pitchschmitt.h File Reference

Pitch detection using a Schmitt trigger. More...

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Typedefs
typedef struct _aubio_pitchschmitt_t	aubio_pitchschmitt_t
	pitch detection object
Functions
smpl_t	aubio_pitchschmitt_detect (aubio_pitchschmitt_t *p, fvec_t *input)
	execute pitch detection on an input buffer
aubio_pitchschmitt_t *	new_aubio_pitchschmitt (uint_t size, uint_t samplerate)
	creation of the pitch detection object
void	del_aubio_pitchschmitt (aubio_pitchschmitt_t *p)
	deletion of the pitch detection object

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Detailed Description

Pitch detection using a Schmitt trigger.

This pitch extraction method implements a Schmitt trigger to estimate the period of a signal.

This file was derived from the tuneit project, written by Mario Lang to detect the fundamental frequency of a sound.

see http://delysid.org/tuneit.html

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Function Documentation

smpl_t aubio_pitchschmitt_detect	(	aubio_pitchschmitt_t *	p,
		fvec_t *	input
	)

execute pitch detection on an input buffer

Parameters:

p	pitch detection object as returned by new_aubio_pitchschmitt
input	input signal window (length as specified at creation time)

void del_aubio_pitchschmitt

(

aubio_pitchschmitt_t *

p

)

deletion of the pitch detection object

Parameters:

p	pitch detection object as returned by new_aubio_pitchschmitt

aubio_pitchschmitt_t* new_aubio_pitchschmitt	(	uint_t	size,
		uint_t	samplerate
	)

creation of the pitch detection object

Parameters:

size	size of the input buffer to analyse
samplerate	sampling rate of the signal