This format contains song data only. It is often accompanied by a .BNK file containing FM-synthesis instruments. If there's a .BNK file with the same name as the .ROL then it will automatically be read in together with the .ROL. If there is not, then the program will look for a file named "Standard.bnk" in the same directory. If found it will load instruments used by the song from that (but not any instruments not used by the song).