com.softsynth.jsyn
Class Filter_1o1p
java.lang.Object
java.util.Observable
com.softsynth.jsyn.SynthObject
com.softsynth.jsyn.SynthSound
com.softsynth.jsyn.SynthUnit
com.softsynth.jsyn.SynthFilter
com.softsynth.jsyn.Filter_1o1p
public class Filter_1o1p
- extends SynthFilter
Filter_1o1p unit.
First Order, One Pole filter using the following formula:
y(n) = A0*x(n) - B1*y(n-1)
where y(n) is Output, x(n) is Input and y(n-1) is a delayed copy of the output.
This filter is a recursive IIR or Infinite Impulse Response filter.
It can be unstable depending on the values of the coefficients.
This can be useful as a low-pass filter, or a "leaky integrator".
A thorough description of the digital filter theory needed to fully describe this filter is beyond the scope of this
document.
Calculating coefficients is non-intuitive; the interested user is referred to one of the standard texts on filter theory
(e.g., Moore, "Elements of Computer Music", section 2.4).
- Version:
- JSyn Version 006
- Author:
- (C) 1997 Phil Burk, SoftSynth.com, All Rights Reserved
- See Also:
Synth
,
SynthUnit
,
Filter_1o1z
,
Filter_1o1p1z
,
Filter_2o2p
,
Filter_2o2p2z
,
Filter_StateVariable
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 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 |
A0
public SynthInput A0
- Filter coefficient. SIGNAL_TYPE_RAW_SIGNED, default = 0.6.
B1
public SynthInput B1
- Filter coefficient. SIGNAL_TYPE_RAW_SIGNED, default = 0.3.
Filter_1o1p
public Filter_1o1p(SynthContext synthContext,
int calculationRate)
throws SynthException
- Throws:
SynthException
Filter_1o1p
public Filter_1o1p(SynthContext synthContext)
throws SynthException
- Create a SynthUnit that runs at Synth.RATE_AUDIO.
- Throws:
SynthException
- If resource allocation fails.
Filter_1o1p
public Filter_1o1p()
throws SynthException
- Throws:
SynthException