Even prolific geniuses such as Schubert and Mozart left behind numerous sketches and incomplete drafts that are rarely given attention alongside the celebrated masterpieces but sometimes contain the most daring experiments. In their duo recital, Nils Mönkemeyer and William Youn examine some of the fragments that have come down to us from these two composers in contemporary completions. In addition to these musical mosaics, they also perform Mozart’s Violin Sonata K. 379 and Schubert’s famous “Arpeggione” Sonata, both in arrangements for viola.