Free HD Video Converter Factory is a trusted program to convert M4A to WAV on Windows. And featured with a straightforward interface, it will help you transfer M4A audio to WAV in simple clicks. Of course, it also supports other audio formats including MP3, FLAC, ALAC, AAC, AC3, and more. Moreover, it comes with a built-in editor allowing trimming and merging the audio files easily.
Now, just free downloadfree download this program and follow the tutorial below to convert from M4A to WAV.