gistfile1.txt

    private void startMediaRecorder() {

        mediaRecorder = new MediaRecorder();
        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        mediaRecorder.setAudioChannels(1);
        mediaRecorder.setAudioSamplingRate(8000);
        mediaRecorder.setAudioEncodingBitRate(32000);
        /*
        mediaRecorder.setAudioChannels(1);
        mediaRecorder.setAudioSamplingRate(44100);
        mediaRecorder.setAudioEncodingBitRate(96000);
         */
        mediaRecorder.setMaxDuration(RECORDING_MEDIA_RECORDER_MAX_DURATION);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
            mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.HE_AAC);
        } else {
            mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
        }
        mediaRecorder.setOutputFile(getMicFilepath());

        mediaRecorder.setOnInfoListener((mediaRecorder, what, i1) -> {
            if (what == MediaRecorder.MEDIA_RECORDER_INFO_MAX_DURATION_REACHED) {
                dismiss();
            }
        });

        try {
            mediaRecorder.prepare();
        } catch (IOException e) {
            Log.e(TAG, "", e);
        }

        mediaRecorder.start();
    }