Stereo Spectrogram

Spectrogram.pde

// Stereo Spectrogram //
//   - gregtemp -     //
 
import ddf.minim.analysis.*;
import ddf.minim.*;
 
Minim minim;
AudioPlayer player;

FFT fftL;
FFT fftR;

int buffSize = 512;

void setup()
{
  size(1030, 580);
  frameRate(24);
  minim = new Minim(this);
  player = minim.loadFile("sound.mp3");
  
  player.play();

  fftL = new FFT(player.bufferSize(), player.sampleRate());
  fftL.window(FFT.HAMMING);
  fftR = new FFT(player.bufferSize(), player.sampleRate());
  fftR.window(FFT.HAMMING);
  
  background(0);
  strokeWeight(1);
  noFill();
}
 
void draw() {
  //fft.forward(player.mix);
  fftL.forward(player.left);
  fftR.forward(player.right);
  copy(0, 4, width, height, 0, 0, width, height);
  
  strokeWeight(1);
  for (int i = 0; i < buffSize; i++) {
    int j = 0;
    if (i > 300) {
      j = i - 300;
    }
    stroke(100 * (log(100 * fftL.getBand(i)) / log(10)) - j);
    point((width/2) + (i), height);
    
    stroke(100 * (log(100 * fftR.getBand(i)) / log(10)) - j);
    point((width/2) - (i), height);  
  }
  println(frameRate);
}
 
 
void stop()
{
  // always close Minim audio classes when you finish with them
  player.close();
  minim.stop();
  super.stop();
}