Package net.paulhertz.pixelaudio.voices

Class SimpleADSR

java.lang.Object

net.paulhertz.pixelaudio.voices.SimpleADSR

public class SimpleADSR
extends Object

SimpleADSR — software envelope generator with optional exponential curves. Features: - Sample-rate–based time scaling - Per-stage exponential curvature - Sustain-level clamping - `noteOn()`, `noteOff()`, `tick()`, and `isFinished()`

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static enum	SimpleADSR.Stage

Field Summary

Fields

Modifier and Type	Field	Description
private float	attackCurve
private float	attackTime
private float	decayCurve
private float	decayTime
private float	releaseCurve
private float	releaseStart
private float	releaseTime
private float	sampleRate
private int	samplesInStage
private SimpleADSR.Stage	stage
private int	stageSamples
private float	sustainLevel
private float	value

Constructor Summary

Constructors

Constructor	Description
SimpleADSR(float attack, float decay, float sustain, float release)
SimpleADSR(float attack, float decay, float sustain, float release, float attackCurve, float decayCurve, float releaseCurve)

Method Summary

Modifier and Type	Method	Description
private static float	exponentialInterp(int step, int total, float start, float end, float curve)
float	getValue()
boolean	isFinished()
void	noteOff()
void	noteOn()
void	setCurves(float attackC, float decayC, float releaseC)
void	setSampleRate(float sr)
void	setTimes(float a, float d, float s, float r)
float	tick()

Methods inherited from class java.lang.Object

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

Field Details

attackTime

private float attackTime

decayTime

private float decayTime

sustainLevel

private float sustainLevel

releaseTime

private float releaseTime

sampleRate

private float sampleRate

attackCurve

private float attackCurve

decayCurve

private float decayCurve

releaseCurve

private float releaseCurve

stage

private SimpleADSR.Stage stage

value

private float value

releaseStart

private float releaseStart

samplesInStage

private int samplesInStage

stageSamples

private int stageSamples

Constructor Details

SimpleADSR

public SimpleADSR(float attack,
 float decay,
 float sustain,
 float release)

SimpleADSR

public SimpleADSR(float attack,
 float decay,
 float sustain,
 float release,
 float attackCurve,
 float decayCurve,
 float releaseCurve)

Method Details

setSampleRate

public void setSampleRate(float sr)

noteOn

public void noteOn()

noteOff

public void noteOff()

isFinished

public boolean isFinished()

tick

public float tick()

exponentialInterp

private static float exponentialInterp(int step,
 int total,
 float start,
 float end,
 float curve)

getValue

public float getValue()

setCurves

public void setCurves(float attackC,
 float decayC,
 float releaseC)

setTimes

public void setTimes(float a,
 float d,
 float s,
 float r)