Java中的音量控制（增加或减少）

如何使用Java增加传出wav音频流的音量？ 我遇到了各种Java TTS引擎和合成语音输出量的问题。 是否有API调用或doo-hickey.jar我可以用来提高音量？

Answer 1

如果您使用的是Java Sound API，则可以使用MASTER_GAIN控件设置音量。

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

您可以使用GainControl调整音量，打开线后尝试这样的操作

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

Answer 3

 public final class VolumeControl { private VolumeControl(){} private static LinkedList speakers = new LinkedList(); 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)); } }