unlekker.util
Class FFTHelper
java.lang.Object
unlekker.util.FFTHelper
public class FFTHelper
- extends java.lang.Object
Utility class to normalize and dampen results from FFT analysis, giving a more reliable output.
Essentially functions as a peak follower.
Use setDamper() to adjust damping factor, call update() with an array containing your FFT results.
- Author:
- Marius Watz
Constructor Summary |
FFTHelper(int _n,
int _nbands,
boolean _doDelta)
|
Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
num
public int num
numbands
public int numbands
spectrum
public float[] spectrum
spectrumD
public float[] spectrumD
spectrumLast
public float[] spectrumLast
ttv
public float[] ttv
v
public double[] v
dampUp
public double dampUp
dampDown
public double dampDown
masterVol
public double masterVol
maxinternal
public double maxinternal
max
public float max
maxMinimum
public float maxMinimum
maxMaximum
public float maxMaximum
band
public float[] band
bandmax
public float[] bandmax
bandsteps
public int bandsteps
FFTHelper
public FFTHelper(int _n,
int _nbands,
boolean _doDelta)
setMaxLimits
public void setMaxLimits(float _min,
float _max)
setDamper
public void setDamper(double _dup,
double _ddown)
setDamper
public void setDamper(double _d)
setVolume
public void setVolume(double _vol)
dampenVal
public float dampenVal(double oldval,
double newval)
update
public void update(float[] nv)
update
public void update(float[] nv,
int start,
int length)
updateBands
public void updateBands(float[] nv,
int div)
checkBandMax
public double checkBandMax(int valid)