micromod
Class Compressor

java.lang.Object
  micromod.WaveShaper
      micromod.Compressor

public class Compressor

extends WaveShaper

Compressor is an implementation of WaveShaper that utilises an efficient algorithm I found on www.smartelectronix.com/musicdsp A compressor improves the sound of distortion and so allows you to crank up the gain without things sounding too horrible. This algorithm will work with input amplitudes up to 8x the output. The use of 32 bit arithmetic has meant that the input must be quantized to 13 bits. The distortion produced by the compressor is probably louder than the quantization noise anyway.

Constructor Summary

Compressor()

Method Summary

protected static int	abs(int x)
protected static int	sgn(int x)
void	shapeWaves(int[] inputBuffer, short[] outputBuffer, int length) Perform shaping of the samples in inputBuffer to outputBuffer from 0 to length-1.

Methods inherited from class java.lang.Object

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

Constructor Detail

Compressor

public Compressor()

Method Detail

shapeWaves

public void shapeWaves(int[] inputBuffer,
                       short[] outputBuffer,
                       int length)

Description copied from class: WaveShaper

Perform shaping of the samples in inputBuffer to outputBuffer from 0 to length-1.

Overrides:

shapeWaves in class WaveShaper

sgn

protected static int sgn(int x)

Returns:

-1 if x negative, 1 if zero or positive

abs

protected static int abs(int x)

Returns:

the magnitude of x