Music – Accessories – Tuning devices
Patent
1976-02-17
1977-06-14
Weldon, Ulysses
Music
Accessories
Tuning devices
84464, 324 78R, G10G 702
Patent
active
040289850
ABSTRACT:
An improved system for the determination of pitch or perceived frequency of signals generated by musical instruments or voices and for the display of the results in a format easily understood and used by musicians. An incoming signal from a microphone is peak detected after amplification, then further processed by rejecting spurious peaks through the use of an inhibit circuit which sends onward acceptable pulses and inhibits those pulses which arrive during a period immediately following each accepted pulse, the period being approximately 3/8 of the time between acceptable pulses. These pulses drive a period measuring circuit which provides a signal proportional to the time between input pulses, the signal being fed back to the inhibit circuit for its proper operation and being fed forward to the readout display where the results are translated into convenient musical notation, like C.sub.+.sub.1 .music-sharp.. The display further subdivides the standard 6% musical pitch increments in 2% increments so that slightly sharp or flat indications can be provided for the use of the musician.
REFERENCES:
patent: 2779920 (1957-01-01), Petroff
patent: 3204513 (1965-09-01), Balamuth
patent: 3662261 (1972-05-01), Barthold et al.
Doble Arthur V.
Weldon Ulysses
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