The music of Quasi Una Fantasia cannot be classified easily. The duo performs literary song and modern music striving to discover and develop the unique marriage of the voice and the accordion, not often employed in music. As far as the literary song goes, the duo, constantly in search of new musical qualities is inspired by various music genres including the ballad, classical, improvised, klezmer, French, Fado, Trova or jazz music. The music the ensemble performs could be described as impressionist and illustrative. It follows the text and employs all possible means to convey its meaning and the mood inherent to it, at the same time concentrating on the sound qualities which makes it possible to call it colour music. In the realm of modern music Quasi Una Fantasia reaches for paratheatrical means incorporating into their repertoire graphic scores, improvised music as well as compositions both of their own and of modern composers. The artists also collaborate with the other instrumentalists, a choir and acrobats. The mutual permeation and collaboration of the two individual creative personalities creates unique quality reaching beyond the stereotype singer/accompanist.