com.jsyn.unitgen

Class FilterPeakingEQ

java.lang.Object

com.jsyn.unitgen.UnitGenerator

com.jsyn.unitgen.UnitFilter

com.jsyn.unitgen.TunableFilter

com.jsyn.unitgen.FilterBiquad

com.jsyn.unitgen.FilterBiquadCommon

com.jsyn.unitgen.FilterPeakingEQ

All Implemented Interfaces:

UnitSink, UnitSource

public class FilterPeakingEQ
extends FilterBiquadCommon

PeakingEQ Filter. This can be used to raise or lower the gain around the cutoff frequency. This filter is sometimes used in the middle of a bank of EQ filters. This filter is based on the BiQuad filter. Coefficients are updated whenever the frequency or Q changes.

Author:

Phil Burk (C) 2009 Mobileer Inc

Field Summary

Fields

Modifier and Type	Field and Description
UnitInputPort	gain

Fields inherited from class com.jsyn.unitgen.FilterBiquadCommon

alpha, MINIMUM_Q, Q

Fields inherited from class com.jsyn.unitgen.FilterBiquad

a0, a1, a2, amplitude, b1, b2, cos_omega, MINIMUM_FREQUENCY, MINIMUM_GAIN, omega, previousFrequency, RATIO_MINIMUM, sin_omega

Fields inherited from class com.jsyn.unitgen.TunableFilter

frequency

Fields inherited from class com.jsyn.unitgen.UnitFilter

input, output

Fields inherited from class com.jsyn.unitgen.UnitGenerator

FALSE, PORT_NAME_AMPLITUDE, PORT_NAME_CUTOFF, PORT_NAME_FREQUENCY, PORT_NAME_FREQUENCY_SCALER, PORT_NAME_INPUT, PORT_NAME_OUTPUT, PORT_NAME_PAN, PORT_NAME_PHASE, PORT_NAME_PRESSURE, PORT_NAME_TIMBRE, PORT_NAME_TIME, synthesisEngine, TRUE, VERY_SMALL_FLOAT

Constructor Summary

Constructors

Constructor and Description
FilterPeakingEQ()

Method Summary

Modifier and Type	Method and Description
protected boolean	isRecalculationNeeded(double frequencyValue, double qValue)
void	updateCoefficients() Calculate coefficients based on the filter type, eg.

Methods inherited from class com.jsyn.unitgen.FilterBiquadCommon

computeBiquadCommon, recalculate

Methods inherited from class com.jsyn.unitgen.FilterBiquad

calculateOmega, generate, performBiquadFilter

Methods inherited from class com.jsyn.unitgen.UnitFilter

getInput, getOutput

Methods inherited from class com.jsyn.unitgen.UnitGenerator

addPort, addPort, autoStop, convertHalfLifeToMultiplier, convertTimeToRate, flattenOutputs, generate, getCircuit, getFramePeriod, getFrameRate, getId, getPortByName, getPorts, getSynthesisEngine, getSynthesizer, getTopUnit, getUnitGenerator, incrementWrapPhase, isEnabled, isStartRequired, printConnections, printConnections, printConnections, pullData, setCircuit, setEnabled, setFrameRate, setPort, setSynthesisEngine, start, start, start, stop, stop, stop

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.jsyn.unitgen.UnitSink

getUnitGenerator, start, start, stop, stop

Methods inherited from interface com.jsyn.unitgen.UnitSource

getUnitGenerator

Field Detail

gain

public UnitInputPort gain

Constructor Detail

FilterPeakingEQ

public FilterPeakingEQ()

Method Detail

isRecalculationNeeded

protected boolean isRecalculationNeeded(double frequencyValue,
                                        double qValue)

Overrides:

isRecalculationNeeded in class FilterBiquadCommon

updateCoefficients

public void updateCoefficients()

Description copied from class: FilterBiquadCommon

Calculate coefficients based on the filter type, eg. LowPass.

Specified by:

updateCoefficients in class FilterBiquadCommon