Electronic musical instrument of time-shared digital processing

Details Electronic musical instrument of time-shared digital processing Electronic musical instrument of time-shared digital processing

1979-01-04

1980-11-25

Witkowski, Stanley J.

Music

Instruments

84 124, G10H 100

Patent

active

042351421

ABSTRACT:
An electronic musical instrument is of a time-shared digital processing type and capable of producing musical tones for a special performance. There are provided, at suitable time intervals, time periods in which no key code of a depressed key is produced by a key coder. During these time periods, a signal designating a special performance is generated. In a channel assignment circuit which assigns key codes of depressed keys to plural tone production channels there is provided a channel for an exclusive use for the special performance. A circuit for assigning data for the special performance transmits the data to the channel assignment circuit in response to the special performance designation signal from the key coder so that the data selected from among the key data already assigned to the tone production channels for ordinary performance are sequentially assigned to the channel allotted exclusively for the special performance. As an example of the special performance, description is made with respect to an automatic arpeggio performance in which tones are produced at designated orders of location from the lowest tone among the tones of the depressed keys.

REFERENCES:
patent: 3842184 (1974-10-01), Kniepkamp et al.
patent: 3986423 (1976-10-01), Rossum
patent: 4031786 (1977-06-01), Kaplan
patent: 4041825 (1977-08-01), Pascetta
patent: 4054078 (1977-10-01), Kondo
patent: 4106385 (1978-08-01), Roberts
patent: 4154131 (1979-05-01), Studer et al.
patent: 4158978 (1979-06-01), Hiyoshi et al.
patent: 4184401 (1980-01-01), Hiyoshi et al.

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