Java中的音量控制（增加或减少）

Question

如何使用Java增加传出wav音频流的音量？我遇到了各种Java TTS引擎以及合成语音的输出音量问题。是否有API调用或我可以用来增加音量的doo-hickey.jar？

Answer 1

后，可以设置与MASTER_GAIN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(); 

Answer 2

可以调整使用增益控制量，尝试这样的事情你如果你使用的是Java API的声音开行

FloatControl volume= (FloatControl) line.getControl(FloatControl.Type.MASTER_GAIN); 

Answer 3

public final class VolumeControl 
{ 

    private VolumeControl(){} 

    private static LinkedList<Line> speakers = new LinkedList<Line>(); 

    private final static void findSpeakers() 
    { 
     Mixer.Info[] mixers = AudioSystem.getMixerInfo(); 

     for (Mixer.Info mixerInfo : mixers) 
     { 
      if(!mixerInfo.getName().equals("Java Sound Audio Engine")) continue; 

      Mixer mixer   = AudioSystem.getMixer(mixerInfo); 
      Line.Info[] lines = mixer.getSourceLineInfo(); 

      for (Line.Info info : lines) 
      { 

       try 
       { 
        Line line = mixer.getLine(info); 
        speakers.add(line); 

       } 
       catch (LineUnavailableException e)  { e.printStackTrace();                     } 
       catch (IllegalArgumentException iaEx) {                          } 
      } 
     } 
    } 

    static 
    { 
     findSpeakers(); 
    } 

    public static void setVolume(float level) 
    { 
     System.out.println("setting volume to "+level); 
     for(Line line : speakers) 
     { 
      try 
      { 
       line.open(); 
       FloatControl control = (FloatControl)line.getControl(FloatControl.Type.MASTER_GAIN); 
       control.setValue(limit(control,level)); 
      } 
      catch (LineUnavailableException e) { continue; } 
      catch(java.lang.IllegalArgumentException e) { continue; } 



     } 
    } 

    private static float limit(FloatControl control,float level) 
    { return Math.min(control.getMaximum(), Math.max(control.getMinimum(), level)); } 

}