com.softsynth.jsyn
Class ExponentialLag

java.lang.Object
  java.util.Observable
      com.softsynth.jsyn.SynthObject
          com.softsynth.jsyn.SynthSound
              com.softsynth.jsyn.SynthUnit
                  com.softsynth.jsyn.ExponentialLag

public class ExponentialLag
extends SynthUnit

Output approaches Input exponentially. This unit provides a slowly changing value that approaches its Input value exponentially. The equation is:

        Output = Output + Rate*(Input - Output);

The Rate is calculated internally based on the value on the halfLife port. Rate is generally just slightly less than 1.0.

Version:

JSyn Version 005

Author:

(C) 1997 Phil Burk, SoftSynth.com, All Rights Reserved

See Also:

Synth, SynthUnit

Field Summary

SynthVariable	current Current internal value.
SynthVariable	halfLife Controls rate at which to approach input.
SynthInput	input Signal to approach.
SynthOutput	output

Constructor Summary

ExponentialLag()

ExponentialLag(SynthContext synthContext)
Create a ExponentialLag that runs at Synth.RATE_AUDIO.

ExponentialLag(SynthContext synthContext, int calculationRate)

Method Summary

Methods inherited from class com.softsynth.jsyn.SynthSound

addPort, addPort, findNamedPort, getName, getNumPorts, getPortAt, getPriority, setPriority, setStage, setStage, start, start, stop, stop

Methods inherited from class com.softsynth.jsyn.SynthObject

delete, deleteAll, enableDeletionByGarbageCollector, enableTracking, getPeer, getSynthContext, isTrackingEnabled, toString, track

Methods inherited from class java.util.Observable

addObserver, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers

Methods inherited from class java.lang.Object

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

Field Detail

input

public SynthInput input

Signal to approach. SIGNAL_TYPE_FULL_RANGE

halfLife

public SynthVariable halfLife

Controls rate at which to approach input. The output will go from its current value halfway to its input value in the time specified using this port. Note: not connectable. SIGNAL_TYPE_HALF_LIFE

current

public SynthVariable current

Current internal value. This may be tweaked to force the output to a value immediately. It can be used to generate an inexpensive decaying envelope by setting the Input to 0.0 and then setting Current to 1.0.

output

public SynthOutput output

Constructor Detail

ExponentialLag

public ExponentialLag(SynthContext synthContext,
                      int calculationRate)
               throws SynthException

Throws:

SynthException

ExponentialLag

public ExponentialLag(SynthContext synthContext)
               throws SynthException

Create a ExponentialLag that runs at Synth.RATE_AUDIO.

Throws:

SynthException - If out of memory.

ExponentialLag

public ExponentialLag()
               throws SynthException

Throws:

SynthException