Implementation of delayed vibrato in a computor organ

Details Implementation of delayed vibrato in a computor organ Implementation of delayed vibrato in a computor organ

1974-09-26

1976-04-20

Hix, L. T.

Music

Instruments

235152, 235197, G10H 104, G10H 500

Patent

active

039510301

ABSTRACT:
Delayed vibrato is implemented in an electronic musical instrument of the type wherein the fundamental frequency of the generated tone is proportional to a frequency number R supplied to the instrument. At the beginning of note production, the frequency number R itself is supplied to the instrument for a preselected delay time, so that no vibrato is introduced during this initial delay time. Subsequently a periodically varying fractional frequency number R.sub.v is added to the frequency number R and the sum supplied to the instrument. This causes the generated tone to exhibit vibrato at a rate corresponding to the periodicity of the value R.sub.v. The depth of vibrato is established by the maximum value of R.sub.v and may be varied by scaling R.sub.v. Advantageously such scaling is done when the vibrato begins, so that the vibrato depth will increase gradually to the maximum value.

REFERENCES:
patent: 3515792 (1970-06-01), Deutsch
patent: 3681531 (1972-08-01), Burkhard et al.
patent: 3749837 (1973-07-01), Doughty
patent: 3757022 (1973-09-01), Markowitz
patent: 3809786 (1974-05-01), Deutsch
patent: 3809788 (1974-05-01), Deutsch
patent: 3809789 (1974-05-01), Deutsch
patent: 3809790 (1974-05-01), Deutsch
patent: 3816637 (1974-06-01), Whitefield
patent: 3831015 (1974-08-01), Hoff, Jr.
patent: 3882751 (1975-05-01), Tomisawa et al.

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