Ondřej Cífka, Umut Şimşekli, Gaël Richard (2020)
The phrase commonly refers to compressed archive files containing song libraries or software for Band-in-a-Box (BIAB) , an intelligent automatic accompaniment tool . While "rar" files themselves are just containers, they are frequently used by the BIAB community to share large MIDI and "RealTrack" datasets for music production. Download biab (1) rar
An interesting academic paper that utilizes these types of BIAB files for advanced music research is: Ondřej Cífka, Umut Şimşekli, Gaël Richard (2020) The