JPS60146295A - Electronic musical instrument - 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 Technical Field The present invention relates to an electronic musical instrument, and more particularly to an electronic musical instrument having an automatic accompaniment function.

Prior Art Conventionally, when performing a one-finger performance on an electronic musical instrument with an automatic accompaniment function, the rhythm was started and stopped by carefully operating a synchronized start button provided on the electronic musical instrument. Therefore, when you want to play a song, turn on the synchronized start button and the rhythm goes to star 1 at the same time as you play the new song, but on the other hand, when you want to end the performance, turn off the synchronized start button. It will continue without stopping unless there is. Moreover, stopping the rhythm at the same time as the song was extremely difficult as a performance technique and was actually impossible.

As a result, even after the performance was over, only the rhythm remained, making it extremely jarring to listen to.

OBJECTS OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its purpose is to provide an electronic musical instrument that can stop the rhythm at the same time as the end of a song with a simple operation.

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a melody keyboard section, an accompaniment keyboard section, and a one-finger playing means capable of playing a chord based on the depression of a certain key in the accompaniment keyboard section. and a rhythm playing means capable of playing a rhythm performance, and when one key in the accompaniment keyboard section is pressed and the IC is pressed, the rhythm performance by the rhythm performance means starts and the accompaniment! I! The gist of the electronic musical instrument is that the electronic musical instrument is configured so that the rhythm performance by the rhythm performance means is stopped when at least two or more keys on the board are pressed simultaneously.

EXAMPLE An example embodying the present invention will be described below with reference to the drawings.

Figure 1 shows the entire electronic musical instrument, with the keyboard section 2 of the instrument body 1.
is provided with 49 melody keys (hereinafter simply referred to as keys) 3, to which predetermined pitch names of the LC scale are assigned. Also, among these keys 3, the 12 keys 3 on the left side are used as accompaniment (chord) N, and by appropriately selecting these keys, 12 kinds of fundamental tone names (chord names) shown in Fig. 1 can be created. selected.

On the back side of the musical instrument body 1 is a rhythm selection switch 4, which serves as a rhythm performance means that allows you to select rhythms such as march and waltz.
A one-finger switch 5 is also provided, which is used when playing chords with one finger. Furthermore, on the back side of the instrument body 1 is a rhythm star I switch 6 that is used to start or stop the rhythm independently.
A synchro start switch 8 is provided as a rhythm playing means used to start the rhythm at the same time as the beginning of the song or stop the rhythm at the same time as the end of the song, and a tempo lamp 8 made of a -H photodiode is provided. has been done. Tempo lamp 8 is set to 1 when playing rhythm.
It is designed to be lit at the beginning of each measure of the 31-note rhythm. Note that the speaker 9 is arranged on the right rear side of the musical instrument main body 1.

Next, the electric circuit of the electronic musical instrument configured as described above is connected to the second
This will be explained according to the diagram.

A central processing unit (hereinafter referred to as CPU) 11 inputs ON signals from the 49 keys 3, rhythm selection switch 4, one-finger switch 5, rhythm start switch 6, and synchro start switch 7, and stores it in a read-only memory. (hereinafter referred to as ROM) 12 operates according to a control program stored therein. The ROM 12 stores note name data associated with the 49 keys 3 and note name data associated with the 12 keys 3 used for the "-C" selection, as well as each rhythm selection. Rhythm data associated with switch 4 is stored. The oscillator 13 outputs a clock signal to the CPLJll to form a rhythm star, and the oscillation frequency of the clock signal can be varied using a volume switch (not shown).

One CPU starts the rhythm and chord simultaneously based on the ON operation of synchro star 1 to switch 7.
[It has a second function (Single Star 1-mode), and in the same synchronized start mode, when at least two or more of the 12 accompaniment keys 3 on the left side (chord > m etc.) are pressed simultaneously, the rhythm and chord can be played simultaneously. The CPU 11 also has a function (stop mode) for switching the left side 12 keys 3 as accompaniment keys (one finger mode) based on the ON operation of the one finger switch 5. ) Process the motion so as to cover it.

1. The generator 1/I synthesizes musical tones based on each note name data output from CI) and filters 15.
Then, musical tones are output from the speaker 9 via the amplifier 16. The rhythm tone generator 17 synthesizes musical tones of various instruments necessary for rhythm performance based on the rhythm data output from C1) Ull, and reads the synthesized tones from the speaker 9 via the amplifier 16 during rhythm performance. A rewritable memory (hereinafter referred to as RAM) 18 is configured to temporarily store various data read from the ROM 12 by CPtJll at a predetermined address.

Next, the operation of the electronic musical instrument configured as described above will be explained.

After turning on a power switch (not shown), a predetermined rhythm is selected from among the rhythm selection switches 4. Next, the same rhythm starts at the same time as the one-finger performance, and the same rhythm also starts at the same time as the performance ends. When you turn on the sync [1 start switch 7],
The synchro start flag built into the CPU 11 is turned on and the CPU 11 selects the synchro start mode.

Next, when the one-finger switch 5 is turned on to perform one-finger performance, the one-finger flag also built into the CPU 11 of CPIJII is hit and the one-finger mode is selected.

When the synchronized start and one-finger mode is selected, the CPU 11 depresses the key 3, which is one of the 12 accompaniment keys on the left side, while checking whether the rhythm L1 is being output from the speaker 9 or not.

Then, when the performer presses the accompaniment key 3, cPUll responds to the press of this key 3 and plays the accompaniment! The pitch name data constituting the chord corresponding to c3 is determined, and the determined pitch name data is output to the tone generator 14, and the rhythm data selected by the rhythm selection switch 4 is read from the ROM 12 for rhythm use. Output to tone generator 17.

Based on this note name data, the tone generator 14 outputs a chord corresponding to the pressed key 3 from the speaker 9.
Ru. On the other hand, at the same time, rhythm tone generator 1
7 outputs the rhythm corresponding to the selected rhythm selection switch 4 from the speaker 9 based on the rhythm data. When the rhythm is output from the speaker 9 at the same time as the chord, the cPUll outputs the rhythm from the speaker 9. Start one-finger playing motion while continuing to do so.In other words,
In this state, cpui"+ is accompaniment key 3 and melody -
Based on the depression of the key 3, musical tones corresponding to the accompaniment key 3 and the melody key 3 are outputted from the speaker 9 via the 1-band generator 14, thereby performing one-finger performance.

When the performer presses two or more accompaniment keys 3 just before the end of the song, the CPLll will set the stop flag built in the CPU II to the cellar 1 based on the presses of these two or more accompaniment keys 3. Then move from synchro start mode to stop mode, and change the accompaniment IR3 (
111 (stops the output of chords and rhythm sounds that were selected and executed first).

Thus, in this embodiment, the rhythm performance starts at the same time as the song is played, and the rhythm performance also stops at the same time as the song ends, so that the beginning and end are aligned and do not make the music unpleasant to listen to. This will allow you to perform beautifully. Moreover, the rhythm can be stopped by operating the accompaniment key 3 (K), making rhythm performance very easy.

Effects of the Invention As detailed above, the present invention includes a melody keyboard section, an accompaniment keyboard section, and the accompaniment If! Comprising a one-finger playing means capable of playing a chord based on the depression of one key in the board, and a rhythm playing means capable of playing a rhythm performance,
When one key in the accompaniment keyboard section is pressed, rhythm performance by the rhythm performance means is started, and when at least two or more keys in the accompaniment keyboard section are pressed simultaneously, the rhythm performance starts. By configuring the rhythm performance by the means to be stopped, it is possible to stop the rhythm at the same time as the end of the song with a simple operation.

[Brief explanation of the drawing]

Figure M1 is a front view of an electronic musical instrument embodying this invention;
The figure is an electrical block circuit diagram of the electronic musical instrument, and FIG. 3 is a flowchart showing the operation of the central processing unit. In the figure, 1 is the main body of the instrument, 2 is the keyboard section, 3 is the key, 4 is the rhythm selection switch, 5 is the one-finger switch, 7 is the sync switch, 9 is the speaker, 11 is the central processing unit (CPU), 14 is a 1-tone generator, and 17 is a rhythm tone generator. Patent applicant Hironobu Onda, agent and patent attorney for Brother Industries, Ltd.

Claims (1)

[Claims] Melody! ! A board section (3), an accompaniment keyboard section (3), and a one-finger playing means (5) capable of playing a chord based on pressing a certain key (3) in the accompaniment keyboard section (3).
and a rhythm performance means (7) capable of performing a rhythm performance, and a certain 1! of the accompaniment keyboard section (3). When (3) is pressed, rhythm performance by the rhythm performance means (7) is started and the accompaniment Ia? An electronic musical instrument characterized in that the rhythm performance by the rhythm performance means (7) is stopped when at least two or more keys (3) in the J11 section (3) are pressed simultaneously.