Thanx alot 4 rply
but if i use large buffer size ,it produce delay between record and
play.
On May 26, 11:46 am, Daniel Drozdzewski <daniel.drozdzew...@gmail.com>
wrote:
> Neha,
>
> Your echo comes from the fact that you are using 400 bytes buffer to
> transfer the recording to the playback.
> It will physically take time to fill that buffer and then process.
>
> Making the buffer much smaller might not necessarily work either, as
> it will mean more overhead of the recording + playing management in a
> unit of time. However adjusting the buffer size would be a first step.
>
> You are using getMinBufferSize() method, but you ignore the returned
> values, when it comes to the buffer used to transfer the recording to
> the playback track.
>
> You should use Math.max(recordingMinBufferSize, playbackMinBufferSize)
> as a buffer size in all 3 cases.
> You should also write only bytesRead bytes, rather than writing full
> buffer every time.
>
> Daniel
>
>
>
>
>
>
>
> On Thu, May 26, 2011 at 10:28 AM, neha <neha.05...@gmail.com> wrote:
> > Is there any way to synchronize the capturing and playback of audio
> > data in Android?
>
> > I am using audioRecord/track to achieve this.But its producing echo.
> > Is there any way to cancel echo.
> > My code is-
> > {
> > isRecording=true;
>
> > bufferSize =
> > AudioRecord.getMinBufferSize(8000,AudioFormat.CHANNEL_CONFIGURATION_MONO,AudioFormat.ENCODING_PCM_16BIT);
> > audioRecord = new
> > AudioRecord(MediaRecorder.AudioSource.MIC,
> > 8000,
> > AudioFormat.CHANNEL_CONFIGURATION_MONO,AudioFormat.ENCODING_PCM_16BIT,
> > bufferSize);
>
> > audioRecord.startRecording();
>
> > int BUFFER_SIZE_IN_BYTES
> > =AudioTrack.getMinBufferSize(RECORDER_SAMPLERATE,AudioFormat.CHANNEL_CONFIGURATION_MONO,RECORDER_AUDIO_ENCODING);
> > AudioTrack audioTrack = new
> > AudioTrack(AudioManager.STREAM_SYSTEM,
> >
> > 8000,AudioFormat.CHANNEL_CONFIGURATION_MONO,
> >
> > AudioFormat.ENCODING_PCM_16BIT, BUFFER_SIZE_IN_BYTES,
> >
> > AudioTrack.MODE_STREAM);
> > byte[] buffer=new byte[400];
> > audioTrack.play();
> > while (isRecording) { int bytesRead =
> > audioRecord.read(buffer,
> > 0,
> > 400);
> > int bytesWritten = audioTrack.write(buffer,
> > 0, 400);
>
> > }
>
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> --
> Daniel Drozdzewski
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