import ddf.minim.signals.*;
import ddf.minim.*;
import ddf.minim.analysis.*;
import ddf.minim.effects.*;

int [] ebscale = new int[10];
AudioSnippet progression;
final int D = 62;
final int Eb = 63;
final int F = 65;
final int Gb = 66;
final int Ab = 68;
final int Bb = 70;
final int B = 71;
final int Db = 73;
AudioOutput out;
SawWave saw;
int counter = 0;
Minim minim = new Minim(this);

void setup()
{
  size(200, 200);
  //Minim.start(this);
  out = minim.getLineOut(Minim.STEREO, 512);
  // create a sine wave Oscillator, set to 440 Hz, at 0.5 amplitude, sample rate 44100 to match the line out
  saw = new SawWave(midiToFreq(Eb), 0.1, 44100);
  // set the portamento speed on the oscillator to 200 milliseconds
  saw.portamento(200);
  // add the oscillator to the line out
  out.addSignal(saw);

  progression = minim.loadSnippet("29833__HerbertBoland__PianoMood28.wav");
  ebscale[0] = D;
  ebscale[1] = Eb;
  ebscale[2] = F;
  ebscale[3] = Gb;
  ebscale[4] = Ab;
  ebscale[5] = Bb;
  ebscale[6] = B;
  ebscale[7] = Db;
  
  progression.cue(0);
  progression.loop();
  progression.play();
}

void keyPressed() {
  println("keypressed");
  if (key == CODED) { 
    if (keyCode == UP) {
      println("up");
      counter++;
      if (counter == 16) 
        counter = 0;
    }
    if (keyCode == DOWN) {
      println("down");
      counter--;
      if (counter == -2)
        counter = 0;
    }

    println((counter%8 + 1));
    println(ebscale[((counter%7) + 1)]);
    playNote(ebscale[((counter%7) + 1)] + (12*(counter/7)));
  }
}


void draw ()
{
  //progression.cue(0);
  //delay(progression.length()-2500);
  //progression.play();

}


public void playNote (int midiValue){
  saw.setFreq(midiToFreq(midiValue));
}

public float midiToFreq(float midi) {
  float freq = (8.1758 * pow(2,midi/12.0));
  return freq;
}

public void stop() {
  progression.close();
  out.close();
  super.stop();
}