Listen to Violin Sonata in G Major, BWV 1021 I. Adagio (Flute Harp Version) online. Violin Sonata in G Major, BWV 1021 I. Adagio (Flute Harp Version) is an English language song and is sung by Bedtime Sleep Music Academy. Violin Sonata in G Major, BWV 1021 I. Adagio (Flute Harp Version), from the album Peaceful Music at Bedtime – Classical Instruments to Sleep, Music to Bed, Music for Soul, Classical Melodies at Bedtime, was released in the year 2016. The duration of the song is 3:15. Download English songs online from JioSaavn.