Mozart Opera Arias for Bass Baritone and Orchestra, Vol. 1 W.A. Mozart - Music Minus OnePublisher Desc. This collection of Bass Baritone arias presents a wide variety from Mozart's greatest operas. Listen to master bass baritone Ivajlo Djourov work his magic, then he stands aside so you can stand center stage with the world famous Sofia Opera Orchestra! Includes an expansive, newly engraved vocal score, printed on high quality ivory paper; and a CD+G graphics enabled compact disc with complete versions (with soloist) in digital stereo,