topical media & game development

topical media & game development

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graphic-processing-site-examples-Libraries-Minim--Sound--GetSetPan-GetSetPan.pde / pde

Get Set Pan by Damien Di Fede. This sketch demonstrates how to use the <code>getPan</code> and <code>setPan</code> methods of a <code>Controller</code> object. The class used here is an <code>AudioOutput</code> but you can also get and set the pan of <code>AudioSample</code>, <code>AudioSnippet</code>, <code>AudioInput</code>, and <code>AudioPlayer</code> objects. <code>getPan</code> and <code>setPan</code> will get and set the pan of the <code>DataLine</code> that is being used for input or output, but only if that line has a pan control. A <code>DataLine</code> is a low-level JavaSound class that is used for sending audio to, or receiving audio from, the audio system. You will notice in this sketch that you will hear the pan changing (if it's available) but you will not see any difference in the waveform being drawn. The reason for this is that what you see in the output's sample buffers is what it sends to the audio system. The system makes the pan change after receiving the samples.


  
  
  import ddf.minim.*;
  import ddf.minim.signals.*;
  
  Minim minim;
  AudioOutput out;
  Oscillator  osc;
  WaveformRenderer waveform;
  
  void setup()
  {
    size(512, 200);
    
    minim = new Minim(this);
    out = minim.getLineOut();
    
    // see the example AudioOutput >> SawWaveSignal for more about this class
    osc = new SawWave(100, 0.2, out.sampleRate());
    // see the example Polyphonic >> addSignal for more about this
    out.addSignal(osc);
    
    waveform = new WaveformRenderer();
    // see the example Recordable >> addListener for more about this
    out.addListener(waveform); 
    
    textFont(createFont("Arial", 12));
  }
  
  void draw()
  {
    background(0);
    // see waveform.pde for more about this
    waveform.draw();
    
    if ( out.hasControl(Controller.PAN) )
    {
      // map the mouse position to the range of the pan
      float val = map(mouseX, 0, width, -1, 1);
      // if a pan control is not available, this will do nothing
      out.setPan(val); 
      // if a pan control is not available this will report zero
      text("The current pan is " + out.getPan() + ".", 5, 15);
    }
    else
    {
      text("The output doesn't have a pan control.", 5, 15);
    }
  }
  
  void stop()
  {
    // always close Minim audio classes when you are finished with them
    out.close();
    minim.stop();
    
    super.stop();
  }

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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