Java 控制音量

import javax.sound.sampled.*;AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(    new File("some_file.wav"));Clip clip = AudioSystem.getClip();clip.open(audioInputStream);FloatControl gainControl =     (FloatControl) clip.getControl(FloatControl.Type.MASTER_GAIN);gainControl.setValue(-10.0f); // Reduce volume by 10 decibels.clip.start();

转自：http://stackoverflow.com/questions/953598/audio-volume-control-increase-or-decrease-in-java