Audio Recording in Stereo giving same data in Left and Right channels

Question

I am trying to record and process audio data based on differences in what gets recorded in the left and right channel. For this I am using Audio Record class, with MIC as in

Answer 1

Here is a working example for capturing audio in stereo (tested with Samsung Galaxy S3 4.4.2 SlimKat):

private void startRecording() {
    String filename = Environment.getExternalStorageDirectory().getPath()+"/SoundRecords/"+System.currentTimeMillis()+".aac";
    File record = new File(filename);
    recorder = new MediaRecorder();
    recorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
    recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
    recorder.setAudioEncodingBitRate(128000);
    recorder.setAudioSamplingRate(96000);
    recorder.setAudioChannels(2);
    recorder.setOutputFile(filename);
    t_filename.setText(record.getName());
    try {
        recorder.prepare();
        recorder.start();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

If your phone supports stereo capturing, then this should work :)