Android Question how to save wav files with google supported encoding?

I adopted this example to record audio and save as wav file: https://www.b4x.com/android/forum/t...-5-new-audiostreamer-object.30550/post-177599

With the recorded audio the next step I want to do is to apply to some google functions but it seems like the format is not supported. How should I change the wav heading or setting so that it can be supported? Audio file formats and encodings can be found here: https://cloud.google.com/speech-to-text/docs/encoding#audio-encodings