Tuning device for musical instruments

Details Tuning device for musical instruments Tuning device for musical instruments

1978-11-06

1981-03-03

Hix, L. T.

Music

Accessories

Tuning devices

84DIG18, 324 79D, G10G 702

Patent

active

042533732

ABSTRACT:
A device for the measurement of the number of cycles or half-cycles of a tone by counting the cycles during a reference time which is proportional to the cycle time of the tone to be measured, comprising a store for the cycle times, a comparator, a subtraction device in which a constant value is subtracted from the counted number of tone cycles, decoders, displaying devices for the oscillation error and the polarity sign, a retriggerable mono-flop for the oscillation existence signal, a flip-flop for a wait signal, a mono-flop for a read signal and logic elements for enabling the oscillation counter and the reference pulse counter.

REFERENCES:
patent: 4122751 (1978-10-01), Calvin
patent: 4205584 (1980-06-01), Foerst

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