.M2A File Extension
What is an M2A file?
Audio file that has been compressed with MPEG-1 Layer II audio compression; used primarily by video-editing programs; may be exported along with a corresponding .M2V video file; also known as an Apple MPEG-1/2 Audio file.
The MPEG-1/2 format is supported by QuickTime Player and various other media players. Most MPEG-compressed audio files now use .MP3 compression.