Listen to Sonata No. 9 in G Major, Op. 6: I. Grave adagio online. Sonata No. 9 in G Major, Op. 6: I. Grave adagio is an English language song and is sung by Baby Mozart Orchestra. Sonata No. 9 in G Major, Op. 6: I. Grave adagio, from the album Classical Music for Baby Sleep – Best Classical Music for Your Baby, Deep Sleep, Baby Relaxation, was released in the year 2017. The duration of the song is 3:30. Download English songs online from JioSaavn.