org.openimaj.audio.util

Class AudioUtils

java.lang.Object

org.openimaj.audio.util.AudioUtils

public class AudioUtils
extends Object

Various static methods for dealing with audio information and data.

Author:

David Dupplaw (dpd@ecs.soton.ac.uk)

Created:

26 Nov 2011

Constructor Summary

Constructors

Constructor and Description
AudioUtils()

Method Summary

Modifier and Type	Method and Description
static double	frequencyToBarkFrequency(double freq) Converts a frequency to a Bark frequency
static double	frequencyToMelFrequency(double freq) Converts a frequency to an approximation of a Mel frequency.
static SourceDataLine	getAnyJavaOutputLine(AudioFormat af) Gets a Java output line (SourceDataLine) that can play something with the given audio format.
static List<AudioDevice>	getDevices() Returns a list of devices that are available on this system.
static SourceDataLine	getJavaOutputLine(String deviceName, AudioFormat af) Returns a Java sound line for the given device name.
static void	main(String[] args)
static double	melFrequencyToFrequency(double melFreq) Converts a Mel frequency back into an approximation of a frequency.

Methods inherited from class java.lang.Object

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

Constructor Detail

AudioUtils

public AudioUtils()

Method Detail

getDevices

public static List<AudioDevice> getDevices()

Returns a list of devices that are available on this system.

Returns:

The list of devices available on this system.

getJavaOutputLine

public static SourceDataLine getJavaOutputLine(String deviceName,
                                               AudioFormat af)
                                        throws LineUnavailableException

Returns a Java sound line for the given device name. Use AudioDevice.deviceName as input to this method. Use getDevices() to get an AudioDevice object.

Parameters:

deviceName - The device name.

af - The format

Returns:

A Java sound line.

Throws:

LineUnavailableException

getAnyJavaOutputLine

public static SourceDataLine getAnyJavaOutputLine(AudioFormat af)
                                           throws LineUnavailableException

Gets a Java output line (SourceDataLine) that can play something with the given audio format.

Parameters:

af - The audio format.

Returns:

A SourceDataLine

Throws:

LineUnavailableException

frequencyToMelFrequency

public static double frequencyToMelFrequency(double freq)

Converts a frequency to an approximation of a Mel frequency. This formula gives a close approximation for frequencies less than 1000Hz.

Parameters:

freq - The frequency to convert

Returns:

The Mel frequency

melFrequencyToFrequency

public static double melFrequencyToFrequency(double melFreq)

Converts a Mel frequency back into an approximation of a frequency.

Parameters:

melFreq - The Mel frequency to convert

Returns:

The frequency

frequencyToBarkFrequency

public static double frequencyToBarkFrequency(double freq)

Converts a frequency to a Bark frequency

Parameters:

freq - The frequency to convert

Returns:

The Bark frequency

main

public static void main(String[] args)

Parameters:

args -