biz.source_code.dsp.sound

Class IirFilterAudioInputStreamFisher

java.lang.Object

biz.source_code.dsp.sound.IirFilterAudioInputStreamFisher

public class IirFilterAudioInputStreamFisher
extends Object

An IIR filter for the Java Sound API.

This class provides an AudioInputStream for filtering a sound stream. It uses the Fisher method to design the IIR filter.

Method Summary

Modifier and Type	Method and Description
static AudioInputStream	getAudioInputStream(AudioInputStream in, FilterPassType filterPassType, FilterCharacteristicsType filterCharacteristicsType, int filterOrder, double ripple, double fcf1, double fcf2) Returns an AudioInputStream that supplies the filtered audio signal.

Methods inherited from class java.lang.Object

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

Method Detail

getAudioInputStream

public static AudioInputStream getAudioInputStream(AudioInputStream in,
                                                   FilterPassType filterPassType,
                                                   FilterCharacteristicsType filterCharacteristicsType,
                                                   int filterOrder,
                                                   double ripple,
                                                   double fcf1,
                                                   double fcf2)

Returns an AudioInputStream that supplies the filtered audio signal.

Parameters:

in - The input AudioInputStream.

filterPassType - The filter pass type (lowpass, highpass, bandpass or bandstop).

filterCharacteristicsType - The filter characteristics type. The following filters are implemented: Butterworth, Chebyshev (type 1), Bessel.

filterOrder - The filter order.

ripple - Passband ripple in dB. Must be negative. Only used for Chebyshev filter, ignored for other filters.

fcf1 - The filter cutoff frequency in Hz for lowpass / highpass, lower cutoff frequency in Hz for bandpass / bandstop.

fcf2 - The upper cutoff frequency in Hz for bandpass / bandstop, ignored for lowpass / highpass.