Controlling the Volume of Playing Sampled Audio
To create a DataLine object, see ``Loading and Playing Sampled Audio'' and ``Playing Streaming Audio''. 

 
 // Set Volume
 FloatControl gainControl =
   (FloatControl)dataline.getControl(
     FloatControl.Type.MASTER_GAIN);
 double gain = .5d;    // number between 0 and 1.
 float dB = (float)(Math.log(gain)/Math.log(10.0)*20.0);
 gainControl.setValue(dB);
     
 // Mute On
 //The next three lines should all be in one line
 BooleanControl muteControl =
   (BooleanControl)dataline.getControl(
     BooleanControl.Type.MUTE);
 muteControl.setValue(true);
     
 // Mute Off
 muteControl.setValue(false);