Assen Karastoyanov (1893-1976) was born in Samokov. He graduated flute with E. Pril and harmony with P. Huon from the High School of Music in Berlin, specialised composition with Paul Dukas at L’Ecole Normale in Paris and graduate also composition and theory of music at the Leipzig Conservatory in 1932. Karastoyanov was Professor at the State Academy of Music - Sofia. He is author of many theoretic studies, articles and textbooks. He has been awarded many prizes and orders.