Which Russian opera singer with a basso profundo vocal range died April 12, 1938?
Feodor Chaliapin: Feodor Ivanovich Chaliapin (Russian: Фёдор Ива́нович Шаля́пин , "Fyodor Ivanovich Shalyapin"; ] ; February 13 [O.S. February 1] 1873 April 12, 1938) was a Russian opera singer.
i don't know