How to configure MediaRecorder to record audio in WAV format at 48KHz in Android Studio?

Question

So far I have this: With this code I can configure Media Recorder to record in 3gp, but i need to record in WAV for a later process.

private void setupMediaRecorder() {
    mediaRecorder = new MediaRecorder();
    mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
    mediaRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);
    mediaRecorder.setOutputFile(MainActivity.PATH_TEMP_RECORDING);
}

score 2 · Answer 1 · answered Aug 14 '19 at 00:14

Found it. This configuration works:

    mediaRecorder = new MediaRecorder();
    mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    mediaRecorder.setOutputFormat(AudioFormat.ENCODING_PCM_16BIT);
    mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
    mediaRecorder.setAudioChannels(1);
    mediaRecorder.setAudioEncodingBitRate(128000);
    mediaRecorder.setAudioSamplingRate(48000);
    mediaRecorder.setOutputFile(MainActivity.PATH_TEMP_RECORDING);

not working! where did you find this configuration? – Radhey May 01 '20 at 05:37 — Radhey, May 01 '20 at 05:37

score 1 · Answer 2 · answered Oct 05 '22 at 19:33

The MediaRecorder do not let you record in the lossless format. Instead, AudioRecord is more low-level API for audio recording, while you need to write buffer code and filewriting code yourself. Here is a example of using AudioRecord to write into .pcm file. WAV is basically a container of PCM 2. If you want to write into .wav, you need to write the header yourself, and here is an example of using AudioRecord to write into .wav.

How to configure MediaRecorder to record audio in WAV format at 48KHz in Android Studio?

2 Answers2