JPH038557B2 - - Google Patents

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]

However, in this type of electronic musical instrument,
The sound image localization position of each musical tone does not change at each generation timing of musical tones that are to be produced in sequence, and the sound image localization position of the series of musical tones is fixed to the sound image localization position set in advance before the performance. Therefore, it is not possible to change the sound image localization position at each sound generation timing as the performance sound progresses. As a result, the performance lacked interest.

[Purpose of the invention]

In order to solve these conventional problems, the present invention provides an electronic musical instrument that can control the sound localization position of musical tones at each sound generation timing of musical tones that are to be continuously emitted one after another, thereby increasing special calculation effects. The purpose is to obtain. Moreover, this invention
It is an object of the present invention to provide an electronic musical instrument in which a user can freely set the sound image localization position of musical tones for each generation timing of musical tones to be continuously and sequentially generated.

〔Example〕

Hereinafter, one embodiment will be described with reference to the drawings. Figure 1 is a circuit configuration diagram of an electronic musical instrument including a sound image localization circuit. 1 is a matrix circuit for the keyboard, sound image localization switch, etc., and central processing is performed to control the pressed state of the keys and the on/off state of the sound image localization switch. Scan and read using device (CPU) 2. The information necessary for musical tone generation is then sent to musical tone generators 4 and 5, and the musical tone signals generated by musical tone generators 4 and 5 are formed into timbres by filters 6 and 7, respectively, and then sent to sound image localization circuits 8 and 9. . The sound image localization circuits 8 and 9
It receives the sound image localization information of the digital signal from the CPU 2 and outputs two-level musical sound signals of channels A14 and 16 and channels B15 and 17, respectively. The output musical tone signal is channel A14,1.
6 and channels B15 and 17, and are added to speakers 12 and 13 via amplifiers 10 and 11, respectively.
For example, the sound image is localized and pronounced, such as a piano on the left and a violin on the right.

Although FIG. 1 shows an example of performing sound image localization of musical tones of two tones, it goes without saying that it is possible to perform not only one tone but also three or more tones.

FIG. 2 is a specific circuit configuration diagram of the sound image localization circuit 8 (the same applies to 9), and shows the control voltage generation circuit 2.
0, a reference voltage generation circuit 21, low-pass filters 22 and 23, and a VCA (voltage controlled amplifier) 2
It consists of 4,25. The control voltage generation circuit 20 is
S ₄ is sent out as sound image localization information from CPU2,
Analog multiplexers 201 and 2 are controlled by 3-bit digital signals input to S ₂ and S ₁ and have a 3-bit digital signal decoder.
02, and two sets of resistors R ₁ , R ₂ , R ₃ , R ₄ , R ₅ , R ₆ connected in series to divide the voltage generated by the reference voltage generation circuit 21 and obtain a predetermined voltage. It consists of. Analog multiplexers 201 and 202 open and close according to 3-bit digital signals, and one of the input terminals D ₀ , D ₁ , D ₂ , D ₃ , D ₄ , D ₅ , and D ₆ is connected to the output terminal OUT. . For example, S ₄ , S ₅ , S ₁ =
When 1, 0, 1, input terminal D ₅ is output terminal OUT
connected to.

The voltages e ₁ to e ₇ at the voltage dividing points due to the resistors R ₁ to R ₆ are:
It is connected to each input terminal of analog multiplexers 201 and 202, but if voltage e ₁ at the voltage dividing point is connected to input terminal D ₆ of analog multiplexer 201, input terminal D 0 of analog multiplexer 202 is connected to input terminal D ₀ of analog multiplexer 202. If the voltage e ₂ at the voltage dividing point is connected to the input terminal D ₅ of the analog multiplexer 201, then in the analog multiplexer 202, the voltage e 2 increases with respect to the input terminal D ₁ as shown in FIG.
Connect so that the voltage decreases to the opposite. The voltages e ₁ to e ₇ at the voltage dividing points are output from the output terminal OUT and output from the output terminal VC24,
The control voltage becomes 25, as shown in Figure 3.
The amplification factor for the control voltage of the VCA 24 is a solid line a, and the amplification factor for the control voltage of the VCCA 25 is a broken line b.

Therefore, it is possible to obtain an electronic musical instrument in which the sum of the volumes emitted from the speakers 12 and 13 is always constant, and the sound image localization can be freely and reliably changed in response to changes in the digital signal of the sound image localization information. Also, although VCAs have various characteristics, the control voltage generation circuit 2
This can be handled by setting the voltage dividing resistor of 0, so it is not affected by the characteristics of the VCA.Furthermore, the sum of the volumes is not always constant, and for example, when the sound image is localized to the center of the left and right speakers, the volume is maximum. You can freely set the resistor so that it becomes the same.

Furthermore, when the input terminals of the analog multiplexers 201, 202 are selected and the control voltage is output, the low-pass filters 22, 23 are set to a high level so as not to be affected by the internal resistance (on resistance) of the analog multiplexers 201, 202. It is received by an impedance buffer, and changes in output are smoothed out by resistors and capacitors. Therefore, VCA
It is preferable to include such a low-pass filter because it can prevent clicking noise caused by sudden changes in the control voltages 24 and 25.

The storage device 3 shown in FIG. 1 is composed of a RAM (random access memory), etc., and stores musical score information for automatic performance and automatic accompaniment under the control of the CPU 2, as well as temporal changes in sound image localization information and timbre. By memorizing changes in the timbre, it is possible to obtain a unique effect in which various tones move and intersect.

If the sound image localization information S ₄ , S ₂ , S ₁ is set as a control signal that takes numerical data from 0 to 6, seven sound image localization positions can be set as shown in Figure 4. . That is, if the sound image localization position at the center is numerical data "3", numerical data "2", "1", and "0" are the first left (L1), the second left (L2), and the second left (L2) with respect to the center, respectively. The third on the left (L3), and the numerical data "4", "5", and "6" are the first on the right (R1), the second on the right (R2), and the third on the right, respectively.
It is possible to set each sound image localization position (R3). Arpeggio sound pattern data as shown in FIG. 5 is stored in the storage device 3, and as sound image localization information S ₄ , S ₂ , and S ₁ , the sound image is localized with the strong tone side to the left. On the other hand, numerical data for localizing the sound image on the treble side to the right side is set as shown in FIG. 5 and stored in the storage device 3.
In this case, the sound image localization information of each aapeggio sound
S ₄ , S ₂ , and S ₁ are set in units of 16th notes.

In the above case, when the arpeggio tones shown in Figure 5 are produced, L3 and L are produced for the arpeggio tones of the 1st note to the 16th note, respectively.
2, L1, C (center), C, R1, R2, R
3. Each sound image localization position of R2, R1, C, C, L1, L2, and L3 is set for the scale change of the arpeggio pattern of the musical notes shown in Figure 5, and an interesting performance effect that has never been seen before can be obtained. . Furthermore, the tempo of the arpeggio changes depending on the setting state of the tempo volume, and therefore the change in sound image localization also changes following this tempo.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to control the sound image localization position of musical tones that are to be successively generated at each generation timing, so that the sound image localization position of the musical tones can be controlled in accordance with the progress of generation of a series of performance tones. As a result, a wide variety of performance effects can be produced.

Furthermore, according to the present invention, the sound image localization position of the musical tones that are to be successively produced can be freely set for each generation timing of the musical tones, so that the sound image localization position of the musical tones can be freely set, so that the sound image localization position of the musical tones can be freely set, so that the sound image localization position of the musical tones can be freely set. This has the advantage of being able to perform sound image localization control.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram of an embodiment of this invention, Figure 2 is a specific circuit diagram of a sound image localization circuit, and Figure 3 is a VCA
Fig. 4 is a diagram showing the relationship between the sound image localization position and the sound image localization information S ₄ , S ₂ , S ₁ , and Fig. 5 is a musical score example of an arpeggio pattern and the corresponding sound image. FIG. 3 is a diagram showing the relationship between localization information S ₄ , S ₂ , and S ₁ . 2...CPU, 3...Storage device, 4, 5...Musical sound generation circuit, 8, 9...Sound image localization circuit, _S4 , _S2 , _S1 ...Sound image localization information, _L1 to _L3 , C, _R1 to R ₃ ...Sound image localization position.

Claims (1)

[Scope of Claims] 1. Sound image localization information storage that stores sound image localization information for controlling the sound image localization position of each musical tone to be localized to an arbitrary position at each sound generation timing of musical tones to be continuously and sequentially generated. means for sequentially reading the sound image localization information stored in the sound image localization position information storage means, and determining the sound image localization position of each musical tone at each sound generation timing of each musical tone based on the read sound image localization information. An electronic musical instrument comprising: sound image localization control means for variably controlling sound image localization so that the image is localized to an arbitrary position; 2. A sound image localization information writing means capable of writing sound image localization information for controlling the sound image localization position of each musical tone to be localized to an arbitrary position at each sound generation timing of musical tones to be successively generated. By the writing operation by the sound image localization information writing means, the sound image localization information is stored in the sound image localization information storage means capable of storing the sound image localization information for each sound generation timing of each of the musical tones; Sound image localization control that sequentially reads sound image localization information and variably controls the sound image localization position of each musical tone to be localized to an arbitrary position at each sound generation timing of each musical tone based on the read sound image localization information. An electronic musical instrument characterized by comprising means and.