The Duo for flute and violin was written shortly after a study visit to Finland, and is dedicated to a fellow student, the flutist and conductor Jacques Delacôte.

The piece provides an example of Staar's early involvement with dodecaphony, whose application here remains at a very superficial and rudimentary level. It consists of three movements:

I Allegro scherzoso
II Adagio
III Finale (Animato)

The Duo is one of the few pieces to have survived the composer's "purges," in which he destroyed the majority of his early attempts at composition.

Duration: 6-7 minutes