by multiple simultaneous sounding groups, thereby increasing channel usage efficiency. You can also raise it.

〔Effect of the invention〕

As explained in detail above, according to the present invention, it is possible to perform complete simultaneous sound generation by specifying the simultaneous sound generation channels in advance, decoding the sound data, and applying sound signals to multiple channels at the same time. becomes.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the overall configuration of a musical tone control device for an electronic musical instrument according to an embodiment of the present invention, FIG. 2 is a circuit diagram showing a specific configuration of the first sound generation signal generating means 2, FIG. 3 is a circuit diagram showing a specific configuration of the second sound generation signal generation means of this embodiment, and FIG. 4 is a circuit diagram showing another configuration of the second sound generation signal generation means. 1--・--Keyboard circuit 2--------Assigner
3-----First sound generation signal generating means 4-1---
--Simultaneous sound channel specification means 5-----1.
Second sound generation signal generating means 6 to 9--channel 1
0-...-Sound system. Patent applicant Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] (1) simultaneous sound generation channel designation means for specifying a combination of multiple channels that generate musical tones and channels that start sounding at the same time; and an assigner that assigns which simultaneous sound generation group is to be sounded based on the output of the keyboard circuit; a first sound generation signal generation means for generating a sound generation signal for each combination of channels based on the output of the assigner; a combination of channels designated by the simultaneous sound generation channel designation means; and the first sound generation signal generation means. A musical tone control device for an electronic musical instrument, comprising: second sound generation signal generating means for outputting a sound sound signal for each channel based on a sound sound signal designated by a simultaneous sound generation group.