JP2800436B2 - Electronic musical instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument, and more particularly, to an electronic musical instrument which applies a plurality of sound effects by applying a time division multiplexing technique.

[0002]

2. Description of the Related Art Recent electronic musical instruments are capable of simultaneously producing a large number of tones at the same time due to the development of time-division multiplexing technology. A single electronic musical instrument is composed of various musical sounds. Can play music. In order to finish the music played by such an electronic musical instrument as being more realistic, it is necessary to add effects such as reverberation, according to the characteristics of the tone used in the music, You have to adjust the hanging condition. For example, when a musical composition is performed in a three-system organization of a piano (attenuation-type musical sound), strings (persistent-type musical sound), and rhythm percussion instruments (a pulsive and non-pitched attenuated sound), a decay system such as a piano has a slight effect. However, the reverberation should be diluted so that its greatest characteristic, attack, is not buried in the reverberation. Also, in sustained systems such as strings, the reverberation should be relatively large to add thickness,
For percussion instruments, it is appropriate to reduce the reverberation except when aiming for a special effect for the same reason as a piano or the like.

Under such a background, as a conventional electronic musical instrument which imparts an effect such as reverberation, for example, Japanese Patent Publication No. 64-883
Japanese Patent Publication No. 8 (KOKAI) No. 8 discloses a method. This electronic musical instrument has a plurality of pitch designation means or a plurality of tone generation sequences, and is adapted to give a special reverberant sound different for each keyboard or each tone generation sequence.

[0004]

However, in the case of such a conventional electronic musical instrument, when performing a music performance while applying an effect matched to the characteristics of the musical tone, for example, when adding reverberation, the timbre is required. Since a device for imparting independent reverberation is required for each stream, there is a problem that the configuration scale of the device is inevitably increased.

The present invention has been made in view of the above circumstances, and has as its object to provide an electronic musical instrument capable of obtaining a sound effect that matches the characteristics of musical sounds with a simple configuration.

[0006]

According to the present invention, there is provided a tone signal generating means for generating a plurality of digital waveform signals by time division according to performance information, and a plurality of digital waveform signals. Distribution means for distributing into a plurality of streams, and a plurality of digitals distributed by the distribution means
Accumulating means for accumulating a waveform signal for each sequence; control tone generating means for outputting a control tone signal by controlling the characteristics of each series of the accumulation result of the accumulating means independently for each sequence. ,
And a sound effect applying means for superimposing the control tone signal for each series and applying an acoustic effect to the superimposed control tone signal.

[0007]

According to the present invention is generated in a time a plurality of digital musical tone waveform signals split according to performance information, after which these digital waveforms <br/> signal is distributed to a plurality of streams, these digital waveform signal distributed by each It is accumulated for each series. With respect to the accumulation result of each series, the characteristic is controlled independently for each series to output a control tone signal. The control tone signals for each series are superimposed, and the superimposed control A sound effect is given to the tone signal. Therefore, the degree of effect impartment such as reverberation can be appropriately adjusted according to the tendency of musical sounds (for example, timbres), and a sound effect can be obtained with a simple configuration.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration of one embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a performance information generation unit including a keyboard or the like, which generates a key code or the like in accordance with the performance of a player and outputs the key code or the like to the control unit 2. The control section 2 (distribution signal generating means) receives the performance information from the performance information generating section 1 and outputs it to the musical tone waveform generating section 3, and a signal from the setting section 4 is input to the control section 2. The musical tone waveform generating section 3 (musical tone signal generating means) generates musical tones according to the performance information, and separates the musical tones into a plurality of digital tone signals which are independent by time division, that is, eight time-division independent signals according to the time-division clock φ in this embodiment. The signals are converted to channels CH0 to CH7 (the number of simultaneous sounds is eight) and output. The setting unit 4 (control signal generating means) outputs a sound effect control signal (in this embodiment, each unit setting parameter and display) for giving a sound effect having a different characteristic for each stream to a digital tone signal of each stream described later. It is generated for each system and output to each required circuit.

The control section 2 generates a distribution designation signal SEL for distributing the musical tone signal generated by the musical tone waveform generating section 3 to a predetermined sequence among a plurality of streams, and outputs the signal to the distribution means 5. It should be noted that the distribution designation signal SEL is generated to distribute musical tone waveforms generated for each channel into a predetermined sequence in accordance with the setting of the performer and the timbre / sounding channel assignment processing in the control unit 2. The distribution means 5 includes a distribution control unit 6 and accumulators 7 to 9. The distribution control unit 6 distributes the eight time-division independent channels CH0 to CH7 generated by the musical tone waveform generating unit 3 into three streams based on the distribution designation signal SEL, and the accumulators 7 to 9 distribute the distributed independent channels CH0 to CH0. To CH7 and accumulate multiplier 1
0 to 12 (control tone generating means). Multiplier 10
-12 are sound effect control signals from the setting unit 4, that is,
In this embodiment, based on the level coefficients LVL1 to LVL3 for each sequence, the three distributed sequences are subjected to level adjustment for imparting an acoustic effect such as reverberation and output to the adder 13. The adder 13 adds the three series of signals whose levels have been adjusted, and outputs the added signal to the effect imparting unit 14. The effect imparting unit 14 adds the output of the adder 13 to the sound effect control signal from the setting unit 4. A sound effect such as reverberation is provided based on the signal and output to the adder 17 via the amplifier 16. The adder 13
The effect applying unit 14 constitutes the sound effect applying unit 15.

On the other hand, the output of the musical tone waveform generator 3 is input to the accumulator 18 and the accumulator 18
Accumulates eight time-division independent channels CH0 to CH7 and outputs the accumulated time-division independent channels CH0 to CH7 to the adder 17 after delaying the input time-division independent channels CH0 to CH7 by a predetermined time. The adder 17 (synthesizing means) adds the output of the delay unit 19 and the output of the effect imparting unit 14 input via the amplifier 16 and outputs the result. The reason for performing the delay is to match the processing timing with the signal output from the effect applying unit 14. The distribution control unit 6 operates according to the time division clock φ, and the accumulators 7 to 9 and the delay unit 19 operate according to the channel processing cycle clock φa.

Next, the operation will be described with reference to the timing chart of FIG. The time-division clock φ and the channel processing cycle clock φa are clocked at the timing shown in FIG. 2, and when the performance information generating unit 1 is operated by the player, a key code or the like is generated according to the performance of the player. Are output to the control unit 2. The tone waveform generator 3 generates a tone in accordance with the performance information, and the tone is divided into eight time-division independent channels CH0 to CH according to the time-division clock φ.
7 and output (see time division multiplexed signal WAVE)
Is done. Thereafter, the output of the musical tone waveform generator 3 is accumulated by the accumulator 18 (that is, CH0 + CH1 + C
H2 +... + CH7) and 8CH accumulated musical tone signal DRC
T, and then the signal is delayed by the delay unit 19 for a predetermined time and output to the adder 17. FIG. 2 shows the result of the accumulation rate one cycle before.

On the other hand, the time-division independent channels CH0 to CH7, which are the outputs of the tone waveform generator 3, are output to the distribution controller 6, where the eight time-division independent channels CH0 are output.
To CH7 are distributed to three streams based on the distribution designation signal SEL (which selectively designates the sequence numbers 1 to 3 as shown) and output to the accumulators 7 to 9.
One of them, WV1 '(first sequence distribution tone signal), is specifically shown, which is CH0, CH2, CH3, CH
4 is active, the others are non-active, and the signal level is [0]. In the accumulators 7 to 9, the distributed independent channels CH0 to CH7 are accumulated (the tone signal after the accumulation rate is WV1).
To WV3) are output to the multipliers 10 to 12, respectively. Next, the accumulation rate results WV1 to WV3 are converted into level coefficients LVL1 to LV
L3 is multiplied to control the level, and then output to the adder 13. The adder 13 adds the three series of signals whose levels have been controlled and outputs the result to the effect imparting unit 14. The effect imparting unit 14 outputs the sound effect control signal from the setting unit 4 to the output of the adder 13. The sound effect such as reverberation is given based on the reverberation (the reverberation sound signal is REV), and is output to the adder 17 via the amplifier 16. Next, the adder 17 adds the output of the delay unit 19 and the output of the effect imparting unit 14 input via the amplifier 16 and outputs the result.

As described above, in this embodiment, eight independent tones are generated in accordance with the time-division clock φ, distributed into three streams, the distributed tones are accumulated, and the sampling determined by the channel processing cycle clock φa. The musical tone waveform data of the period is output, weighted and output to the effect imparting unit 14, and finally synthesized with the original eight independent musical tones and output. Therefore, it is possible to appropriately adjust the tendency of the tone and the degree of imparting the effect such as reverberation for each of the three distributed sequences, and it is possible to make the degree of prominence for each tone and the sound and unity of the entire performance sound beautiful. In addition, in the present embodiment, in order to obtain the above-described effects, a reverberation imparting device or the like is not required for each stream, and time-division multiplexing processing can be performed.

Although the above embodiment has been described with reference to an example in which the number of sounds is eight and the number of sequences is three, the present invention is not limited to this, and it is needless to say that the present invention can be applied to other aspects. Further, the distribution designation signal SEL may be fixed for each channel or may be a dynamic assignment for recognizing a channel to be assigned. Further, the delay circuit 19 of the above embodiment may not be provided.

[0015]

As described above, according to the present invention, it is possible to appropriately adjust the degree of imparting effects such as timbre tendency and reverberation for each of a plurality of distributed sequences, and obtain this effect. Does not require a reverberation device for each stream,
It can be executed by time division multiplex processing. As a result, the electronic musical instrument can have a simple configuration and its configuration scale can be reduced. That is, conventionally, in order to independently add an acoustic effect to each stream, it is necessary to provide a means for imparting an acoustic effect to each stream. On the other hand, in the present invention, the characteristics of a plurality of digital waveform signals are controlled independently for each stream and then superimposed to give an acoustic effect. Thus, by providing only one acoustic effect applying means, an acoustic effect can be independently added to each stream, and the configuration is simplified.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of an embodiment of the present invention.

FIG. 2 is a timing chart of the operation of the embodiment.

[Explanation of symbols]

1: arithmetic information generating unit, 2: control unit, 3: sound waveform generating unit (tone signal generating means), 4: setting unit, 6: distribution control unit
(Distributing means), 7-9: accumulator (accumulator hand
Stage) , multipliers 10 to 12 (control tone generating means), 13:
Adder, 14: effect applying section, 15: sound effect applying means,
17: adder, 18: accumulator

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G10H 1/00

Claims (1)

(57) [Claims] 1. A musical tone signal generating means for generating a plurality of digital waveform signals by time division according to performance information; a distribution means for distributing a plurality of digital waveform signals into a plurality of streams; Accumulating means for accumulating the digital waveform signal of each series for each series, and controlling the tone generated by controlling the characteristics of each series of the accumulation result of the accumulating means independently for each series to output a control tone signal. An electronic musical instrument comprising: a control unit; and a sound effect applying unit that superimposes the control tone signal for each of the streams and applies an acoustic effect to the superposed control tone signal.