Electronic musical instrument with automatic bass accompaniment

Details Electronic musical instrument with automatic bass accompaniment Electronic musical instrument with automatic bass accompaniment

1975-08-14

1977-04-19

Weldon, Ulysses

Music

Instruments

84 101, 84 117, G10F 100

Patent

active

040181227

ABSTRACT:
Twelve flip-flops each corresponding to one of the twelve keys within an octave are provided. Each is set by depression of one corresponding key in the accompaniment manual or simultaneous depression of more than one key in the manual for playing the melody. All flip-flops are reset upon depression of a subsequent key. The q output of each flip-flop is connected to a corresponding input of reduction circuits which reduce all possible combinations of the input signals to 32 five bit words signifying 31 chords and an O signal. The 32 words are applied to tone control means which also receives signals from a bass program selector. The tone control means produces rhythmically the codes of the appropriate bass tones. Three of the five output lines of the tone control means are applied to a 3 to 6 decoder which has six output lines, a signal on each of the lines gating a corresponding tone signal to the input of a frequency reduction stage which divides the frequency of the tone signal in accordance with other outputs of the tone control means. The output of the frequency divider stage is applied to the sound reproduction system.

REFERENCES:
patent: 3526700 (1970-09-01), Ruppert
patent: 3546355 (1970-12-01), Maynard
patent: 3548066 (1970-12-01), Freeman
patent: 3688010 (1972-08-01), Freeman
patent: 3795755 (1974-03-01), Uchiyama

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