Method and device for determining the primary pitch of a music s

Details Method and device for determining the primary pitch of a music s Method and device for determining the primary pitch of a music s

1995-06-07

1997-04-08

Shoop, Jr., William M.

Tools

84603, 84654, 395216, G10H 700

Patent

active

056190042

ABSTRACT:
A method and device for very quickly and accurately determining the fundamental frequency of an input analog electrical signal. The method first uses sparse range autocorrelation to determine the note which is closest to the fundamental frequency. It then uses fine range autocorrelation and interpolation to calculate more precisely the exact pitch. Smoothing is employed for both the sparse range determination and the subsequent fine range determination to reject spurious signals. Because the sparse autocorrelation produces good results with merely one or two full cycles of the fundamental frequency, the initial sparse determination can be made in less than ten milliseconds and this is updated with a fine determination less than two milliseconds later.

REFERENCES:
patent: 3947638 (1976-03-01), Blankinship
patent: 4377961 (1983-03-01), Bode
patent: 4627323 (1986-12-01), Gold
patent: 4688464 (1987-08-01), Gibson et al.
patent: 4817484 (1989-04-01), Iba et al.
patent: 4841827 (1989-06-01), Uchiyama
patent: 5140890 (1992-08-01), Elion
patent: 5210366 (1993-05-01), Sykes, Jr.
patent: 5270475 (1993-12-01), Weiss et al.
patent: 5353372 (1994-10-01), Cook et al.
patent: 5428708 (1995-06-01), Gibson et al.
Shadow Electronics of America, Inc., date uknown, SH 075 Quick Mount Guitar MIDI System brochure.
Wildcat Canyon Software, date uknown, Realtime Music Recognition Software--Autoscore brochure.
Lyrrus, Inc., 1992, G-VOX brochure, "Play with it".
Roland Corp US, 1993, GR-1 Guitar Synthesizer brochure.
Roland Corp US, 1991, GR-50 Guitar Synthesizer/GK-2 Synthesizer Driver brochure.
Roland Corp US, 1993, GR-90 Guitar Synthesizer brochure.
Roland Corp US, 1994, GI-10 MIDI Interface brochure.

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