Listen to Sonata in D: Allegro assai online. Sonata in D: Allegro assai is an English language song and is sung by Jascha Heifetz and Luigi Boccherini. Sonata in D: Allegro assai, from the album Jascha Heifetz plays Sonatas for Violin, was released in the year 2013. The duration of the song is 2:03. Download English songs online from JioSaavn.