Listen to Viola Sonata in D Minor (Unfinished): I. Allegro moderato online. Viola Sonata in D Minor (Unfinished): I. Allegro moderato is an Instrumental language song and is sung by Michael Kugel and Elena Kuznetsova. Viola Sonata in D Minor (Unfinished): I. Allegro moderato, from the album Michael Kugel. Martini, Bach, Paganini, Glinka, Waxman, was released in the year 2009. The duration of the song is 10:04. Download Instrumental songs online from JioSaavn.