Listen to Sonata No. 8 in D Major, K. 311: I. Allegro maestoso online. Sonata No. 8 in D Major, K. 311: I. Allegro maestoso is an Unknown language song and is sung by Sleep Music Lullabies. Sonata No. 8 in D Major, K. 311: I. Allegro maestoso, from the album Falling Asleep: Best Sleep Music Therapy - Dr. Waheguru Sleeping Music & Sleeping Nature Sounds Relaxation, was released in the year 2013. The duration of the song is 5:17. Download Unknown songs online from JioSaavn.