Wolfgang Delnui studied eurhythmics at Institut de Rythmique Jaques Dalcroze de Belgique in Brussels. He then studied composition under Robert HP Platz and music in education at Maastricht Conservatory (The Netherlands).
His works have been performed in festivals such as Ars Musica (Brussels), Gaudeamus Muziekweek (Amsterdam), Ostbelgienfestival (Eupen) and Saint-Petersburg International New Music Festival reMusik.
Beside his activities as a composer he also works as a music teacher. As such he published the book Blitzschnelle Ideen mit Rhythmus und Musik in 2015.
Delnui is co-founder of the East Belgian association for the promotion of new music KL-EX.