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我稱之爲「new.wav」一個wav文件,我想通過的MediaPlayer和AudioTrack android中發揮它:的MediaPlayer和AudioTrack不輸出相同的聲音
String baseDir = Environment.getExternalStorageDirectory().getAbsolutePath();
String fileName = "new.wav";
File f = new File(baseDir + File.separator + fileName);
byte[] b = null;
try {
b=this.readFile(f);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Log.i("123"," "+"length is "+b.length);
truncated=new byte[b.length-44];
truncated=Arrays.copyOf(b, b.length-44);
at=new AudioTrack(AudioManager.STREAM_MUSIC, 48000, AudioFormat.CHANNEL_OUT_MONO,
AudioFormat.ENCODING_PCM_16BIT, truncated.length /* 1 second buffer */,
AudioTrack.MODE_STREAM);
at.write(truncated, 0, truncated.length);
at.play();
mp = new MediaPlayer();
try {
mp.setDataSource(baseDir + File.separator + fileName);
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
mp.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
嘗試過這兩種方法後,我發現他們的聲音不一樣,AudioTrack沒有在wav文件中輸出原始聲音。我認爲我的採樣率很好,有人可以幫我解決這個問題嗎?謝謝!
我認爲audiotrack播放頻率較低。 BTW – 2013-04-20 18:55:31
看起來像是如果我將選項更改爲AudioFormat.CHANNEL_OUT_STEREO,它會產生相同的輸出。不知道爲什麼 – 2013-04-20 19:10:59