Music – Instruments
Patent
1976-06-18
1977-08-23
Schaefer, Robert K.
Music
Instruments
84 103, G10H 506
Patent
active
040432408
ABSTRACT:
For producing musical sounds of a pure scale, an electric instrument comprises a clock generator for producing clock pulses of a period equal to a rational multiple of a predetermined period that gives, when multiplied by integers, tones within an octave of the scale. A binary counter counts input pulses derived from the clock pulses. Keys or a memory produces binary signals corresponding to the integers in accordance with a melody. When counts in the counter reach the value of the integers, wired logic circuits clear the counter. The periods at which the counter is cleared produce the melody. In order to correct pitches of several tones, the clock pulses are controlled on deriving the input pulses therefrom either by algebraic addition of pulses or variable division of the clock pulses into groups. With this control, the instrument can produce tones of a chromatic scale within five additional tones within an octave are of a tempered scale.
REFERENCES:
patent: 3743756 (1973-07-01), Franssen et al.
patent: 3808345 (1974-04-01), Franssen
patent: 3878750 (1975-04-01), Kapps
patent: 3895554 (1975-07-01), Maillet
patent: 3962944 (1976-06-01), Sakashita
Miska Vit W.
Nippon Electric Company Ltd.
Schaefer Robert K.
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