File Extension M4A

File type: MPEG-4 Audio Layer File

About the M4A file type:

If Windows cannot find the appropriate program associated with .M4A files, then your registry may have errors. Check your Windows registry for errors (includes file association errors).

The .M4A file extension identifies MPEG-4 Audio Layer files. MPEG-4 is a video streaming file format developed by Apple Corporation and can be viewed in video players such as Apple's QuickTime. This is a compressed video format which can be used to encode videos without significant quality loss.