What is a BEMUSE file? A BEMUSE file is a sound data file created by Bemuse Custom Song Workshop, a program used to optimize songs for play in Bemuse. It typically contains several .OGG audio files, packaged together to make them easier for Bemuse to load. Typically, BEMUSE files are stored in a bemuse-data directory, alongside a .JSON file and other BEMUSE files.

More Information Bemuse is an online rhythm game in which players hit buttons in time to music. While Bemuse allows players to play songs saved in the standard .BMS song format and its variants, players can also optimize their songs for use with Bemuse. To do so, they use Bemuse's associated Custom Song Workshop. While optimizing songs, Bemuse Custom Song Workshop typically produces several BEMUSE files. These files are stored in a subdirectory (named bemuse-data ) of the original song's directory. They contain all the original song's audio assets, converted to the OGG format and packaged together for easier in-game reference. Each BEMUSE file can be only up to 1.4 MB in size. This is why a song's directory typically contains several BEMUSE files (which, between them, contain all the song's OGG assets). The metadata.json file stored alongside a song's BEMUSE files specifies the BEMUSE files that song uses, as well as the OGG files those BEMUSE files contain.