class SoundModule
{
  Minim m;
  AudioOutput dac;
  SineWave sine;

  SoundModule(PApplet a)
  {
    m = new Minim(a);
    dac = m.getLineOut(Minim.STEREO);
    sine = new SineWave(0, 0.5, dac.sampleRate()); 
    //it is all in the minim documentation which is quite good, but portamento means that there
    //will be no pause when changing from one frequency to another, instead there is a 200 ms slide from
    //the original tone to the new one.
    sine.portamento(200);
    dac.addSignal(sine);
  }

  void freq(float f)
  {
    //if a frequency is present, map it to a sine with Hz between 440 and 880 (and octave)
    if(f > 0)
    {
      f = map(f, 0.1, height, 440, 880); 
    }
    else{
      f = 0;
    }
    sine.setFreq(f);
  }
  //again remenber to close the connection to the soundcard
  void stop()
  {
    m.stop();
    dac.close();
  }
}