.YM File Extension
File TypeAtari ST Audio File
What is a YM file?
Audio file used by the Atari ST, an older computer system that was discontinued in the early 1990s; contains an audio loop or track that can be played back with the Atari ST YM chip; supports storage for the song name, author, comments, and the audio data itself.
Even though the Atari ST system has been discontinued, YM audio can still be played back with several Windows applications.