import arb.soundcipher.*;

SoundCipher sc = new SoundCipher(this);

SCScore score = new SCScore();

float beatCount = 0;

float pitch = 60;

float duration = 0.5;

float dynamic = 80;

float tempo = 140;

float beatSize = 20;

void setup() {

  noLoop();

  background(250);

  sc.instrument(sc.GUITAR);

  score.tempo(tempo);

  score.addCallbackListener(this);

  score.addCallback(0.5, 1);

  score.play(-1);

  redraw();

}

void draw() {

  if (beatCount * beatSize > width) {

    background(250);

    beatCount = 0;

  }

  stroke(255 - dynamic*2);

  line(beatCount * beatSize , height - pitch + 10, 

    beatCount * beatSize + duration * beatSize, height - pitch + 10);

  sc.playNote(pitch, dynamic, duration);

}

void handleCallbacks(int callbackID) {

  redraw();

  // compute new values

  beatCount += duration;

  if (beatCount%4 == 0 || random(10) < 2) {

    duration = 1.0;

    pitch = sc.pcRandomWalk(pitch, 5, sc.MINOR_TRIAD);

  } else  {

    duration = 0.5;

    pitch = sc.pcGaussianWalk(pitch, 3, sc.MINOR);

  }

  dynamic = cos(PI * 1 * beatCount) * 30 + 90;

  // refresh score with new values

  score.empty();

  score.addCallback(duration, 1);

  score.update();

}