People's Artist of the Ukrainian SSR (1969) and winner of Shevchenko National Prize (1980).
[1] He was born on 1 December 1909 in Kolomyia (now Ivano-Frankivsk region) in the family of the famous Galician doctor Yosyf Kos.
[1] While studying at Stanislav Gymnasium, he created a choir and began recording songs.
In the 1930s, together with Bohdan Vesolovsky, he was a member of "Jablonsky Jazz Chapel" ("Yabtso-Jazz"), later popular in the Lviv region.
[2] In 1934 – 1937 he taught at the Stryi branch of the Mykola Lysenko Higher Music Institute.