Tone generation device capable of varying delay time length at t

Details Tone generation device capable of varying delay time length at t Tone generation device capable of varying delay time length at t

1992-12-03

1994-09-13

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

84622, 84626, G10H 1053, G10H 106, G10H 704

Patent

active

053470877

ABSTRACT:
In a waveform memory, data representing a silent state, e.g., zero value data, is stored in a predetermined first address area and waveform data is stored in a second address area. In response to designation of tone generation, the data representing a silent state is read from a desired number of address locations and, thereafter, tone waveform data is read from a second address area. By this control, time during which the data representing a silent state is read out, i.e., delay time, is determined by the number of address locations and, therefore, absolute time of the delay time is not constant but corresponds to an amount progress of the address signal, i.e., its phase amount. Accordingly, phase relation in a key-on delay can be made independent from tone pitch. For realizing an ensemble effect, the above control is performed in at least two channels in such a manner that, in a first channel, tone waveform data is immediately read out in response to the designation of start of tone generation whereas, in a second channel, the number of address locations for reading out the data representing a silent state is set to a number other than zero thereby is delayed from the designation of start of tone generation.

REFERENCES:
patent: 4562763 (1986-01-01), Kaneko

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