pitchyin.h File Reference

Pitch detection using the YIN algorithm. More...

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Functions
void	aubio_pitchyin_diff (fvec_t *input, fvec_t *yinbuf)
	compute difference function
void	aubio_pitchyin_getcum (fvec_t *yinbuf)
	in place computation of the YIN cumulative normalised function
uint_t	aubio_pitchyin_getpitch (fvec_t *yinbuf)
	detect pitch in a YIN function
smpl_t	aubio_pitchyin_getpitchfast (fvec_t *input, fvec_t *yinbuf, smpl_t tol)
	fast implementation of the YIN algorithm

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Detailed Description

Pitch detection using the YIN algorithm.

This algorithm was developped by A. de Cheveigne and H. Kawahara and published in:

De Cheveigné, A., Kawahara, H. (2002) "YIN, a fundamental frequency estimator for speech and music", J. Acoust. Soc. Am. 111, 1917-1930.

see http://recherche.ircam.fr/equipes/pcm/pub/people/cheveign.html

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Function Documentation

void aubio_pitchyin_diff	(	fvec_t *	input,
		fvec_t *	yinbuf
	)

compute difference function

Parameters:

	input	input signal
	yinbuf	output buffer to store difference function (half shorter than input)

void aubio_pitchyin_getcum

(

fvec_t *

yinbuf

)

in place computation of the YIN cumulative normalised function

Parameters:

yinbuf

input signal (a square difference function), also used to store function

uint_t aubio_pitchyin_getpitch

(

fvec_t *

yinbuf

)

detect pitch in a YIN function

Parameters:

yinbuf

input buffer as computed by aubio_pitchyin_getcum

smpl_t aubio_pitchyin_getpitchfast	(	fvec_t *	input,
		fvec_t *	yinbuf,
		smpl_t	tol
	)

fast implementation of the YIN algorithm

Parameters:

	input	input signal
	yinbuf	input buffer used to compute the YIN function
	tol	tolerance parameter for minima selection [default 0.15]

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