JPS60144797A - Automatic accompanying apparatus - 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 The present invention relates to an automatic accompaniment device for accompaniment of a song or a musical instrument, in which the user sets the accompaniment speed based on input voice from a microphone and starts the performance.

Currently, there are two types of accompaniment for singing and musical instruments: one is a tape recording of the actual performance, and the other is an automatic accompaniment device. A tape recording of an actual performance cannot change the speed without changing the pitch, but an automatic accompaniment device is digitally controlled and has separate pitch and speed data, so the pitch and speed can be adjusted separately. Can be changed independently.

To set the speed of a conventional automatic performance device, the user had to listen to the actual sound and adjust the appropriate speed in advance using a speed setting knob.

Therefore, each time the speed is to be changed, it is necessary to confirm the speed by ear, which is time-consuming and has the disadvantage that it is not possible to set the speed instantly when the singer or performer is performing at the full speed required.

Furthermore, in conventional devices, the time at which a performance starts is set as the time at which a trigger signal is generated by a switch or the like. Therefore, the user or someone else had to press a switch.

Furthermore, since the accompaniment speed of conventional devices is preset, the user cannot predict the speed. Therefore, it is difficult for the user to start singing or playing a song without a prelude.

An object of the present invention is to eliminate the above-mentioned conventional drawbacks and provide an automatic accompaniment device that can control speed setting and performance start by voice, which is the easiest and most effective means for the user. .

The automatic accompaniment device according to the present invention includes means for inputting a sound for counting beats, a sound detection section for detecting the input sound, and an interval calculated based on the detection time of the input sound obtained by the sound detection section. , an interval calculation section that calculates a performance speed and a performance start time from the interval, and an automatic performance section that similarly performs automatic accompaniment from the performance start time according to the performance speed.

According to the present invention, there is no need to set the speed in advance, and the speed can be set as intended by the user during performance. Furthermore, since the speed setting and performance start can be controlled entirely by voice, the user is freed from the need for switches and the like.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

As an example, consider the case of a song with a four-time signature. The user makes a four-beat R-voice of "Tan", "Tan", "Tan", "Tan" from the microphone 1 at a beat of his or her choice.

The voice detection unit 2 sequentially detects the rise time (t□, t2.f3.t4) of the voice input from the microphone 1. The rise time is, for example, as shown in Figure 2, when the amplitude of the input voice changes from a certain level P□ or below to a certain level 2.
The time when level P2 is reached is defined as the time when the level increases to 2 or more within a certain period of time. Here, the number of input voices is preset according to the rhythm of the song.

Next, the interval calculation unit 3 calculates the intervals j1 and t2.13 between each time from the time t1+t2+t3+t4 detected by the voice detection unit. That is, the second
As shown in the figure, i□=t2-tl, 12=t3-t2.
Subtract i3 = t4 - t3. Furthermore, interval 1
From 1, 12, and 13, the length of time for one beat and the performance start time T can be calculated using equations (1) and (2). The automatic performance section 4 shown in FIG. 1 starts automatic accompaniment based on the I and T determined by the -interval calculation section 3.

T= t4+ I (2) ■ in Fig. 2 is the average of the intervals i□+12, 13, and T is the time elapsed from t4.

The automatic performance section 4 can be an electronic musical instrument that automatically performs music according to predetermined musical score data. For example, automatic accompaniment can be realized by using the sound function of Nippon Electric Membrane's PC6000 personal computer. The accompaniment sound is output from the speaker 5.

With this automatic accompaniment device explained above, the user's pattern
The accompaniment begins at the tempo input by the user from the time corresponding to the next ``tan'' after the utterances of ``, ``tan,''``tan,'' and ``tan.''

Here, the voice uttered by the user does not have to be ゛tan'', but ``ichi'', and ``1m-san''.

It can also be ``pashi'', ``6 one'', ``)tsu'', ``three'', ``four'', etc. Further, the means for detecting the voice may be a means for detecting a peak, in addition to the means for detecting the rise time described in the embodiment. In the description, it is assumed that audio is input, but the sound input from the microphone can also be clapping hands, hitting sounds, etc. Furthermore, in order to calculate the interval determined by the interval calculator into the time length I' of 91 beats, in addition to taking the average of the intervals explained in equation (1), (3)
, (4), and (5) take the minimum as shown in equations. Take the maximum. You can only take one.

Knee Min (in) n=1.2.3 -...=(3)
1mMax(in) n=1.2.3...-(4)I
= in n-1or2or3 -・-(5) Also,
In addition to the performance start time explained in equation (2), (6)
It is obvious that what is shown in Eq. can also be used.

T = t1 + 4 Instant speed settings are possible.

In addition, the user is freed from swiss≠, etc., and has the advantage of only having to count one beat. Furthermore, since the user can freely set the performance start time and tempo, it is possible to start singing or playing at the same time as the accompaniment without a prelude. In this way, it is possible to realize an automatic accompaniment device that allows the user to set the playing speed and start playing using only voice.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a time chart showing the operation of FIG. 1. 1...Microphone, 2...Audio detection section, 3...Interval calculation section, 4...
・Automatic performance section, 5...Speaker.

Claims (1)

[Claims] means for inputting a sound that counts beats; a sound detection section that detects the input time of the input sound; an interval is calculated from the detection time of the input sound obtained by the sound detection section; and a playing speed is calculated from the interval; An automatic accompaniment device comprising: an interval calculation section that calculates a performance start time; and an automatic performance section that performs automatic accompaniment from the performance start time according to the performance speed.