Cakewalk Bundle (BUN)
Cakewalk by Twelve Tone Systems (later Cakewalk, and now Roland) uses a "bundle" archive format to encapsulate all the files connected with a project of the Cakewalk Project (WRK) format. This is used when you want to back up or transfer an entire project all in one file.
Other Cakewalk file formats:
- Cakewalk Dump Request Macro (.drm)
- Cakewalk Instrument Definition File (.ins)
- Cakewalk Sample Definition File (.sfz)