Mozart Violin Sonata No. 27 in G major, K. 379 (1781) V iolin Sonata No. 27 in G major (K. 379/373a) was composed by Wolfgang Amadeus Mozart in 1781 and first published in the same year. The work consists of:[1] 1.Adagio – Allegro 2.Theme: Andantino cantabile, with variations: 1.Var. 1 (piano without violin) 2.Var. 2 3.Var. 3 4.Var. 4 5.Var. 5: Adagio, followed by Allegretto..