Adjust Mixers Volume (Master, Wave, Mixer, Microphone,)

The audio sytem provides special port mixers with port lines.

You have to open this lines, get the controls and adjust them.

Here is a small program which prints the current values of the controls.

It may help you to learn how to access the controls.

import javax.sound.sampled.AudioSystem;

import javax.sound.sampled.BooleanControl;

import javax.sound.sampled.CompoundControl;

import javax.sound.sampled.Control;

import javax.sound.sampled.EnumControl;

import javax.sound.sampled.FloatControl;

import javax.sound.sampled.Line;

import javax.sound.sampled.LineUnavailableException;

import javax.sound.sampled.Mixer;

import javax.sound.sampled.Port;

public class MixerTest {

public MixerTest() throws LineUnavailableException {

Mixer.Info[] mixerInfos = AudioSystem.getMixerInfo();

for (Mixer.Info mixerInfo:mixerInfos) {

Mixer m = AudioSystem.getMixer(mixerInfo);

Line.Info[] lineInfos = m.getSourceLineInfo();

for (Line.Info li:lineInfos) {

if (li instanceof Port.Info){

Port.Info pi=(Port.Info)li;

Line portLine=m.getLine(pi);

printPortControls(portLine);

}

}

lineInfos = m.getTargetLineInfo();

for (Line.Info li:lineInfos) {

if (li instanceof Port.Info){

if (li instanceof Port.Info){

Port.Info pi=(Port.Info)li;

Line portLine=m.getLine(pi);

printPortControls(portLine);

}

}

}

}

}

private void printPortControls(Line portLine) throws LineUnavailableException{

portLine.open();

Control[] pCtrls=portLine.getControls();

for(Control memberControl:pCtrls){

printControl(memberControl);

}

portLine.close();

}

public void printControl(Control memberControl) {

if (memberControl instanceof BooleanControl) {

BooleanControl bc = (BooleanControl) memberControl;

System.out.println(bc + ": " + bc.getValue());

} else if (memberControl instanceof FloatControl) {

FloatControl fc = (FloatControl) memberControl;

System.out.println(fc + ": " + fc.getValue());

} else if (memberControl instanceof EnumControl) {

EnumControl ec = (EnumControl) memberControl;

System.out.println(ec + ": " + ec.getValue());

} else if (memberControl instanceof CompoundControl) {

CompoundControl cc = (CompoundControl) memberControl;

System.out.println(cc);

for (Control compControl:cc.getMemberControls()) {

printControl(compControl);

}

}

}

/**

* @param args

*/

public static void main(String[] args) {

try {

new MixerTest();

} catch (LineUnavailableException e) {

e.printStackTrace();

}

}

}

KlausJJa at 2007-7-12 2:38:47 >