Wilhelm Friedmann Bach was significant in developing the relatively new keyboard sonata form between the baroque and classical periods. Combining stylistic elements from his father's generation and his own, the ambitious Sonata in D major was admired as "the most significant before Beethoven". The scale of the substantial Sonata in F for two keyboard instruments, one of WF Bach's best-known compositions, is such that it is sometimes referred to as a Concerto. Julia Brown's recordings give WF Bach's keyboard works "a liberty and sense of fun and engagement that make the music come alive".