Listen to Violin Sonata No. 26 in B-Flat Major, K. 378: I. Allegro moderato online. Violin Sonata No. 26 in B-Flat Major, K. 378: I. Allegro moderato is an English language song and is sung by Aida Stucki. Violin Sonata No. 26 in B-Flat Major, K. 378: I. Allegro moderato, from the album Mozart: Violin Concertos & Sonatas, was released in the year 2017. The duration of the song is 9:03. Download English songs online from JioSaavn.