pitchyinfft.h File Reference

Pitch detection using a spectral implementation of the YIN algorithm. More...

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Typedefs
typedef _aubio_pitchyinfft_t	aubio_pitchyinfft_t
	pitch detection object
Functions
smpl_t	aubio_pitchyinfft_detect (aubio_pitchyinfft_t *p, fvec_t *input, smpl_t tol)
	execute pitch detection on an input buffer
aubio_pitchyinfft_t *	new_aubio_pitchyinfft (uint_t bufsize)
	creation of the pitch detection object
void	del_aubio_pitchyinfft (aubio_pitchyinfft_t *p)
	deletion of the pitch detection object

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Detailed Description

Pitch detection using a spectral implementation of the YIN algorithm.

This algorithm was derived from the YIN algorithm (see pitchyin.c). In this implementation, a Fourier transform is used to compute a tapered square difference function, which allows spectral weighting. Because the difference function is tapered, the selection of the period is simplified.

Paul Brossier, ``Automatic annotation of musical audio for interactive systems'', Chapter 3, Pitch Analysis, PhD thesis, Centre for Digital music, Queen Mary University of London, London, UK, 2006.

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Function Documentation

smpl_t aubio_pitchyinfft_detect	(	aubio_pitchyinfft_t *	p,
		fvec_t *	input,
		smpl_t	tol
	)

execute pitch detection on an input buffer

Parameters:

	p	pitch detection object as returned by new_aubio_pitchyinfft
	input	input signal window (length as specified at creation time)
	tol	tolerance parameter for minima selection [default 0.85]

void del_aubio_pitchyinfft

(

aubio_pitchyinfft_t *

p

)

deletion of the pitch detection object

Parameters:

p

pitch detection object as returned by new_aubio_pitchyinfft()

aubio_pitchyinfft_t* new_aubio_pitchyinfft

(

uint_t

bufsize

)

creation of the pitch detection object

Parameters:

bufsize

size of the input buffer to analyse

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