JPS59100498A - 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 of the Invention] The present invention relates to an electronic musical instrument having an automatic rhythm performance function.

[Prior art]

Some conventional electronic musical instruments capable of automatic rhythm performance have a fill-in rhythm pattern prepared in addition to the normal rhythm pattern, and can be switched during performance to change the rhythm performance. In the case of stereo-type electronic instruments, the sound image localization or volume is fixed and varied for each rhythm sound source to give a stereo feeling, and in the case of monaural-type electronic instruments, the volume changes when it comes to fill-in. Devices that control the volume at a constant level or change the volume have also been put into practical use.

[Problems with conventional technology]

As mentioned above, conventional electronic musical instruments have fixed sound image localization and volume of rhythm sound sources, which has caused many users to feel dissatisfied.

[Purpose of the invention]

To provide an electronic musical instrument that can perform automatic squirrel AJ performance with more variety and a richer stereo feel than before. □Thing 7. a,'! -,,,1・:, ・.

[□Key points of invention□: 11””' ” ”
``''' □Sound image localization of the normal rhythm pattern and the Hun Ruin rhythm pattern and 5. It is an electronic musical instrument that can automatically play mem at different volumes, at least on one side.

〔Example〕

Hereinafter, referring to the drawings below, examples of L and T jars will be described.

FIG. 1 shows the configuration of an amplifying section that amplifies a rhythm sound source signal outputted by a rhythm sound source circuit (not shown) and outputs it to subbees (not shown), which are provided one on each side.

Therefore, the entire circuitry of this stereo-type electronic musical instrument, which includes a keyboard and various switches, is not shown.

In the figure, RN, RF, LN, and LF are the amplification □ and the 1st bar for the normal rhythm pattern on the right, the fill-in rhythm pattern on the right, the normal rhythm pattern on the left, and the fill-in rhythm pattern on the left, respectively. , snare drum, claves, high conga 8, :,,! ″1−, □:
I jjf·/< X 5 A (7) Each rim sound source is provided. and each amplified sRN, RF, LN,
r.

11. Mixing part 1 for both F and IRN, T, R'F, 1L
N,1,, LP and operational amplifier section 2RN, 2RF,,
It consists of 2LN and 2LF. The mixing resistor IRN consists of variable resistors R1, R, 2, R3, R4, R5, R6, and R7 for the bibutton, cymbal, snare drum, clave, bass drum, high conga, low conga, and bass drum, and one end of each of the variable resistors R1, R2, R3, R4, R5, R6, and R7. A rhythm sound source signal from a corresponding rhythm sound source is applied, and the other end is connected to the terminal of the operational amplifier 3RN of the operational amplifier section 2RN.

Other mixing resistor part iRp:1. 'L N, I
The configuration of LF is also exactly the same, and variable resistors R8 to R
14, R15 to R21, R22 to R, and 28, and the other ends connected in common are the corresponding operational amplifiers 3RF and 3L.
N, connected to the H input terminal of 3LF. The same predetermined power supply voltage is supplied to the input terminals of each of the operational amplifiers 3RN, 3RF13LN, and 3LF, and a variable resistor R29 for adjusting the volume is connected between each output terminal and each (→input terminal).
130, R31, and R32 are l! has been done. Further, the outputs of the operational amplifiers 3RN, 3RF, 3LN, and 3LF are sent to the speaker via transfer gates 4.5.6.7, respectively. Transfer gate 4.5 is each
Control signal R from CPU (central processing unit, not shown)
is applied to each gate via the inverter 8 or directly to control opening and closing. Further, the transfer gates 6 and 7 are controlled to open and close by receiving control signals from the CPU via the inverter 9 or directly by applying them to each gate. The CPU controls the entire operation of the electronic musical instrument.

Further, all of the variable resistors are provided at the switch input section. Furthermore, the values of the variable resistors R,1 to R2'4 can distribute the sound image localization to seven locations at equal intervals. is set to a value like

Next, the operation will be explained. Each of the variable resistors R1 to I12 is automatically adjusted prior to the start of the music performance, and the sound image localization for each rhythm sound source and the volume ratio of the left and right speakers are set. For example, as shown in Figure 2, when playing a normal rhythm pattern, the claves, snare drum, and bass drum are localized in the center, and the cymbal and bass drum are placed first to the left of the center.
Localize the low conga, the first bay bat on the right, and the high hunga. On the other hand, when filling in, the 6th left, 2nd left, 1st left, center, 1st right, 2nd right, □ 3rd right are the bass drum, low conga, hyphunga, snare drum, claves, cymbal, and bibat, respectively. Distribute and localize. Then, for example, a variable resistor R
If the resistance ratio of 1 and R15 is 1 = 6, the ratio of the inflow current will be the opposite, so the sound image localization of the bibat sound is set to the 6th position on the right. If the ratio is 2=5.3:3.4:2.5:2.6:1, then the second right, the first right, the center, the first left, and the second left
It is localized to the 3rd position and the 3rd position on the left, respectively.

On the other hand, if variable resistor R2'9 is made larger than R30, the volume of the right speaker will be louder when it is normally filled in than when it is filled in, and on the other hand, if variable resistor R29 is made smaller than R30, the volume will be louder when it is filled in. becomes. The same is true for the variable resistors R31 and R32 for the left speaker.

When the above-mentioned setting operations are completed, the automatic rhythm performance is started after operating the selection switch between the normal rhythm pattern and the fill-in rhythm pattern. For example, normal E?
The CPU sets the control signals L1N to □logic level "0".
”+, I'+01+, opening the transfer gate 4.6, and opening the transfer gate 5.7.
close. As a result, the rhythm sound gun signal from each rhythm sound source is transmitted through the variable resistors R, j1 to R7, l' (15 to R21
After being set to a value according to each setting value in the operation 7, the signal is mixed, further amplified to the size set in the operation 7, and then passed through a transfer gate 4.6 and then mixed. Alternatively, it is sent to the left speaker, and the sound is emitted with the sound image localization and volume shown in FIG.

On the other hand, when 1 fill-in is selected, the control signals L1R are output as "1" and 1', respectively. Therefore, transfer gate 5.7 is opened and transfer gate 4 is opened.
．． 6' is closed. After each rhythm sound source signal is set to a value corresponding to the respective set value by variable resistors R8 to R14 and l' (22 to R24), the mixing sum and operational amplifier 3
It is amplified to the respective sizes set by RF and 3LF, and one game is transferred)! The sound is transmitted to the right or left speaker through the 5.7E and distributed in several layers as shown in FIG. 2 through sound image localization.

Incidentally, in the above-mentioned embodiments, stereophonic and electronic musical instruments are used, but the present invention can also be applied to modern electronic musical instruments with regard to volume control. Further, the change in sound image localization +i is not limited to 7 locations, but may be any value as long as it is 3 or more. Furthermore, the number and types of rhythm sound sources are not limited to the above embodiments, and may be arbitrary.

[Rumei's effect]''□ As explained above, automatic rhythm performance is possible in which at least one of the sound image localization and volume of the normal rhythm pattern and the fill-in rhythm pattern is made different from each other at any time. Since it is an electronic musical instrument, it has the advantage of being able to perform with a wider sense of stereo mem- ling than conventional instruments.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a main part of an embodiment of the present invention, and FIG. 2 is a diagram showing setting examples of sound image localization in a normal rhythm pattern and a fill-in rhythm pattern. RN, RF, LN, LF...Amplification section, iRN,
IRF, ILN, ILF...Mixing resistor section, 2RN, 2RF, 2LN, 2LF...Opamp volume, 4-7...Transfer gate,
8.9...Inverter. Patent/Application, Person Casio Computing Co., Ltd. Figure 1 LR PU, Figure 2

Claims (2)

[Claims] (1) In an electronic musical instrument having an automatic rhythm playing means,
A first setting means for determining the sound image localization of the rhythm sound of the normal rhythm pattern, and a second setting means for determining the sound image localization of the rhythm sound of the fill-in rhythm pattern, and the apparatus includes a first setting means for determining the sound image localization of the rhythm sound of the fill-in rhythm pattern, and includes a first setting means for determining the sound image localization of the rhythm sound of the fill-in rhythm pattern, and a second setting means for determining the sound image localization of the rhythm sound of the fill-in rhythm pattern. An electronic musical instrument characterized by changing the sound image localization of rhythm sounds depending on the time. (2) The first setting means and the second setting means each determine the volume in addition to the sound image localization, and the sound image localization of the rhythm sound is determined when playing the normal squirrel b butter > performance 1 f FN and fill-in rhythm patterns. 2. The electronic musical instrument according to claim 1, wherein the electronic musical instrument has different volumes.