Chorus control for electronic musical instrument

Details Chorus control for electronic musical instrument Chorus control for electronic musical instrument

1976-07-09

1978-03-28

Witkowski, Stanley J.

Music

Instruments

84 125, 84DIG1, 84DIG4, 84DIG9, 84DIG10, 179 1F, 333 29, G10H 104, G10H 502

Patent

active

040808610

ABSTRACT:
In an electronic musical instrument, in particular an electronic organ, comprising a circuit for electrically modifying a musical tone by frequency modulation to provide an ensemble effect. The circuit comprises three series connected shift registers which operate as delay circuits and which are driven by three high-frequency oscillators. The oscillators are driven by three vibrato signals. The vibrato signals are out of phase with each other so that each of the clocks is driven by a differently phased signal. The outputs of the shift registers are filtered and are then recombined either electrically or acoustically or both so that a chorus effect is produced. Additionally, the output of the last shift register in the series combination may be fed back to the input of the first shift register in the series combination to introduce additional phase delay in the audio signal for richer ensemble effects.

REFERENCES:
patent: 3749837 (1973-07-01), Doughty
patent: 3833752 (1974-09-01), Van Der Kooij
patent: 3866505 (1975-02-01), Adachi
patent: 3881057 (1975-04-01), Adachi et al.
patent: 3920905 (1975-11-01), Sharp
patent: 4000676 (1977-01-01), Love

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