AudioTrack无法正常播放音频文件，因为它会产生噪音 [英] AudioTrack is not playing audio file properly as it is making noise instead

问题描述

我已经使用mediaplayer成功录制了用户的语音，并且文件存储在SD卡中.现在我想使用音轨播放该声音.但是，当我这样做时，它正在发出声音.是吗?

I have recorded user's voice successfully using mediaplayer and the file is stored in sd card. now i want to play that voice using audio track. But when I do it is making noise. Y so.?

这是播放声音的代码.

private void PlayAudioFileViaAudioTrack(String filePath) throws IOException
    {
    // We keep temporarily filePath globally as we have only two sample sounds now..
    if (filePath==null)
    return;

    int intSize = android.media.AudioTrack.getMinBufferSize(44100, AudioFormat.CHANNEL_CONFIGURATION_STEREO,
    AudioFormat.ENCODING_PCM_16BIT); 

    AudioTrack at = new AudioTrack(AudioManager.STREAM_MUSIC, 44100, AudioFormat.CHANNEL_CONFIGURATION_STEREO,
    AudioFormat.ENCODING_PCM_16BIT, intSize, AudioTrack.MODE_STREAM); 


    if (at==null){ 
    Log.d("TCAudio", "audio track is not initialised ");
    return; 
    }

    int count = 512 * 1024; // 512 kb
    //Reading the file..
    byte[] byteData = null; 
    File file = null; 
    file = new File(filePath);

    byteData = new byte[(int)count];
    FileInputStream in = null;
    try {
    in = new FileInputStream( file );

    } catch (FileNotFoundException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    }

    int bytesread = 0, ret = 0;
    int size = (int) file.length();
    at.play();
    while (bytesread < size) { ret = in.read( byteData,0, count); if (ret != -1) { // Write the byte array to the track 

        at.write(byteData,0, ret); bytesread += ret; } else break; } in.close(); at.stop(); at.release(); }

推荐答案

噪声可能是由于缓冲区较小所致.

Noise could be due to a small buffer.

尝试:

int intSize = android.media.AudioTrack.getMinBufferSize(44100,
AudioFormat.CHANNEL_CONFIGURATION_STEREO,
AudioFormat.ENCODING_PCM_16BIT);
init *= 2;

如果正好使用最小的缓冲区大小，则可能会产生嘈杂的声音.根据我的经验，最小尺寸的两倍是一个好习惯.

If you work with exactly the minimum buffer size, it might result in noisy sound. Having twice the minimum size is a good practice (in my experience).

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