.bms

Song file used by BeatMania, a rhythm video game with a DJ controller interface; saved in a text format and stores data referenced during the playback of song; includes the song title, artist, genre, BPM (beats per minute), number of players, note positions, references to sound effect files, and other information.

BMS files are native to BeatMania, a console-based video game, but can be opened by StepMania on a PC.