JPS6255159B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an effect generation method in an electronic musical instrument that has both a vibrato effect and a glide effect, and eliminates unnaturalness caused by discontinuity from the glide effect's action section to the vibrato effect. be.

Conventionally, when adding these effects to an electronic instrument that has both vibrato and glide effects,
When both the vibrato modulation data in Fig. 1a and the glide modulation data in Fig. 1a operate simultaneously as shown in Fig. 1b, frequency modulation is performed using the signal obtained by adding them together, or as shown in Fig. 1c. A method has been adopted in which the vibrato effect is blocked and the glide effect is executed.

In the latter case, the problem was that the transition from the glide effect to the vibrato effect felt unnatural.

An object of the present invention is to provide an effect generation method in an electronic musical instrument that eliminates unnaturalness caused by discontinuity from the glide effect section to the vibrato effect.

In order to achieve the above object, the effect generation method in the electronic musical instrument of the present invention includes a glide data generator, a vibrato data generator, and a data selector, and the data selector controls the output of the glide data generator during the glide effect operation period. In an effect generation method for an electronic musical instrument in which the output of a vibrato data generator is selected outside the effect period, a signal indicating the effect period of the glide effect is sent to the vibrato data generator, and from the end of the effect period. The present invention is characterized in that means is provided for starting the delayed vibrato from a waveform in the middle of its growth section.

The present invention will be described in detail below with reference to examples.

FIG. 1e is an explanatory diagram of waveforms of the present invention in comparison with conventional diagrams b and c of the same diagram. When entering the glide effect, the vibrato effect is simply blocked as in Figure c, but at the end of the glide effect, delayed vibrato is started in the middle of the vibrato growth section, allowing a natural transition from the glide effect to the vibrato effect. This is what I did. Of the vibrato growth section shown as _td in Figure d, the section t'd is omitted.
If this t″d is not omitted, the transition from the glide effect to the vibrato effect will feel dull.

Such processing of the present invention is compatible with the playing style of natural instruments such as trombones and violins in which the vibrato gradually develops after the portamento. Since the present invention utilizes the delayed vibrato effect that is widely used in electronic musical instruments, there is no need to provide a new circuit and the cost is low.

FIG. 2 is an explanatory diagram showing the configuration of an embodiment of the present invention.

In the figure, a vibrato data generator 100
vibrato modulation data R is outputted according to the vibrato switch information input to line L1.
(t) has occurred. The delayed vibrato starts with a positive pulse signal sent from the key assigner 140 to line L2 as a key press signal (a positive pulse signal is generated when a key is pressed). In this case, the L2 input of the vibrato data generator 100,
The relationship of R(t) is shown in FIGS. 3a and 3b. When the vibrato is on, the waveform shown in Figure 1a is shown,
When a positive pulse signal on line L2 in FIG. 3a is applied, a waveform R(t) in FIG. 3b is obtained. A fourth embodiment of this vibrato data generator 100 is described below.
As shown in the figure. The required modulation data is 64 words from R1
It is stored in the memory 101 equally divided into R8 as shown in the figure. The decoder 102 has a counter 103,
The output of the programmable counter 104 is decoded and data is read from the memory 101. Among the outputs of the programmable counter 104, Q ₁ to _{Q 3} are
Specify R1 to R8 and output Q ₁ to _{Q 3} of counter 103
specifies each word.

If Q of flip-flop 107 is “1”
Due to the action of the OR circuit group 105, the contents of R8 are read out regardless of the output of the programmable counter 104. By associating R1 to R8 with vibrato growth section data and R8 with vibrato data, vibrato data will be read out.
The vibrato switch information on line L1 controls the gate 106 to convert the read data to R(t).
Controls whether to send it as

When the power is turned on, counter 103 counts the output of clock generator 108.

Programmable counter 104 is counter 10
_Q3 of 3 is counted through the OR circuit 109.
At the rising edge of _Q4 of programmable counter 104, flip-flop 107 is set and vibrato data is read out according to the output of clock generator 108. This means that the initial state is set, and when the vibrato is on, the gate 106 is turned on and the vibrato data is directly sent to R(t). When a positive pulse signal is sent to line L2, counter 103 and programmable counter 104 are reset via OR circuit 110, and flip-flop 107 is reset at the rising edge. The line L2 returns to "0" and the counter 103 and programmable counter 104 become ready for counting.As the counting operation progresses, R1, R2, etc. are read out, and when the reading of R8 is completed, _Q4 of the programmable counter 104 is read out. When the signal changes from "0" to "1", the flip-flop 107 is set at the rising edge, and thereafter R8 is repeatedly read out to execute delayed vibrato.

By the way, glide modulation data R'(t') is generated at the output of the glide data generator 120 in accordance with the glide switch information on the input line L3. L4
The output is an action section signal indicating the section on which the glide is acting. The relationships among R'(t'), L3 input, and L4 output of the glide data generator 120 in this case are shown in FIGS. 5a to 5c. In the data selector 130, when the L4 output is "0" and R'(t') is "0", R
(t), and when L4 output is “1”, R′(t′) is L
Send as 5 output. In FIG. 4, when L4 is "0", both OR circuits 109 and 110 operate so that a normal delayed vibrato can be started. Now when line L4 becomes “1”
The counter 103 is reset via the OR circuit 110. On the other hand, the programmable counter 104 is placed in a loaded state via the NOT circuit group 111.
When L4 becomes "0", _J1 is applied to Q1 to Q4 of the programmable counter 104, which maintains the loaded state due to the delay of the NOT circuit group 111, at _the falling edge of _L4 input through the OR circuit 109.
~J Set the value of ₄ .

When the line L4 changes from "1" to "0", that is, when the glide effect shifts to the vibrato effect, the reset of the counter 103 is also canceled and delayed vibrato starts, but the programmable counter 104 has already recorded J ₁ to J ₄ value J ₁ J ₂ J ₃ J ₄ /0100 is set, so R3
We recommend reading and counting operations for the growth section. Therefore, the delayed vibrato that starts when the glide effect shifts to the vibrato effect has a shorter growth time than usual and is not accompanied by a feeling of sluggishness.

Therefore, the present invention can be realized by realizing the modulation effect based on the modulation data generated as the L5 output.
If frequency modulation data output R(t), R'(t')
If is an analog format signal, data selector 1
30 also uses an analog format. The oscillation frequency of the master oscillator of the top octave synthesizer is changed by voltage control using the L5 output.

On the other hand, frequency modulation data output R(t),
If R'(t') is a digital format signal, the data selector 130 also uses a digital format.

In the example, the growth period is shortened to 3/4, but
This is for ease of explanation and is not intended to limit the invention. It is obvious that if a programmable counter is used for the counter 103, reading can be started from any address in the memory 101.

As explained above, according to the present invention, the vibrato effect is stopped in the section where the glide effect is acting, and the delayed vibrato is started halfway from the end of the section to make the growth time shorter than usual.
This is designed to quickly restore the vibrato effect. This completely eliminates the unnatural transition from glide effect to vibrato effect.

[Brief explanation of the drawing]

Figures 1 a to e are waveform diagrams comparing the conventional example and the present invention, Figure 2 is an explanatory diagram showing the configuration of the embodiment of the present invention, Figures 3 a and b, and Figures 5 a to 5. c is a waveform diagram showing the operation of the main part of the embodiment of FIG. 2, and FIG. 4 is a detailed explanatory diagram of the main part of the embodiment of FIG.
100 is a vibrato data generator, 101 is a memory, 102 is a decoder, 103 is a counter, 10
4 is a programmable counter, 105 is an OR circuit group, 106 is a gate, 107 is a flip-flop, 108 is a clock generator, 109 and 110 are
OR circuit, 111 is NOT circuit group, 120 is glide data generator, 130 is data selector, 14
0 indicates a key assigner.

Claims (1)

[Claims] 1. A glide data generator, a vibrato data generator, and a data selector are provided, and the data selector selects the output of the glide data generator during the glide effect's action period, and selects the output of the vibrato data generator outside the action period. In an effect generation method for an electronic musical instrument, a signal indicating an action section of the glide effect is sent to the vibrato data generator, and delayed vibrato is started from a waveform in the middle of the growing section from the end of the action section. An effect generation method in an electronic musical instrument characterized by providing a means.