From 44 Duos For 2 Violins-Bela Bartók's 44 Violin Duos or selections therefrom have been the source of arrangements for a variety of instruments such as for piano (one set by the composer the Petite Suite) band as well as duos for every member of the string family even contrabass. These all followed the original concept: a pair of identical instruments. This set for viola and violoncello is intended to fill a gap where two instruments an octave apart can produce the broader tonal range. (P. Bartók)