Sonata for Two Pianos in D major, KV 448 / 375a

The Sonata for Two Pianos in D major, K. 448, is a work composed by Wolfgang Amadeus Mozart in 1781, when he was 25. It is written in strict sonata-allegro form, with three movements. The sonata was composed for a performance he would give with fellow pianist Josepha Auernhammer. Mozart composed this in the galant style, with interlocking melodies and simultaneous cadences. This is one of his few compositions written for two pianos. This sonata was also used in the scientific study that tested the theory of the Mozart effect, suggesting that classical music increases brain activity more positively than other kinds of music.