JP2530691Y2 - Automatic rhythm playing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an automatic rhythm playing device, and more particularly to an improvement in an automatic rhythm playing device that does not give an unnatural feeling when a rhythm pattern is switched.

[Background of the invention]

2. Description of the Related Art Conventionally, there has been known an automatic rhythm playing device that performs automatic rhythm accompaniment according to a rhythm pattern stored in advance.

In this type of automatic rhythm playing device, there is a problem that, for example, when switching from a four-bar pattern to a two-bar pattern during the automatic rhythm performance, the flow of the music becomes unnatural.

FIG. 6 shows such an example, in which (A) shows a four-bar pattern and (B) shows a two-bar pattern. For example, as shown in (C), the fourth bar pattern of the four-bar pattern is used. If it is switched to the first bar of the two-bar pattern in the bar, it is extremely unnatural.

As described above, in an automatic rhythm accompaniment apparatus in which a rhythm pattern accommodating includes a 4-bar pattern and a 2-bar pattern, the above-described unnaturalness is eliminated. I haven't done anything yet.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and in an automatic rhythm playing apparatus capable of playing a rhythm pattern of a four-bar pattern and a two-bar pattern, when an rhythm is switched to another rhythm pattern during performance, it is unnatural. It is an object of the present invention to provide an automatic rhythm performance device improved so as not to make the user feel uncomfortable.

[Outline of the invention]

That is, the present invention is characterized in that the rhythm pattern is switched as shown in FIG. 1 in order to achieve the above-mentioned object.

(A) When switching to the 2-bar pattern rhythm performance during the 4-bar pattern rhythm performance, (A) When switching to the 2-bar pattern at the second bar of the 4-bar pattern, Rhythm performance starts from the second measure (see FIG. 1 (A)). (B) When switching to the two-measure pattern at the third measure of the four-measure pattern, from the first measure of the two-measure pattern Start rhythm performance (see FIG. 1 (B)). (C) When switching to two-bar pattern at the fourth bar of the four-bar pattern, start rhythm performance from the second bar of the two-bar pattern (See FIG. 1 (C)). (B) When the rhythm performance of the two-bar pattern is switched to the rhythm performance of the four-bar pattern, (D) the repetitive reading of the two-bar pattern is an odd number of times, In the second measure, 4 bars puta When the mode is switched to rhythm, the rhythm performance starts from the second measure of the four-measure pattern (see FIG. 1 (D)), and (E) the repetitive reading of the two-measure pattern is an even-numbered time. When switching to the four-bar pattern in the first bar, the rhythm performance is started from the third bar of the four-bar pattern (see FIG. 1 (E)). When the pattern is switched to the fourth measure pattern in the second measure, the rhythm performance starts from the fourth measure of the four measure pattern (see FIG. 1 (F)).

〔Example〕

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a diagram showing the overall circuit configuration. In the figure, reference numeral 1 denotes a CPU for controlling all the circuit operations of the present embodiment, which comprises a microcomputer and the like.

A keyboard 2 is connected to the CPU 1, and a key group for controlling automatic rhythm performance (representative ones are shown in broken lines in the figure), a keyboard having white keys and black keys, and the like. It exists in the keyboard 2.

Reference numeral 2-1 denotes a rhythm switch for designating, for example, a rhythm performance of rock A (hereinafter referred to as rhythm No. 1), and rhythm No. 1 is a four-bar pattern. Reference numeral 2-2 denotes a rhythm switch for designating, for example, a rhythm performance of rock B (hereinafter referred to as rhythm No. 2), and rhythm No. 2 is a two-bar pattern.

In addition, there are a plurality of switches for designating other rhythm patterns, but they are omitted in the figure. And code 2
Reference numeral 3 denotes a start / stop switch for designating start and stop of the rhythm performance according to the selected rhythm pattern.

The CPU 1 is connected to a ROM 3 in which rhythm patterns, programs for controlling various performances, and data are stored. The specific contents of the ROM 3 are shown in FIG. 3 and FIG.

That is, the ROM 3 includes at least a rhythm pattern header section and a rhythm pattern data section. The rhythm pattern header section includes rhythm switches 2-1 and 2-2.
In addition to storing the header (start address) of the storage address of the rhythm pattern selected by the above-described method, an SF flag indicating whether the rhythm pattern is a two-bar pattern or a four-bar pattern is recorded. Now this SF flag is
0 indicates that the pattern is a two-bar pattern, and 1 indicates that it is a four-bar pattern.

In the rhythm pattern data, for example, one timing is represented by 8 bits, and each bit corresponds to a rhythm sound source name. If this content is 1, the rhythm sound is generated, and if it is 0, no rhythm sound is generated. Then, as will be described later, in the case of a four-bar pattern, one type of rhythm pattern consists of 64 × 8 bits according to 64 timings, and in the case of a two-bar pattern, half of that, that is, 32 timings, 32
× 8 bits.

Reference numeral 4 in FIG. 1 denotes a rhythm counter (RC), which is a 2-bit beat counter (HC), a higher-order 2-bit beat register (HB), and a highest-order 2-bit bar register (SR). ) In hexadecimal.

When this beat register (HR) is 00, it indicates the first beat, when 01 is the second beat, when it is 10, the third beat, and when it is 11, the fourth beat is represented. When (SR) is 00, it indicates the first measure, when 01, the second measure, when 10, it indicates the third measure, and when 11, it indicates the fourth measure. The rhythm counter 4 counts up +1 by a clock generated from a rhythm pulse generator (PG) 5 at a tempo set by the player in advance.

Reference numeral 6 in FIG. 1 denotes an SF flag register.
SF read from the rhythm pattern header of ROM3
The contents of the flag are transferred and stored here.

The CPU 1 gives various commands to the melody tone generator 7 so as to generate a musical tone (melody tone) determined by operating the keyboard and various switches, and also generates a rhythm tone signal that actually generates a rhythm tone signal in accordance with the rhythm pattern. 8,
Give various instructions.

The melody sound source signal and the rhythm sound source signal output from the melody sound source unit 7 and the rhythm sound source unit 8, respectively, are added by the adder 9, and then supplied to the sound system 10,
It becomes an audio signal.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG.

First, in step S1, it is judged whether or not the automatic rhythm performance has been started by operating the start / stop switch 2-3. If NO, the process stays in step S1, and if YES is determined, then Proceed to step S2.
In this step S2, it is judged whether or not the bar register (SR) in the rhythm counter 4 is equal to or greater than 10, that is, whether or not the bar is in the third bar and thereafter.

Now, for example, if the rhythm counter 4 is all zero, the flow proceeds to step S3 because it is NO, and the value obtained by adding the value of the header stored in the header part of the designated rhythm to the value of the rhythm counter 4 is added. , And sends out the corresponding rhythm pattern data to the rhythm tone generator 8 to generate one or more rhythm sounds (step S4).

Then, in the next step S5, the tempo clock from the rhythm pulse generator 5 is given to judge whether or not the rhythm timing has come. If NO, this step S5 is repeated, and if YES, For example, in the next step S6, the rhythm counter 4 is incremented by +1.

Then, the process proceeds to step S7, in which the rhythm stop is judged by the operation of the start / stop switch 2-3, and if the rhythm is stopped, the automatic rhythm performance is stopped.

If NO is determined in this step S7, the step
Proceeding to S8, it is detected whether the rhythm performance has been switched by the rhythm switches 2-1 and 2-2, etc., and if there is no change in the rhythm selection, a NO determination is made and the process proceeds to step S2. Repeat S2 → S3 → S4 → S5 → S6 → S7 → S8.

If the contents of the measure register (SR), which is the most significant 2 bits of the rhythm counter 4, become 10 or more, the process goes to step S9 to judge the contents of the SF flag register 6. In other words, the contents of the SF flag in the rhythm pattern header portion are transferred and stored in the SF flag register 6 in accordance with the rhythm selection. As described above, the processing after step S3 is executed next.

If the content of the SF flag register 6 is 0 and the bar pattern is a two-bar pattern, step S9 is followed by step S10.
Then, the value of the above-described address header plus the value represented by the remaining bits except the most significant bit of the rhythm counter 4 is set as the address of the ROM 3. That is, in the case of a two-bar pattern, as shown in FIG. 1 (particularly, FIG. 2D), the first two bars (when the bar registers SR are 00 and 01) and the second two bars (the bar register SR is 10 bars). And 11), the same rhythm pattern is generated, and the addresses to be specified are also in the first half and the second half.
The same area is specified in the bar. For such an operation, the process of step S10 is executed. Then, after step S10, the process proceeds to step S4.

If the rhythm pattern is switched to a different rhythm pattern while the rhythm is being played according to the current rhythm pattern, the judgment in step S4 is YES, and the process proceeds to step S11. In step S11, the rhythm pattern header portion of the specified rhythm is accessed from the ROM 3, stored in the CPU 1, and prepared for the subsequent processing.
Transfer to SF flag register 6.

Then, the process proceeds to step S9. In step S9, the process proceeds to step S3 (when the SF flag register 6 is 1) or to step S10 (when the SF flag register 6 is 0) according to the contents of the SF flag register 6 of the switched rhythm.
), And the following processing is repeatedly executed as described above.

As a result, when the rhythm performance is switched to the two-bar pattern (SF = 0) during the rhythm performance of the four-bar pattern,
When switching to the two-bar pattern in the second bar of the bar pattern, rhythm performance starts from the second bar of the two-bar pattern, and switching to the two-bar pattern in the third bar of the four-bar pattern. In this case, the rhythm performance starts from the first bar of the two-bar pattern, and when the bar is switched to the two-bar pattern in the fourth bar of the four-bar pattern, the rhythm starts from the second bar of the two-bar pattern. Start playing.

During a two-bar pattern rhythm performance, a four-bar pattern (SF
Is switched to the rhythm performance of 1), the repetitive reading of the two-bar pattern is an odd number, and when the bar is switched to the four-bar pattern in the second bar, the second bar of the four-bar pattern starts from the second bar. When the rhythm performance is started, the repetitive reading of the two-bar pattern is an even number, and when the first bar is switched to the four-bar pattern, the rhythm performance is started from the third bar of the four-bar pattern, The repetitive reading of the two-bar pattern is an even number, and the second bar
When the mode is switched to the bar pattern, the rhythm performance starts from the fourth bar of the four bar pattern.

As described above, in the present embodiment, even when the rhythm is switched from the two-bar pattern to the four-bar pattern or vice versa from the four-bar pattern to the two-bar pattern during the rhythm performance, the unnaturalness is eliminated and the performance can be continued smoothly. it can.

[Effect of the invention]

As described in detail above, the present invention has an advantage that the performance effect is improved because the rhythm performance can be switched smoothly and without any unnaturalness.

[Brief description of the drawings]

1 to 5 are diagrams showing the present invention, FIG. 1 is an explanatory diagram of a selected rhythm pattern by switching automatic rhythm performance, and FIG. 2 is a circuit configuration diagram of one embodiment of the present invention. ,
FIG. 3 is an explanatory diagram of the contents stored in the ROM 3 of FIG. 2, FIG. 4 is a diagram showing a data format of the rhythm pattern data section of FIG. 3, and FIG. FIG. 6 is an explanatory diagram of a rhythm pattern of an automatic rhythm performance according to a conventional example of the present invention and a selected rhythm pattern by switching the rhythm pattern. 1 ... CPU, 2 ... Keyboard, 2-1, 2-2 ... Rhythm switch, 3 ... ROM, 4 ... Rhythm counter, 6 ... S
F flag register, 8 ... Rhythm sound source section.

Claims (1)

(57) [Scope of request for utility model registration] 1. An automatic rhythm playing device which performs an automatic rhythm performance according to a rhythm pattern of a four-bar pattern and a two-bar pattern, wherein when the rhythm performance of the four-bar pattern is switched to the rhythm performance of the two-bar pattern, A) means for starting a rhythm performance from the second bar of the two-bar pattern when switching to the two-bar pattern in the second bar of the four-bar pattern; and (B) means for starting the rhythm performance in the third bar of the four-bar pattern. Means for starting a rhythm performance from the first measure of the two-bar pattern when switched to the two-bar pattern; and (C) for switching to the two-bar pattern at the fourth bar of the four-bar pattern. Means for starting a rhythm performance from the second measure of the measure pattern; and determining whether the repeated reading of the two measure pattern is an odd number or an even number. Equipped with a stage,
When the rhythm performance is switched to the four-bar pattern during the rhythm performance of the two-bar pattern, (D) the repeated reading of the two-bar pattern is an odd number, and the two-bar pattern is switched to the four-bar pattern in the second bar. Means for starting rhythm performance from the second bar of the four-bar pattern; and (E) when the repetitive reading of the two-bar pattern is an even number, and when the first bar is switched to the four-bar pattern. Means for starting a rhythm performance from the third bar of the four-bar pattern; and (F) when the repeated reading of the two-bar pattern is an even number, and when the second bar is switched to the four-bar pattern, Means for starting a rhythm performance from the fourth measure of the four-measure pattern.