Digital audio signal processor

Details Digital audio signal processor Digital audio signal processor

1988-09-20

1991-12-10

Hix, L. T.

Music

Accessories

Tuning devices

324 79D, 364484, G04F 502

Patent

active

050707540

ABSTRACT:
A digital signal processing apparatus is provided for identifying the octave, note and cent of a musical sound. The apparatus includes a transducer for converting the musical sound into an electrical signal, a digital detection unit, receiving the electrical signal from the transducer, for determining the octave, note and cent of the material sound by detecting a fundamental frequency of the electrical signal; and a display unit, responsive to the detection unit, for displaying the note as an alphanumeric character and the cent as a positive or negative decimal integral number from -49 to +50 with zero cents representing perfect concert pitch.

REFERENCES:
patent: 3144802 (1964-08-01), Faber, Jr. et al.
patent: 4429609 (1984-02-01), Warrender
patent: 4434697 (1984-03-01), Roses
patent: 4457203 (1984-07-01), Schoenberg et al.
patent: 4523506 (1985-06-01), Hollimon

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