Sadettin Heper (1899–1980) was a composer of Turkish music considered as an important link to the world of Turkish Mevlevi music before the foundation of the Turkish Republic in 1923. He was bornin the Eyüp neighborhood of Istanbul as the son of Halit Efendi and Zehra Hanim. Until the religious venues where the Mevlevis practiced were closed in 1924 dueto the prevailing secular ideology, he played the kudüm, a percussion instrument, in Mevlevi religious ceremonies.