Listen to Mozart: Sonata for Piano and Violin in A, K.12 - for Harpsichord and Violin - 2. Allegro online. Mozart: Sonata for Piano and Violin in A, K.12 - for Harpsichord and Violin - 2. Allegro is an Unknown language song and is sung by Thomas Brandis, Waldemar Döling and Wolfgang Böttcher. Mozart: Sonata for Piano and Violin in A, K.12 - for Harpsichord and Violin - 2. Allegro, from the album Pieces by Mozart, was released in the year 2021. The duration of the song is 1:56. Download Unknown songs online from JioSaavn.