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

Minim minim;

AudioOutput au_out ;

SquareWave sqw ;
LowPassSP lpass ;

float FREQ ;


void setup()
{
  size(400,600) ;
  FREQ = 1 ;
  minim = new Minim(this) ;
  au_out = minim.getLineOut() ;
  
  // create a SquareWave with a frequency of 440 Hz, 
  // an amplitude of 1 and the same sample rate as out
  sqw = new SquareWave(440, 1, 44100);
 
  // create a LowPassSP filter with a cutoff frequency of 200 Hz 
  // that expects audio with the same sample rate as out
  lpass = new LowPassSP(200, 44100);
 
  // now we can attach the square wave and the filter to our output
  au_out.addSignal(sqw);
  au_out.addEffect(lpass);
}

void stop()
{
  super.stop() ;
}

void draw() 
{
  sqw.setFreq(mouseY) ;
  
  /*
  FREQ += 2.0 ;
  if (FREQ > 800)
    FREQ = 0 ;
  sqw.setFreq(FREQ) ;
  */
}



void keyPressed()
{
  if ( key == 'm' )
  {
    if ( au_out.isMuted() )
    {
      au_out.unmute();
    }
    else
    {
      au_out.mute();
    }
  }
}