Recursive formant generator for an electronic musical instrument

Details Recursive formant generator for an electronic musical instrument Recursive formant generator for an electronic musical instrument

1981-04-02

1982-09-28

Witkowski, Stanley J.

Music

Instruments

84 122, 84DIG10, G10H 108, G10H 700

Patent

active

043512186

ABSTRACT:
A sliding formant effect is produced in a tone generator of the type in which wave shape data points are sequentially and repetitively read out of a memory at a rate corresponding to the fundamental pitch of a musical tone. The formant effect is obtained by forming the sums or differences between consecutive data points for one waveshape period and storing the new data in memory in response to a formant control signal. Provision is made for advancing or retarding the effective formant cut-off frequency under command of the formant control signal.

REFERENCES:
patent: 3913442 (1975-10-01), Deutsch
patent: 3956960 (1976-05-01), Deutsch
patent: 4084472 (1978-04-01), Niimi
patent: 4114498 (1978-09-01), Chibana et al.
patent: 4130043 (1978-12-01), Niimi
patent: 4175464 (1979-11-01), Deutsch
patent: 4192210 (1980-03-01), Deutsch
patent: 4211138 (1980-07-01), Deutsch
patent: 4267761 (1981-05-01), Deutsch
patent: 4281574 (1981-08-01), Deutsch

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