Question

我正在尝试从麦克风录制并将录制的数据仅发送到左声道，在右声道上分别有零，但我的技术似乎不起作用.. 我正在使用PCM 16和单声道模式的音频录音和音频轨道我似乎做错了什么？

package com.example.leftrighttest;

import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioRecord;
import android.media.AudioTrack;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        int freq=44100;
        final int bufferSize = (AudioRecord.getMinBufferSize(freq,AudioFormat.CHANNEL_IN_MONO,
                AudioFormat.ENCODING_PCM_16BIT ));

        AudioRecord audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, freq,AudioFormat.CHANNEL_IN_MONO,
                AudioFormat.ENCODING_PCM_16BIT, bufferSize );


        AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,
                (int) freq,AudioFormat.CHANNEL_OUT_MONO,
                AudioFormat.ENCODING_PCM_16BIT, bufferSize,
                AudioTrack.MODE_STREAM);

        audioTrack.setPlaybackRate(freq);

        final byte[] buffer = new byte[bufferSize];
       audioRecord.startRecording();




                    byte[] byteBufferFinal = new byte[bufferSize*2]; 

                    //LL RR LL RR LL RR 
                    while(true)
                    {
                    audioRecord.read(buffer, 0, bufferSize);
                   for(int k = 0, index = 0; index < byteBufferFinal.length - 4; k=k+2){
                        byteBufferFinal[index] = buffer[k]; // LEFT {0,1/4,5/8,9/12,13;...}
                        //System.out.println(byteBufferFinal[index]);
                        byteBufferFinal[index+1] = buffer[k+1];
                       // System.out.println(byteBufferFinal[index+1]);
                        index = index + 2;
                        byteBufferFinal[index] =0; //byteBuffer2[k]; // RIGHT {2,3/6,7/10,11;...}
                        //System.out.println(byteBufferFinal[index]);
                        byteBufferFinal[index+1] =0;// byteBuffer2[k+1];
                       // System.out.println(byteBufferFinal[index+1]);
                        index = index + 2;
                    }
                       audioTrack.write( byteBufferFinal, 0, bufferSize*2);
                       audioTrack.play();
                    }

    }



}

Answer 1

我想通了，所以正确的解决方案是1）将模式从单声道改为立体声2）读取缓冲区，格式如下（L，L，R，R，L，L，R，R ....）所以每两个字节被发送到一个通道（pcm 16）然后我将零设置为我想要取消的通道所以如果我只想要左通道工作我的缓冲区将是（L，L，0， 0，L，L，0,0，.....）

左右声道与麦克风录音分离

1 个答案: