Listen to Mozart: Sonata for Piano duet in D, K.381 - 3. Allegro molto online. Mozart: Sonata for Piano duet in D, K.381 - 3. Allegro molto is an Unknown language song and is sung by Monique Haas and Heinz Schroter. Mozart: Sonata for Piano duet in D, K.381 - 3. Allegro molto, from the album Music for Walking: Mozart, was released in the year 2021. The duration of the song is 2:47. Download Unknown songs online from JioSaavn.