Which Russian opera singer with a basso profundo vocal range died April 12, 1938?
Basso profondo Basso profondo (Italian: "deep bass"), sometimes basso profundo or contrabass, is the bass voice subtype with the lowest vocal range.
Jan Rubeš Jan Ladislav Rubeš CM (6 June 1920 – 29 June 2009) was a Czech-Canadian bass opera singer and actor.