Born in Bregenz, Dünser studied composition after his Matura first at the Conservatory [de] of his hometown and later at the Vienna Academy of Music with Francis Burt.

His most important works, which have been interpreted by international ensembles, conductors and soloists, include the orchestral piece Der Wanderer (commissioned by the Neue Arbeiterzeitung in 1986 and premiered by the Vienna Symphony Orchestra in 1988), the string quartet "Elegie.

In my work, external musical elements always play an important role: autobiographical sketches, literary references, images, moods....

They penetrate the work and, together with the structures inherent in it, create a fabric, a network of relationships and mutual influences.Everything grows into one another and forms a larger, superordinate whole that can also dialectically include its opposite, ruptures, unrelatedness, fragmentation.

At first hearing, the various figures seem quite free, but they are very often subject to a precise formal plan:Developments, processes, atmospheric sound islands, outbreaks, silences are built into a multi-layered architecture of the composition.