A musical composition for violin accompanied by a keyboard instrument and in earlier periods with a bass instrument doubling the keyboard bass line. The violin sonata developed from a simple baroque form with no fixed format to a standardised and complex classical form. Since the romantic age some composers have pushed the boundaries of both the classical format as well as the use of the instruments. Brahms - 04 Brahms Sonata for Piano and Violin No 2 in A Major Op 100 I Allegro amabile Mozart - 02. Sonata in F, KV 13 Andante