// simple mp3 mixer using the ess library plus mp3 extensions
// wait for samples to load, click to start
// jonathan fisher 22/05/05

import krister.Ess.• ;

Channel piano, ambien;
float vol;
int oldleft, oldright;

void setup() {
  size(200,100);
  Ess.start(this);
  piano=new Channel("piano.mp3" ;
  piano.normalize();
  ambien=new Channel("ambient.mp3" ;
  ambien.normalize();
}

void draw() {
  background(0);
  stroke(255);
  line(width/2,0,width/2,height);
//RIGHT HAND SAMPLE
  if(mouseX > width/2){
    line(width/2,mouseY,width,mouseY);
    line(0,oldleft,width/2,oldleft);
    vol = 1-float(mouseY)/100;
    ambien.volume(vol);
    println("vol right=" + vol);
    oldright = mouseY;
  }
  else
//LEFT HAND SAMPLE
  {
    line(0,mouseY,width/2,mouseY);
    line(width/2,oldright,width,oldright);
    vol = 1-float(mouseY)/100;
    piano.volume(vol);
    println("vol left=" + vol);
    oldleft=mouseY;
  }
}

void mousePressed() {
  if (piano.state==Ess.PLAYING && ambien.state==Ess.PLAYING) {
    piano.stop();
    ambien.stop();
  } 
  else {
    piano.play(Ess.FOREVER);
    ambien.play(Ess.FOREVER);
  }
}

// clean up before exiting
public void stop() {
  Ess.stop();
  super.stop();
}