JP2508578Y2 - Automatic accompaniment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an automatic accompaniment device that automatically generates accompaniment sounds such as rhythm sounds and bass sounds by electronic sounds.

[Outline of device]

This invention proposes to operate the start instructing means again during automatic accompaniment with a normal pattern rhythm in the automatic accompaniment device, reset the memory reading means for controlling the reading of data from the automatic accompaniment pattern memory, and read out the memory. The means is controlled so that the pattern data of the variation pattern is read from the first data, and at the intended timing during the automatic accompaniment,
It is designed so that changes to rhythm patterns different from odd time signatures can be realized at the same time.

[Conventional technology]

As a conventional automatic accompaniment apparatus, there is an automatic rhythm performance apparatus as described in Japanese Utility Model Laid-Open No. 52-70436.

This device puts the rhythm performance into the rhythm run state and the rhythm stop state by turning the start switch on and off, and by the push switch on and push off of the foot switch, the rhythm performance and the rhythm run start in synchronization with the key operation. The state is repeated alternately, the rhythm stop is performed by turning on the foot switch during the rhythm run, and the rhythm run is performed waiting for the key to be pressed again.

When an attempt is made to perform accompaniment of a rhythmic rhythm in which the time signature changes with such a conventional device, the start switch is turned off and then turned on again in the middle of the bar during the rhythm run, or the foot switch is turned twice. I had to either turn it on.

However, if such an operation is performed, it will take some time from the rhythm stops until the rhythm runs again, and in addition to the inconvenience that the rhythm sound will not be output once, two operations must be performed. There was a problem that the intended timing was shifted.

Therefore, for example, as disclosed in Japanese Utility Model Publication No. 58-12224, when the rhythm start switch is turned on, the oscillator and the counter for incrementing by the clock signal to generate the count signal for forming the rhythm pattern signal are reset, There is also an automatic rhythm playing device in which the sound is generated from the first beat.

Further, as seen in, for example, Japanese Utility Model Laid-Open No. 56-75794, a pulse signal is reset by a start signal from a control terminal, and a pulse generated by the pulse oscillator or a pulse obtained by dividing the pulse oscillator is used to obtain a desired pattern from the pattern matrix. In the automatic rhythm playing device that outputs the rhythm pattern of, if a variation switch is provided between the control terminal and the start switch and the variation switch is switched during automatic performance, the variation pulse with a predetermined cycle rises. There is also one that resets the pulse oscillator and repeats stopping at the falling edge so that only the head portion of the rhythm pattern during automatic performance can be repeatedly output.

[Problems to be solved by the invention]

According to the former, if the rhythm start switch is turned on again during the automatic rhythm performance, it will be returned to the beginning and restarted even in the middle of the rhythm pattern at that point. Can be realized.

However, the rhythm pattern that occurs even after the change of time signature is the same as before, so the change was poor.

According to the latter, various changes can be given during the automatic rhythm performance by changing the cycle and duty ratio of the variation pulse.

However, even in this case, the rhythm pattern itself output from the pattern matrix does not change,
Since only the cycle of outputting a part of it or the duty ratio changes, it was not possible to realize a time signature that fluctuated sufficiently.

It is an object of the present invention to solve the problems in the conventional automatic accompaniment apparatus, and enable simultaneous one-touch operation at the intended timing for changing the time signature and rhythm pattern during automatic accompaniment.

[Means for solving problems]

Therefore, as shown in the functional block diagram of FIG. 1, the automatic accompaniment apparatus according to the present invention has an automatic accompaniment pattern memory C storing pattern data of normal patterns and variation patterns which are different rhythm patterns for automatic accompaniment. A memory reading means B for reading pattern data from the automatic accompaniment pattern memory C, and an accompaniment sound generating means for generating an accompaniment sound according to the pattern data read from the automatic accompaniment pattern memory C by the memory reading means B. D and start instruction means A for instructing the start of automatic accompaniment
When the start instructing means A gives an instruction to start the automatic accompaniment, the memory reading means B is controlled so as to read the pattern data of the normal pattern, and the automatic accompaniment is started. And an automatic accompaniment control means E for resetting the memory reading means B when the start instructing means is operated and controlling the memory reading means B to read the pattern data of the variation pattern from the top data thereof. Be prepared.

[Action]

According to this automatic accompaniment apparatus, when the start instruction means A instructs the automatic accompaniment start, the automatic accompaniment control means E causes the memory reading means B to read the pattern data of the normal pattern from the automatic accompaniment pattern memory C. Let it be done and start the automatic accompaniment with the rhythm of the normal pattern.

When the start instruction means A is operated again after the start of the automatic accompaniment, the automatic accompaniment control means E resets the memory reading means B, and the pattern data of the variation pattern from the automatic accompaniment pattern memory C to the memory reading means B is reset. Is read from the first data.

Therefore, at the timing when the start instruction means A is operated again during the automatic accompaniment to instruct the odd time signature, a rhythm of a variation pattern different from that before is started from the beginning of the pattern, which is rich in variation. It is possible to realize automatic accompaniment.

〔Example〕

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

FIG. 2 is a block diagram showing the construction of an automatic rhythm playing device which is an embodiment of the present invention.

In the figure, reference numeral 1 generates a key depression signal and key data (note data) of the depressed key when the key is depressed on the keyboard. Reference numeral 2 is a central processing unit (CPU) that controls the entire apparatus, 3 is a program memory (ROM), 4 is a working memory (RAM) including registers for counters and flags, which will be described later. It constitutes a computer.

5 is a rhythm pattern memory (RO that stores data of various rhythm patterns (march, waltz, samba, etc.)
M), the automatic accompaniment pattern memory C in FIG.
Is equivalent to

6 is a group of operators, for example, as shown in FIG. 3, a large number of rhythm select switches and variation select.
A rhythm selection switch group 60 composed of switches, a start switch 61 corresponding to the start instruction means A in FIG. 1 and a stop switch 62 which is an automatic accompaniment stop means are provided.

Reference numeral 7 is a tempo oscillator, which generates a tempo clock serving as a reference for the rhythm tempo, and periodically interrupts (INT) CPU2.

A rhythm sound forming circuit 8 forms rhythm sounds of various rhythm instrument sounds such as drums, cymbals, and maracas according to the rhythm pattern data read from the rhythm pattern memory 5.

Reference numeral 9 is a tone forming circuit, which forms a tone by the key depression signal generated by the keyboard 1 and the key data.

The rhythm sound formed by the rhythm sound forming circuit 8 and the musical sound formed by the musical sound forming circuit 9 are amplified by the amplifier 10 and electro-acoustic converted by the speaker 11 to generate the sound. To be done.

These rhythm sound forming circuit 8, amplifier 10 and speaker 11
Thus, it plays the role of the accompaniment sound generating means D in FIG. The functions of the memory reading means B and the automatic accompaniment control means E shown in FIG.

Here, the counters, registers, and flags provided in the RAM 4 and used in the following description will be described.

TCL: Counter that counts the tempo clock generated by the tempo oscillator 7 for one measure (or two measures) (note that TC
Whether L is a one-bar counter or a two-bar counter is determined according to whether each pattern data stored in the rhythm pattern memory 5 is one bar or two bars. It ) RUN: Rhythm run flag (“1” when the rhythm is running, “0” when the rhythm is not running) RV: Rhythm variation flag (When each rhythm pattern has normal and variation, normal is “0” ", The variation is" 1 ") VAR: Variation number register (if there are multiple variations, the register that sets the variation number) Also, the rhythm pattern memory (ROM) 5 stores the data shown in FIG. As shown in the format, the normal pattern and variation pattern (N ₁ , N ₂ , ...) Of each rhythm pattern are “1” and “1” for various sound sources (drums, cymbals, maracas, etc.) for each predetermined address area. 0 "(" 1 "
Is stored as a sound data pattern.

Next, the processing operation relating to this invention by the CPU 2 of FIG. 2 will be described with reference to the flow charts of FIGS.

FIG. 4 shows a main routine. When the main routine is started, first, initialization processing is performed to clear each register. After that, the keyboard 1 and the operator group 6 in FIG. 2 are scanned to detect operator information (including key depression information).

Then, it is judged whether or not there is a change in the detection information,
When there is a change, the processing according to the operator is performed.

If it is the key depression information of the keyboard 1, the key data is output to the tone forming circuit 9 which is the keyboard tone generator circuit.

If it is an on event of the start switch 61 (FIG. 3), the process of the rhythm start routine described later is performed.

If the rhythm stop switch 62 (FIG. 3) is an on event, the rhythm run flag RUN and the counter TCL are cleared to "0". If there is a bar flag bar, clear it as well.

If the rhythm selection switch group 60 (FIG. 3) is on event of rhythm selection, the start address (n in FIG. 9) of the rhythm pattern memory 5 in which the pattern data corresponding to the newly selected rhythm type is stored. ₁ , n ₂ , n,
......) start address) is set.

The rhythm start routine checks, for example, whether the rhythm run flag RUN is "1" as shown in the basic processing example of FIG. 5, and if it is "1", it is set to "1", and if it is "1", If the rhythm is running, the counter TCL is reset and the process returns to the main routine shown in FIG.

By doing this, the counter TCL counts the tempo clock from "0" again, and the rhythm pattern memory 5
The reading of the data of the selected rhythm pattern from the beginning address is started.

The first embodiment of FIG. 6 is a case where the normal pattern and the variation pattern are alternately stored in the rhythm pattern memory 5 for each rhythm type, and RUN is "1".
At this time, the counter TCL is reset and the rhythm variation flag RV is set to "1".

Therefore, when the start switch 61 is turned on again during the rhythm performance, the rhythm performance of the variation of the rhythm starts from the beginning.

The second embodiment of FIG. 7 is a case where there are a plurality of variation patterns of each rhythm type, and when RUN is "1", the counter TCL is reset and the rhythm variation flag RV is set to "1". , Put the output RAND of the random data generator that randomly specifies one of the variation patterns into the variation number register VAR.

Therefore, when the start switch 61 is turned on during the rhythm performance, the rhythm performance of one randomly specified variation among the plurality of variations of the rhythm is disclosed from the beginning.

FIG. 8 is a flow chart showing the operation of the rhythm interrupt routine executed every time the interrupt signal INT is input from the tempo oscillator 7 of FIG. 2 in synchronization with the tempo clock.

When this routine starts, first check if RUN is "1", and if it is "0", return to the main routine without doing anything, and if it is "1", increment the count value of the counter TCL by +1. .

Then, check whether the count value of TCL is "24"("48" when TCL is a two-bar counter) and check "2".
If it is "4" (or "48"), reset the TCL to "0", and if it is not "24" (or "48"), leave the TCL of the rhythm pattern selected from the rhythm pattern memory 5 unchanged. The data for one sounding timing at the address corresponding to the count value is read out, output to the rhythm sound forming circuit 8, rhythm sound source drive processing is performed, and the process returns to the main routine.

According to each of these embodiments, when the start switch 61 is turned on during the rhythm run, the counter TCL is reset and the rhythm pattern memory 5 starts from the head address of the variation pattern for the selected rhythm pattern. Since the reading of data is started immediately, it is possible to realize the change of the automatic rhythm performance and the change of the rhythm pattern at the same time without interruption in one tap.

Although the embodiment in which the present invention is applied to the automatic rhythm playing device has been described, the invention can be similarly applied to a device for performing other automatic accompaniment such as auto bass performance.

[Effect of device]

As described above, according to the present invention, the time signature of the automatic accompaniment and the change of the rhythm pattern can be simultaneously performed seamlessly at the intended timing, and a more varied automatic accompaniment performance can be performed.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing the configuration of an automatic accompaniment apparatus according to the present invention, FIG. 2 is a block diagram showing the configuration of an automatic rhythm playing apparatus according to an embodiment of the present invention, and FIG. 3 is an operation shown in FIG. Arrangement diagram showing a concrete example of the child group 6, FIGS. 4 to 8 are flow charts for explaining the processing operation relating to this invention by the CPU 2 in FIG. 2, and FIG. 9 is the rhythm pattern memory 5 in FIG. FIG. 3 is an explanatory diagram showing an example of the data format of FIG. A ... Start instruction means, B ... Memory reading means C ... Automatic accompaniment pattern memory, D ... Accompaniment sound generating means E ... Automatic accompaniment control means, 2 ... Central processing unit (CPU) 4 ... Working memory (RAM) 5 ... Rhythm pattern memory (ROM), 6 ... Operator group 7 ... Tempo oscillator, 8 ... Rhythm sound forming circuit 60 ... Rhythm selection switch group, 61 ... Start switch 62 ... Stop switch

Claims (1)

(57) [Scope of utility model registration request] 1. An automatic accompaniment pattern memory for storing pattern data of normal pattern and variation pattern which are different rhythm patterns for automatic accompaniment, and a memory reading means for reading the pattern data from the automatic accompaniment pattern memory. An accompaniment sound generating means for generating an accompaniment sound according to the pattern data read from the automatic accompaniment pattern memory by the memory reading means, a start instructing means for instructing start of automatic accompaniment, and an automatic accompaniment by the start instructing means. When the start of the accompaniment is instructed, the memory reading means is controlled to read the pattern data of the normal pattern to start automatic accompaniment, and when the start instructing means is operated after the start, Reset the memory reading means And an automatic accompaniment control means for controlling the memory reading means to read the pattern data of the variation pattern from the top data thereof.