Tuning indicator for musical instruments

Details Tuning indicator for musical instruments Tuning indicator for musical instruments

1987-02-13

1988-03-22

Hix, L. T.

Music

Accessories

Tuning devices

84DIG18, G10G 702

Patent

active

047320710

ABSTRACT:
A tuning indicator is disclosed in which the octave, note within the octave, and a tuning error is displayed for a musical tone played into a microphone. A bank of digital octave filters, a bank of digital note filters, a bank of digital cent filters operate simultaneously and in parallel to analyze the fundamental frequency of the musical tone. The filters operate by computing the autocorrelation function of the input signal and then performing a Fourier transform to obtain the frequency analysis data. An efficient and simple implementation is disclosed for the computations including the analog-to-digital signal conversion, the computation of the autocorrelation function, and the Fourier transform.

REFERENCES:
patent: 4122751 (1978-10-01), Calvin
patent: 4271746 (1981-06-01), Dobbie
patent: 4313361 (1982-02-01), Deutsch
patent: 4399732 (1983-08-01), Rothschild et al.

Affiliated with

Also associated with

Rating

Tuning indicator for musical instruments does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tuning indicator for musical instruments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tuning indicator for musical instruments will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-436047