be.tarsos.dsp.resample

Class RateTransposer

java.lang.Object

be.tarsos.dsp.resample.RateTransposer

All Implemented Interfaces:

AudioProcessor

public class RateTransposer
extends java.lang.Object
implements AudioProcessor

Sample rate transposer. Changes sample rate by using interpolation Together with the time stretcher this can be used for pitch shifting.

Author:

Joren Six

Constructor Summary

Constructors

Constructor and Description
RateTransposer(double factor) Create a new sample rate transposer.

Method Summary

Modifier and Type	Method and Description
boolean	process(AudioEvent audioEvent) Process the audio event.
void	processingFinished() Notify the AudioProcessor that no more data is available and processing has finished.
void	setFactor(double tempo)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RateTransposer

public RateTransposer(double factor)

Create a new sample rate transposer. The factor determines the new sample rate. E.g. 0.5 is half the sample rate, 1.0 does not change a thing and 2.0 doubles the samplerate. If the samples are played at the original speed the pitch doubles (0.5), does not change (1.0) or halves (0.5) respectively. Playback length follows the same rules, obviously.

Parameters:

factor - Determines the new sample rate. E.g. 0.5 is half the sample rate, 1.0 does not change a thing and 2.0 doubles the sample rate. If the samples are played at the original speed the pitch doubles (0.5), does not change (1.0) or halves (0.5) respectively. Playback length follows the same rules, obviously.

Method Detail

setFactor

public void setFactor(double tempo)

process

public boolean process(AudioEvent audioEvent)

Description copied from interface: AudioProcessor

Process the audio event. Do the actual signal processing on an (optionally) overlapping buffer.

Specified by:

process in interface AudioProcessor

Parameters:

audioEvent - The audio event that contains audio data.

Returns:

False if the chain needs to stop here, true otherwise. This can be used to implement e.g. a silence detector.

processingFinished

public void processingFinished()

Description copied from interface: AudioProcessor

Notify the AudioProcessor that no more data is available and processing has finished. Can be used to deallocate resources or cleanup.

Specified by:

processingFinished in interface AudioProcessor