import ddf.minim.*;

Minim minim;
AudioSample kick;
AudioSample snare;

void setup()
{
  size(512, 200, P3D);
  minim = new Minim(this);

  kick = minim.loadSample( "BD.mp3", // filename
  512      // buffer size
  );

  if ( kick == null ) println("Didn't get kick!");

  // load SD.wav from the data folder
  snare = minim.loadSample("SD.wav", 512);
  if ( snare == null ) println("Didn't get snare!");
}

void draw()
{
  background(0, 255, 0);
  stroke(255, 0, 0);

  for (int i = 0; i < kick.bufferSize () - 1; i+=10)
  {
    float x1 = map(i, 0, kick.bufferSize(), 0, width);
    float x2 = map(i+1, 0, kick.bufferSize(), 0, width);
    ellipse(x1, 50 - kick.mix.get(i)*10, x2, 50 - kick.mix.get(i+1)*50);
    line(x1, 150 - snare.mix.get(i)*50, x2, 150 - snare.mix.get(i+1)*50);
  }
}
void keyPressed()
{
  if ( key == '3' ) {
    kick.trigger();
    snare.trigger();
  }
  if ( key == '1' ) snare.trigger();
  if ( key == '2' ) kick.trigger();
}