Hi, im try to use the mixer in mimi to send sond to different output

here a small sample (a little cut up of aother sample find on the net)

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

import javax.sound.sampled.*;

Minim minim;
AudioOutput out;
MouseSaw msaw;
Mixer.Info[] mixerInfo;
Mixer.Info mi;


int m;


void setup()
{
size(512, 200);

minim = new Minim(this);

mixerInfo = AudioSystem.getMixerInfo();
for(int i = 0; i < mixerInfo.length; i++) {println (i+" "+mixerInfo[i].getName());}
m=3;
println("info mixer:"+m);
Mixer mixer = AudioSystem.getMixer(mixerInfo[m]);
mi=mixer.getMixerInfo();
println ("desc:"+mi.getDescription());
println ("name:"+mi.getName());

minim.setOutputMixer(mixer);

out = minim.getLineOut(Minim.STEREO, 2048);
msaw = new MouseSaw();  
out.addSignal(msaw);

}

void draw()
{
background(0);
}



void stop()
{
if ( out != null ) {out.close();}
minim.stop();

super.stop();
}



class MouseSaw implements AudioSignal
{
void generate(float[] samp)
{
  float range = map(mouseX, 0, width, 0, 1);
  float peaks = map(mouseY, 0, height, 1, 20);
  float inter = float(samp.length) / peaks;
  for ( int i = 0; i < samp.length; i += inter )
  {
    for ( int j = 0; j < inter && (i+j) < samp.length; j++ )
    {
      samp[i + j] = map(j, 0, inter, -range, range);
    }
  }
}

// this is a stricly mono signal
void generate(float[] left, float[] right)
{
  generate(left);
  generate(right);
}
}


i got

processing.app.debug.RunnerException: IllegalArgumentException: Line unsupported: interface SourceDataLine supporting format PCM_SIGNED 44100.0 Hz, 16 bit, stereo, 4 bytes/frame, little-endian

BUT...
if i comment out the red line all works.

Any hints?