Audio Tools

Audio I/O (with PortAudio)
Array< SAMPLE > &	record (float NUM_SECONDS=5.0, long SAMPLE_RATE=44100)
	Record a signal from the sound card.
template<class T>
void	play (Array< T > &t, long SAMPLE_RATE=44100)
	Plays a signal on the sound card.
int	getSampleRate (char *fname)
	Reads the samplerate from a sound file.
Array< float > &	loadAudio (char *fname, int &sr)
	Reads the audio data from a WAV file.
int	writeAudio (char *fname, Array< float > &r, int sr)
	Writes an audio array into a WAV file.
Array< float > &	loadAudio (char *fname)
Array< float > &	loadAudio (string &fname, int &sr)
Array< float > &	loadAudio (string &fname)
int	writeAudio (string &fname, Array< float > &r, int sr)

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Function Documentation

int getSampleRate

(

char *

fname

)

Reads the samplerate from a sound file.

This function opens the input file and returns the data of the samplerate.

Parameters:

fname

: path of the file to open

Array<float>& loadAudio	(	char *	fname,
		int &	sr
	)

Reads the audio data from a WAV file.

This function opens the input file and returns the audio data as a 2D float Array.

Parameters:

	fname	: path of the WAV file to open
	sr	: optional parameter to read the samplerate as well

template<class T>

void play	(	Array< T > &	t,
		long	SAMPLE_RATE = 44100
	)			[inline]

Plays a signal on the sound card.

This function plays a stereo signal on the sound card.

Parameters:

	t	: 2D Array containing the left and right channels,
	SAMPLE_RATE	is given in Hertz.

Array<SAMPLE>& record	(	float	NUM_SECONDS = 5.0,
		long	SAMPLE_RATE = 44100
	)

Record a signal from the sound card.

This function records a stereo signal from the sound card, and returns it as a 2D float array.

Parameters:

	NUM_SECONDS	: duration (in seconds),
	SAMPLE_RATE	is given in Hertz.

int writeAudio	(	char *	fname,
		Array< float > &	r,
		int	sr
	)

Writes an audio array into a WAV file.

This function opens the input file and returns the audio data as a 2D float Array.

Parameters:

	fname	: path of the file to write in.
	r	: 2D float array containing the audio data to save.
	sr	: samplerate expressed in Hertz.