JPS6390790A - Metronome - Google Patents

Abstract

PURPOSE:To smoothly change tempos by switching the tempos in synchronism with the underflow state of a down counter which counts intervals of a tempo. CONSTITUTION:When a tempo changeover switch 1 is pressed, the output waveform of a flip-flop 2 is inverted and inputted to a tempo switching circuit 5. A tempo memory 6 outputs count data corresponding to tempo data to a preset circuit 7. The down counter 8 is in process of counting the tempo 1, so even if the tempo changeover switch 1 is pressed, it keeps on counting the tempo 1. When the down counter 8 enters an underflow state, that is detected by an underflow detecting circuit 9, which outputs a pulse to a preset circuit 7 to as to preset new count data in the down counter 8. Count data on the tempo 2 is preset in the down counter 8 in synchronism with the underflow state and the metronome operates thereafter at a tempo 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to switching between a plurality of set tempos in an electronic metronome that can set a plurality of tempos.

[Summary of the invention]

In an electronic metronome that can set multiple tempos, the present invention does not switch the tempo at the same time the tempo switch is pressed, but synchronizes with the underflow of the down counter that counts the tempo intervals.
By changing the tempo, the tempo can be changed naturally.

[Conventional technology]

Conventional metronomes could only be set to one tempo, so to switch tempos, it was necessary to set the tempo again. Also, even with metronomes that can set multiple tempos, the tempo changes as soon as the tempo switch is pressed, so when changing the tempo, it takes time to reset the tempo, making it impossible to change the tempo quickly. , the switching occurs at the same time as the switch is pressed, resulting in an unnatural switching, which has the disadvantage that it is not possible to practice music where the tempo changes midway.

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, the present invention aims to make it possible to set a plurality of tempos and to naturally switch between tempos.

[Means for solving problems]

In order to solve the above problems, the present invention does not preset new count data to the down counter that counts tempo intervals by the input of the changeover switch, but instead sets the changeover switch to a register that stores the tempo data. With only the selection function, count data of the tempo selected by the switch of the down counter is pre-sensed by the underflow of the down counter.

[Effect]

In the electronic metronome configured as described above, the tempo changeover switch simply has the function of selecting the data to be preset in the down counter, and detects an underflow of the down counter and presets the selected data to the down counter. By doing this, a natural tempo change can be realized without disturbing the tempo before and after the tempo change.

〔Example〕

The present invention will be explained in detail below. FIG. 1 shows a block diagram of a tempo switching section of an electronic metronome implemented in the present invention.

There is a changeover switch 1 for switching between a plurality of tempos, which is connected to the input of a flip-flop 2. The output of the flip-flop 2 is connected to the input of the tempo switching circuit 5, and the tempo data register (1) 3 and the tempo data register (2) 4 are connected to the data input of the tempo switching circuit 5. The data output of the tempo switching circuit 5 is connected to the address input of the tempo memory 6, and the data output of the tempo memory 6 is connected to the data input of the preset circuit 7. An underflow of the down counter 8 is detected by an underflow detection circuit 9, and the output of the underflow detection circuit 9 is connected to the input of the preset circuit 7. The data output of the preset circuit 7 is connected to the data input of the down counter 8.

Next, a case will be described in which the electronic metronome according to the present invention is operated in the above configuration.

FIG. 2 shows a timing chart when the tempo changes.

The A signal in FIG. 2 becomes high level for a certain period of time when an underflow of the down counter 8 is detected by the tempo pulse. The B waveform is the output waveform of the flip-flop 2, and its level is inverted every time the tempo changeover switch 1 is pressed. The C signal becomes high level when the tempo changeover switch 1 is pressed.

Tempo changeover switch 1 is pressed (C signal in Figure 2)
Then, the output waveform of the flip-flop 2 is inverted (signal B in FIG. 2) and input to the tempo switching circuit 5. The tempo switching circuit 5 selects the tempo data register (1) 3 and the tempo data register (2) 4 according to the state of the B signal, and outputs the selected tempo data to the address input of the tempo memory 6.

The tempo memory 6 outputs count data corresponding to the tempo data to the precent circuit 7. Since the down counter 8 is currently counting the tempo 1 shown in FIG. 2, it continues to count the tempo 1 even if the tempo changeover switch 1 is pressed. When an underflow occurs in the down counter 8, it is detected by the underflow detection circuit 9, and the underflow detection circuit 9 outputs a pulse to the preset circuit 7 in order to preset new count data in the down counter 8.

The down counter 8 has a second counter in synchronization with the underflow.
The count data for tempo 2 in the figure is preset, and the metronome will operate at tempo 2 thereafter. By switching the tempo using the underflow signal of the down counter 8 in this way, the tempo can be switched naturally.

〔Effect of the invention〕

Since the electronic metronome according to the present invention has the above-described structure and function, it can naturally switch between a plurality of tempos, so it has the advantage that it can be easily used for practicing music that changes tempo midway through.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a tempo switching section of an electronic metronome implemented in the present invention. FIG. 2 is a timing chart when the tempo changes. 1... Tempo switching switch 2... Flip-flop 3... Tempo data register (1) 4... Tempo data register (2) 5... Tempo switching circuit 6... Tempo memory 7... Preset Circuit 8...Down counter 9...Underflow detection circuit Applicant: Seiko Electronics Co., Ltd.N'

Claims (1)

[Claims] An electronic metronome that can set multiple tempos includes a storage device that can store multiple tempos, a circuit that switches tempo data using a switch for switching tempos, and a storage device that stores count data corresponding to the tempos. An electronic system comprising a counter that counts tempo, a circuit that detects overflow of the counter, and a preset circuit that presets count data in the counter, and that detects overflow of the counter and switches between multiple tempos. metronome.