Sound handling in (game) application

Question

As my previous question did not receive any answers, I'll try to rephrase it.
I need to change the volume of sounds during the game (changing pitch would be nice too). I tried to use:
double currentVolume, volumeGain=.01, newVolume;
FloatControl gainControl = (FloatControl)clipP1.getControl(FloatControl.Type.MASTER_GAIN);
currentVolume=Math.log(gainControl.getValue())*Math.log(10.0)/20.0;
newVolume = currentVolume + volumeGain;
gainControl.setValue((float)(Math.log(newVolume)/Math.log(10.0)*20.0));The volume increase/decrease itself worked, but it was always delayed about 0.4-1.0 seconds. That is not acceptable.
Any workarounds or do I have to use another library to achieve this?
Thank You!

Answer 1

I know little about the sound library, but I have a chunk of code that was edited from someone else. It might be faster, but I don't know. It also needs to be supported (obviously), so it may not even work (my game's sound was kind of buggy).
vol is an integer with linear scaling, I believe.
if (soundClip.isControlSupported(FloatControl.Type.VOLUME)){
    FloatControl volumeControl = (FloatControl) soundClip.getControl(FloatControl.Type.VOLUME);
    volumeControl.setValue(vol);
}