FFT_Testing.java

import ddf.minim.*;
import ddf.minim.analysis.*;

Minim minim;
AudioInput in;
FFT fft;
int highest=0;

void setup()
{
  size(300, 200, P2D);
  if (frame != null)
    frame.setResizable(true);
  
  minim = new Minim(this);
  minim.debugOn();

  //in = minim.getLineIn(Minim.MONO, 4096, 44100);
  in = minim.getLineIn(Minim.MONO, 2048, 44100);
  fft = new FFT(in.mix.size(), 44100);
}

void draw()
{
  background(0, 0, 0);
  stroke(100, 0, 0);

  fft.forward(in.mix);
  highest=0;
  for (int n = 0; n < fft.specSize(); n++) {
    // draw the line for frequency band n, scaling it by 4 so we can see it a bit better
    line(n/4, height, n/4, height - (fft.getBand(n)/log(n)));

    //find frequency with highest amplitude
    if (fft.getBand(n)>fft.getBand(highest))
      highest=n;
  }
  //println(highest);

  //println(fft.getFreq(110));
  // draw the waveforms
  /*for (int i = 0; i < in.bufferSize() - 1; i++)
  {
    line(i, 50 + in.left.get(i)*50, i+1, 50 + in.left.get(i+1)*50);
    line(i, 150 + in.right.get(i)*50, i+1, 150 + in.right.get(i+1)*50);
  }*/
}


void stop()
{
  // always close Minim audio classes when you are done with them
  in.close();
  minim.stop();

  super.stop();
}