Electronic chorus and tremulant system

Details Electronic chorus and tremulant system Electronic chorus and tremulant system

1975-01-22

1977-08-23

Weldon, Ulysses

Music

Instruments

84 124, 84DIG4, G10H 104

Patent

active

040432432

ABSTRACT:
This invention relates to a electronic chorus and tremulant system for an electrical musical instrument such as an electronic piano or an electronic organ. A plurality of different sub groups of tone signals representing musical notes are separately collected from a conventional tone generating system. A bucket brigade delay line vibrato system is incorporated in each of a plurality of transmission channels each having a loudspeaker at its output. The instantaneous pitch of the signals in each channel is cyclically varied by varying the time delay introduced by its bucket brigade delay line. The instantaneous pitch in each channel is caused to be different from the instantaneous pitch of every other channel so that a multiple voice chorus effect is produced. Unlike prior systems of this general type, each transmission channel is not fed identical signal information but is fed matrixed signal information wherein different sub groups of tone signals are combined with other sub groups of tone signals in a plurality of different phase relationships, and a differently matrixed signal is fed to each transmission channel.

REFERENCES:
patent: 2835814 (1958-05-01), Dorf
patent: 2869669 (1959-01-01), Leslie
patent: 3004460 (1961-10-01), Wayne
patent: 3069958 (1962-12-01), Arsem et al.
patent: 3083606 (1963-04-01), Bonham
patent: 3146292 (1964-08-01), Bonham
patent: 3160695 (1964-12-01), Bonham
patent: 3215767 (1965-11-01), Martin
patent: 3229019 (1966-01-01), Peterson
patent: 3336432 (1967-08-01), Hurvitz
patent: 3886835 (1975-06-01), Peterson

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