Born 5.6.1954 in Vienna. University of Music in Vienna, M.A. of arts in Composing (F.Cerha), Orchestra-Conducting (O.Suitner), an Musical Pedagogics.
1979 - 1981 appointed teacher at the University of Music in Vienna. Since 1981 freelance composer.
1983 co-initiator of the Viennese Summer Seminars for modern music.
Soyka got many awards for his compositions. He wrote operas, concertos for piano and orchestra, for violin, for two violins, for viola, for flute, for saxophone, for violoncello, for percussion, for organ; ballet music, choral and chamber music, songs e.g. - most of them were performed and broadcasted in several European countries, Australia, Azerbaijan, Japan, Cuba, e.g. Numerous ordered compositions he wrote for music-organisers and festivals in Azerbaijan (Baku Arts-Centre), Klagenfurt and Amstetten (stages), Vienna, Göppingen (municipals), Genova (Italy), Györ (Hungary), Salzburg, Sofia (Bulgaria), Vilnius (Lithuania) , for radio, for records, TV e.g.