Automatic note analyzer

Details Automatic note analyzer Automatic note analyzer

1980-08-25

1982-10-19

Truhe, J. V.

Music

Accessories

Tuning devices

84DIG18, 324 78D, G10G 702

Patent

active

043544185

ABSTRACT:
An automatic note analyzer is disclosed which automatically generates and displays a note signal indicative of the musical note corresponding to an input signal. The disclosed analyzer operates to measure the period of the input signal on a regular basis. According to one aspect of the invention, the measured period is compared with a predetermined window representative of the expected value of the measured period. Measured periods which do not fall within the predetermined window are rejected. According to a second feature, measured signals representative of the period of the input signal are averaged in order to increase the stability of the analyzer. The disclosed analyzer operates in two modes: an absolute mode, and a transposer mode. In the absolute mode the displayed note value is determined with reference to an absolute pitch. In the transposer mode, the displayed note value is determined with reference to a relative pitch which can be readily adjusted as needed.

REFERENCES:
patent: 4004096 (1977-01-01), Bauer et al.
patent: 4028985 (1977-06-01), Merritt
patent: 4123704 (1978-10-01), Johnson
patent: 4151775 (1979-05-01), Merriman
patent: 4217808 (1980-08-01), Slepian et al.
patent: 4253373 (1981-03-01), Foerst
patent: 4258423 (1981-03-01), Lane et al.
patent: 4280387 (1981-07-01), Moog
patent: 4313361 (1982-02-01), Deutsch

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