Re: Java API sound

From:
"Oliver Wong" <owong@castortech.com>
Newsgroups:
comp.lang.java.programmer
Date:
Mon, 8 Jan 2007 15:59:32 -0500
Message-ID:
<Ugyoh.26380$fg.507444@weber.videotron.net>
<boutreau.adrien@gmail.com> wrote in message
news:1168251053.443856.212310@11g2000cwr.googlegroups.com...

Hi

I'm trying to use JAva sound API but I have an error on some computers
with this code :

import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.BooleanControl;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.Line;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.Mixer;

public class ControlTest {

   public static void main(String[] args) throws
LineUnavailableException, InterruptedException {
       Mixer.Info[] mixerInfos = AudioSystem.getMixerInfo();
       for (int i = 0; i < mixerInfos.length; i++) {

           System.out.println("AudioSystem info Name
:"+mixerInfos[i].toString());
           Mixer mixer = AudioSystem.getMixer(mixerInfos[i]);

           Line.Info[] targetLineInfos = mixer.getTargetLineInfo();
           System.out.println("target infos : " +
targetLineInfos.length);
           for (int j = 0; j < targetLineInfos.length; j++) {
               setVolume(targetLineInfos[j]);
           }
       }
   }

   static boolean setVolume(Line.Info lineInfo) {
       try {
           System.out.println(lineInfo);
           Line line = AudioSystem.getLine(lineInfo);
           System.out.println("open " + line.getLineInfo());
           line.open();

           BooleanControl muteControl
=(BooleanControl)line.getControl(BooleanControl.Type.MUTE);
           System.out.println("mute " + muteControl);
           muteControl.setValue(true);
           FloatControl control =
(FloatControl)line.getControl(FloatControl.Type.VOLUME);
           control.setValue(control.getMinimum());
           System.out.println("val " + control.getValue());
           FloatControl controlp =
(FloatControl)line.getControl(FloatControl.Type.MASTER_GAIN);
           controlp.setValue(control.getMinimum());
           System.out.println("val " + controlp.getValue());
           line.close();
       } catch (Exception e) {
           System.out.println(e);
           return false;
       }
       return true;
   }
}

Error :
java.lang.IllegalArgumentException: Unsupported control type: Mute


    Can you tell us which line is throwing this exception?

    - Oliver

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