His compositional style was described by Dr. Werner Pelinka in 1987 in the cultural magazine morgen: “„Soyka´s music is influenced by the twelve-tone system, but not by the dogmatic, serial kind.
It is just this emotional aspect which triggers an immediate response and understanding in the listener, even though one might not be able to follow every rational structure and detail.
His tone language is varied, beautifully melodious as well as spirited and powerful in rhythm.”Soyka also investigated connections between chromatic and micro-interval music.
1979- 1981 teaching representatives at the University for Music and Dramatical Art in Vienna, 1982-1983 high school-teacher, 1983 Austrian state scholar for composition.
Further long-term functions: High school teacher, leader of a church choir, member of the executive board in the Austrian composer federation, subject lectures at English and Australian Music-Universities, music journalism for many cultural journals (Ö.Musikzeitschrift u.a.