JPS63234296A - Automatic performer - 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 an automatic performance device for an electronic musical instrument.

2. Description of the Related Art In recent years, electronic organs and electronic keyboards have been equipped with automatic performance functions that automatically output all or part of the melody, accompaniment, and rhythm.

In addition, as a single-function device that only outputs rhythm, a so-called rhythm box that is exclusively used for drum percussion has also been developed (for example, Japanese Patent Laid-Open No. 56-6689).
Publication No. 7).

The above-mentioned automatic performance device will be explained below with reference to the drawings.

FIG. 3 shows the configuration of a conventional automatic performance device.

In FIG. 3, 101 is a tempo adjustment input section, 102 is a tempo control section, 103 is a clock generation section, 104 is a musical tone information memory, 105 is a musical tone generation section, and 106 is a generation/stop instruction section.

The operation of the automatic performance device configured as described above will be explained below.

The tempo adjustment input section 101 outputs a tempo count value in response to an input instructed by a tempo adjustment switch such as a slide volume, in order to adjust the tempo of the automatic performance to be output. That is, when the current tempo count value is 500 m, if the tempo is instructed to be half as fast by inputting a tempo adjustment instruction, a new tempo count value twice the human speed will be output.

Assuming that the tempo count value is X and the speed corresponding to the tempo adjustment instruction input is Y, the equation (1) is obtained.

X=−・・・・・・・・・・・・0) Here, n is a predetermined constant.

The tempo control section 102 counts the clocks output from the clock generation section 103, and when the counting result becomes equal to the tempo count value inputted from the tempo adjustment input section 10f, resets the clock count value to 0. , increments the address to be output to the musical tone information memory 04. If the clock count value and the tempo count value are not equal, the tempo control unit 102 repeats the above operation, but when the generation/stop instruction unit 106 is instructed to stop, the generation/stop instruction unit 106 issues a stop instruction. When the signal is being output, the clock counting operation is stopped and both the clock count value and address are reset.

It is assumed that musical tone information memory 104 stores musical tone information regarding a musical tone desired to be output. Here, musical tone information is information about the start, continuation, and stop of the sound, each expressed in -words, and the information about the start of sound also includes information about the timbre, volume, and pitch in one word. shall be included. Such information - each word corresponds to the minimum unit of musical note expression for automatic performance, and is stored in musical tone information memory 1.
It is assumed that the data are sequentially stored in 04.

The musical tone generator 105 outputs musical tones in accordance with the musical tone information output from the musical tone information memory 104 corresponding to the address output from the tempo control section 102.

After the tempo has been adjusted through the above-described operations, the generation/stop instruction section 106 temporarily stops the output and then starts generation at the timing desired for output.

Problems to be Solved by the Invention However, with the above configuration, the tempo set at the time of adjustment may change due to changes in the user's musical environment during tempo adjustment and during automatic performance after tempo adjustment. There was a problem in that the tempo during automatic performance seemed too fast or too slow.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide an automatic performance apparatus that can determine a tempo based on an input corresponding to a designated tempo immediately before the start of an automatic performance.

Means for Solving the Problems In order to achieve this object, the automatic performance device of the present invention has an input section that generates a timing signal corresponding to a timing corresponding to an input tempo, and a clock generator that outputs a clock. When the start signal output from the start/stop instruction section, which instructs the start and stop of automatic performance, and the start/stop instruction section are input, the calculation becomes ready for calculation, and the tempo setting is determined from the timing signal and the clock. A tempo calculation section that calculates and outputs a tempo count value as a reference value, a tempo control section that receives the tempo count value and a clock as input and outputs a signal corresponding to the tempo of automatic performance, and a tempo control section that outputs a signal corresponding to the tempo of automatic performance. and a performance output section that sequentially updates and outputs the performance output according to the signal.

Effect: With this configuration, when the start/stop instruction section is instructed to start automatic performance, the tempo calculation section becomes ready to perform tempo calculation. The tempo input section detects a plurality of tempo timing inputs input in a predetermined pattern and outputs a corresponding timing signal. The tempo calculation unit measures the time interval between the timing signals output from the tempo input unit, calculates and determines the tempo by performing an averaging process corresponding to the predetermined pattern, and calculates and determines the tempo. Output the count value. The tempo control section starts clock counting when the tempo count value is input, and outputs a signal corresponding to the tempo to the performance output section, so that the performance output section outputs a performance at a tempo corresponding to the tempo input. It happens.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of an automatic performance device according to an embodiment of the present invention.

In FIG. 1, 1 is a tempo input section, 2 is a tempo calculation section, 3 is a start/stop instruction section, 4 is a tempo control section, and 5 is a performance output section. In addition, 103 is a clock generation section, 104
106 is a musical tone information memory, and 106 is a musical tone generator, which have the same structure as the conventional example.

First, when the start/stop instruction section 3 is instructed to start automatic performance, the start/stop instruction section 3 outputs a start signal. A predetermined pattern, for example, 1.2, 3.4 (Tan, Tan, Ri/, Tan) when playing in four beats.
When the tempo timing is inputted four times to the tempo input section 1 according to the predetermined pattern, the tempo input section 1 outputs a timing signal corresponding to the tempo timing input four times.

The tempo calculation unit 2 calculates three time intervals (T I 2 e”) between the four timing signals output from the tempo input unit 1.
23 + "54 seconds)" is obtained by counting the clocks output from the clock generator 103.

Therefore, the four timing signals are respectively Sl, S2*S
,,S4, the respective time intervals are T12°T231T54, and when the clock count values are respectively N13 r N25 r N54, "i i
++ ``” i 1-Hl” ” D=' 52s3)
−(2).

Here, n is the time interval of the clock.

The tempo calculation unit 2 obtains the tempo count value N using the following equation.

3.m Here, m is a numerical value determined corresponding to the minimum unit of note expression for automatic performance described in the conventional example, and in the case of a 16th note, lm=4.

Generally, when it comes to an h note, m = −・−・−・−(4).

The tempo calculation unit 2 counts clocks after the timing signal S4 even while calculating the tempo count value, and after calculating the tempo count value N, repeats counting until the clock count value becomes equal to New. When the count value of the clock becomes equal to N-m, the tempo calculation unit 2 outputs the tempo count value N to the tempo control unit 4, and then instructs the tempo control unit 4 to start tempo control.

The tempo control section 4 instructs the first performance output in response to the instruction to start tempo control outputted from the tempo calculation section 2, and starts counting the clocks outputted from the clock generation section 103. Repeat the same actions as in the example.

The performance output section 6 will sequentially update the performance output according to the timing of the signal corresponding to the tempo output from the tempo control section 4. Note that the above operation is performed by the tempo calculation unit 2 when the start/stop instruction unit 3 is instructed to stop.
It stops when the tempo control section is instructed to stop.

The relationship between the above signals is shown in FIG.

As described above, according to this embodiment, when the predetermined pattern is, for example, 1.2, 3.4 (Tan Tan Tan Tan), that is, 4 beats, the tempo equivalent input is 4 times. When the input is input to the input section 1, the tempo calculation section 2 detects the fourth input and simultaneously calculates the tempo count value, and uses the calculated tempo count value to calculate the sixth timing, so it is equivalent to one measure. Automatic performance output is possible from the timing of the next first beat after the input corresponding to the tempo is made.

Note that in the above, the predetermined input pattern to the tempo input section 1 is a pattern of every beat in 4 beats, but it is also possible to use a pattern using 3 beats or strong beats. , these are achieved by transforming equation (3) in accordance with the pattern and time signature to obtain a count value equivalent to one beat.

Effects of the Invention The present invention averages a group of count values corresponding to a time interval of an input timing sequence in which a tempo calculation unit performs tempo-equivalent input to a tempo input unit according to a predetermined pattern. Since the tempo count value is calculated by performing the processing, the user can perform automatic performance corresponding to the tempo equivalent input simply by instructing the input section to specify the tempo he or she wants to use for automatic performance. 0 that can be implemented

[Brief explanation of drawings]

FIG. 1 is a block diagram of an automatic performance device according to an embodiment of the present invention, FIG. 2 is an exemplary relationship diagram of data according to an embodiment of the present invention, and FIG. 3 is a block diagram of a conventional automatic performance device. be. 1...Tempo input section, 2...Tempo calculation section, 3...Start/stop instruction section, 4...
・Tempo control section, 6...Performance output section, 103.
...Clock generation section. Name of agent: Patent attorney Toshio Nakao and one other person

Claims (1)

[Claims] An input section that generates a timing signal corresponding to the timing equivalent to the input tempo, a clock generation section that outputs a clock, and a start/stop section that instructs the start and stop of automatic performance.
When a start signal outputted from the stop instruction section and the start/stop instruction section is input, a calculation becomes possible, and a tempo count value that is a reference value for tempo setting is calculated from the timing signal and the clock; a tempo calculation unit that outputs the tempo count value; a tempo control unit that receives the tempo count value and the clock as input and outputs a signal corresponding to the tempo of automatic performance; and a performance output section that sequentially updates and outputs performance output.