Hello everybody
Any thought?
On Sep 13, 9:19 pm, harpreet singh <harpreetj...@gmail.com> wrote:
> Hi,
>
> I am trying to record the voice using AudioRecord class and writing
> the read bytes to speaker using AudioTrack class. I am able to hear
> the voice coming from Speaker but the voice is very low and a lot ofnoiseis
> coming along with the recorded voice.
>
> Any solution to resolve this problem to reduce thenoiseand loud the
> actual voice.
>
> I am using below code for this:
>
> 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();
> }
>
>
>
>
>
>
>
> }
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