ffmpeg wav to m4a code example
Example 1: how to convert m4a to wav with ffmpeg
ffmpeg -i inputFilename.m4a OutputFilename.wav
Example 2: convert m4a to wav ffmpeg
ffmpeg -i filename.mp3 newfilename.wav newfilename.ogg newfilename.mp4
ffmpeg -i inputFilename.m4a OutputFilename.wav
ffmpeg -i filename.mp3 newfilename.wav newfilename.ogg newfilename.mp4