Question

我正在尝试使用AudioRecord类和写入来录制语音使用AudioTrack类读取扬声器的字节数。我能听到来自扬声器的声音但声音非常低而且很多噪音随着录制的声音而出现。

任何可以解决此问题的解决方案，以减少噪音和响亮实际的声音。

我正在使用以下代码：

    package com.my.mic.record;

    import android.media.AudioFormat;
    import android.media.AudioManager;
    import android.media.AudioRecord;
    import android.media.AudioTrack;
    import android.media.MediaRecorder;
    import android.util.Log;

    public class Record extends Thread
    {

           int numCrossing,p,numSamples,af;

           static final int bufferSize = 200000;
           short[] buffer = new short[bufferSize];
           short[] readBuffer = new short[bufferSize];
           boolean isRecording;
           AudioManager am;

           public AudioRecord arec;
           public AudioTrack atrack;

           private int sampleRate = 8000;


           public void run() {


                   isRecording = true;

    android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);

                   int buffersize =
    AudioRecord.getMinBufferSize(sampleRate,AudioFormat.CHANNEL_CONFIGURATION_MONO,
    AudioFormat.ENCODING_PCM_16BIT);

                   arec = new
    AudioRecord(MediaRecorder.AudioSource.MIC,sampleRate,AudioFormat.CHANNEL_CONFIGURATION_MONO,AudioFormat.ENCODING_PCM_16BIT,
                                   buffersize);

                   //buffersize = arec.getMinBufferSize(arec.getSampleRate(),
    arec.getChannelConfiguration(), arec.getAudioFormat());

                   atrack = new
    AudioTrack(AudioManager.STREAM_MUSIC,arec.getSampleRate(),arec.getChannelConfiguration(),arec.getAudioFormat(),
                                   buffersize,AudioTrack.MODE_STREAM);

                   am.setRouting(AudioManager.MODE_NORMAL,AudioManager.ROUTE_EARPIECE,
    AudioManager.ROUTE_ALL);
                   //am.setMode(AudioManager.MODE_NORMAL);


                   Log.d("SPEAKERPHONE", "Is speakerphone on? : " +
    am.isSpeakerphoneOn());

                   atrack.setPlaybackRate(sampleRate);


                   byte[] buffer = new byte[buffersize];
                   arec.startRecording();
                   atrack.play();
                   //atrack.setStereoVolume(atrack.getMaxVolume(),
    atrack.getMaxVolume());

                   final float frequency = sampleRate;
           float increment = (float)((2*Math.PI) * frequency / 44100); //
    angular increment for each sample
           float angle = 0;
           //AndroidAudioDevice device = new AndroidAudioDevice( );

                   while(isRecording) {

                           try {

                                   arec.read(buffer, 0, buffersize);
                                   atrack.write(buffer, 0, buffer.length);

                           } catch (Exception e) {
                                   Log.d("Record", ""+e);
                           }
                   }

                   arec.stop();
                   atrack.stop();
                   //device.releaseTrack();
                   isRecording = false;
           }


           public boolean isRecording() {
                   return isRecording;
           }

           public void setRecording(boolean isRecording) {
                   this.isRecording = isRecording;
           }

           public AudioManager getAm() {
                   return am;
           }

           public void setAm(AudioManager am) {
                   this.am = am;
           }

       public void stopRecording(){
               arec.stop();
       arec.release();
       atrack.stop();
       atrack.release();
       arec=null;
       atrack=null;
       setRecording(false);
       this.stop();
       }
}

Answer 1

转到this工作音频记录示例，如果您在模拟器中进行测试，则采样率ll为8000默认值。对于设备将采样率提高到44100或高并记录它，它会更好地工作。

录制的声音非常低，Android上录制了很多噪音

1 个答案: