Automatic bass chord system

Details Automatic bass chord system Automatic bass chord system

1976-09-02

1979-03-06

Weldon, Ulysses

Music

Instruments

84 101, 84 117, 84 124, 84DIG22, G10F 100

Patent

active

041424336

ABSTRACT:
In order to simplify the intricate wiring in known automatic bass chord systems and to reduce the number of separate decoders used therein for all chords of each key, an apparatus is provided which allows the use of only one decoder per chord type. When a chord is held one bit is applied to the inputs of a first 12-bit shaft register which correspond to the tones of the chord, after which all bits are shifted further by an HF clock pulse until this chord pattern has arrived at those outputs of the 12-bit shift register which, with the inputs of the decoder which corresponds to the chord being held, are assigned to a single pre-selected tonality.

REFERENCES:
patent: 3697661 (1972-10-01), Deutsch
patent: 3871247 (1975-03-01), Bonham
patent: 3986424 (1976-10-01), Sakashita
patent: 3990339 (1976-11-01), Robinson et al.
patent: 4011784 (1977-03-01), Fukui

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