JPS59102292A - 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 that can automatically control the sound image localization of performance sounds.

[Prior art]

BACKGROUND ART Conventionally, electronic devices that automatically control the sound image localization of performance sounds to obtain a stereo effect have been put into practical use.

[Problems with conventional technology]

When arpeggio sounds are produced in this type of electronic equipment, the sound image localization is always constant in response to changes in the scale, and the performance lacks interest.0 [Object of the Invention] An object of the present invention is to provide an electronic musical instrument in which the sound image localization for the generated musical sound changes accordingly.

〔Example〕

Hereinafter, one embodiment will be described with reference to FIG. 2. Figure 1 is a circuit diagram of an electronic musical instrument with a sound image localization switch. 1 is a matrix circuit including the keyboard and image localization switch;
The pressed state of the keys and the on/off state of the sound image localization switch are scanned and read by the central processing unit (CPUJ2).Then, the information necessary for generating music is sent to the musical tone generator 4.5. .5, the sound image localization circuit 8
．． Send to 9. The sound image localization circuit 8.9 receives the sound image localization information of the digital signal from the CPU 2, and outputs musical sound signals of two levels: channel AI4.16, channel B15, and F. The output musical tone signals are added for each channel A14.16 and channel B15.17, and then sent to the speaker 12.
13, the sound image is localized and produced, such as a piano on the left and a violin on the right.

Although FIG. 1 shows an example in which sound image localization of musical tones of two tones is performed, it goes without saying that it is possible to perform sound image localization of musical tones of two tones, but it goes without saying that it is also possible to perform sound image localization of musical tones of two tones.

The second cell is a specific circuit configuration diagram of the sound image localization circuit 8 (the same applies to 9), and includes a control voltage generation circuit 20, a reference voltage generation circuit 21, low-pass filters 22 and 23, and a VC
'A (-pressure controlled amplifier) 24.25 and force). The control vehicle pressure generation circuit 20 is controlled by a 3-bit digital signal sent as sound image localization information from the CPU 2 and input to S4, S2, and Sl, and is controlled by an analog multiplexer 201 having a 3-bit digital signal decoder.
．． 202, and two sets of resistors R□, R2, R8, R4, R6, and R6 connected in series to divide the voltage generated by the reference voltage generating circuit 21 to obtain a predetermined voltage. Analog multiplexers 201 and 202 are opened in response to a 3-bit digital signal and output to input terminals. ,Dl
, D2, D3, D4, D, , D, output terminal O
The voltages el to e7 at the voltage dividing points connected to the UT by the resistors R1 to R6 are connected to the analog multiplexer 201.20.
The voltage e1 at the voltage dividing point is connected to the input terminal D6 of the analog multiplexer 201.
If connected to , it becomes an input terminal in analog multiplexer 202 . Then, the voltage e2 at the voltage dividing point must be connected to the input terminal D5 of the analog multiplexer 201.
In the analog multiplexer 202, the input terminal is
The voltages e1 to e7 at the voltage dividing points are output from the output terminals OUT and become the control voltages of the VCA24.25, and the voltages e1 to e7 at the voltage dividing points are As shown in Figure 3, the amplification factor of the VCA 24 for the controlled heart rate is a solid line a, and the amplification factor of the VCA 25 for the controlled vehicle pressure is a broken line.

Therefore, the sum of the sounds L1 emitted from the speakers 12,132> is always constant, and an electronic musical instrument whose sound image localization can be freely and reliably changed according to changes in the digital signal of the sound image localization information can be obtained. In addition, although vCA has various characteristics, it can be handled by setting the voltage dividing resistor of the control voltage generation circuit 2°, so it is not affected by the characteristics of VCA, and furthermore, the sum of the volume can be adjusted. For example, the volume can be set to be maximum when the sound image is localized to the center of the left and right speakers, rather than being kept constant, depending on how the resistors are set.

Furthermore, the low-pass filters 22.23 are connected to the analog multiplexers 201.2o2 when the input terminals of the analog multiplexers 201.2o2 are selected and the controlled vehicle pressure is output.
It is affected by the internal resistance (on-resistance) of 202 and is received by a high-impedance buffer, and the output U-change is made smooth by the resistor and capacitor. Therefore, it is preferable to include such a low-pass filter, since it is possible to prevent clicking noise caused by sudden changes in the VCA 24.250 control voltage.

The storage device 3 shown in FIG. 1 is composed of RAM (Random Access Memory), etc., and stores musical score information, allows automatic accompaniment to an automatic performance under the control of the CPU 2, and records temporal changes in sound image localization information. By memorizing changes in timbre and timbre, it is possible to obtain a unique effect in which various timbres move and intersect.

If NS4, S2, and S+ are set as control signals that take numerical data from 0 to 6, seven sound image localization positions can be set as shown in the four beats. In other words, if the center sound image localization position is set to the numerical data [3], then the numerical data is [2], [1].
, "0" is the first left (Ll), second left (R2), third left (R3) with respect to the center, and the numerical data r
4J, ``5'', and ``6'' can set the sound image localization positions of the first right (R1), the second right (R2), and the third right (R3), respectively. Bakun data of arpeggio sounds as shown in FIG. The numerical data for localizing the sound image to the right side is set as shown in FIG. 5, and stored in the storage device 3 for 4 degrees. In this case, the sound image localization information of each arpeggio note S4, Sl, S
l is set in units of sixteenth notes.

In the case described above, when the arpeggio sound shown in FIG. 5 is produced, R3, R2, Ll, C (center), C5R1, R2, R3, R3, R2, R1,
When the respective sound image localization positions of SC, C, Ll, R2, and R3 are set with respect to the scale change of the arpeggio pattern of the musical instrument shown in FIG. 5, an unprecedented and interesting performance effect can be obtained. Wait,
The arpeggio+7J tempo changes as the tempo volume is set, and therefore the sound image localization also changes in accordance with this tempo.

〔Effect of the invention〕

As explained above, since an electronic musical instrument has been provided in which the sound image localization of the arpeggio sound changes in accordance with the change in the scale of the arpeggio sound, there is an advantage that a novel performance effect not seen before can be obtained. .

[Brief explanation of the drawing]

The first part is a circuit diagram of an embodiment of this invention, the second figure is a specific circuit diagram of a sound image localization circuit, the third figure is a diagram showing the relationship between VCA control voltage and amplification factor, and the fourth figure is a sound image localization circuit. A diagram showing the relationship between position and sound image localization information S2, Sl, and Sl, FIG. 5 is an example of a musical score of an arpeggio pattern and sound image localization information S4 for it
, Sl, and SI. 2...CpU, 3...Storage device, 4.
5...Music sound generation circuit, 8.9...Sound image localization circuit, S4, Sl, Sl...Sound image localization information, L1 to L3, C, R, ~R8. −・・・Sound image localization position.

Claims (1)

[Claims] An electronic musical instrument comprising a sound image localization control means for controlling the sound image localization of a performance sound using sound image localization information, characterized in that the sound image localization is changed in accordance with a change in the scale of an arpeggio sound.