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The Sonata for Two Pianos in D major, K. 448 is a piano work composed in 1781 by Wolfgang Amadeus Mozart, at 25 years of age. It is written in strict sonata-allegro form, with three movements. The sonata was composed for a performance he would give with fellow pianist Josephine von Aurnhammer. Mozart composed this in the galant style, with interlocking melodies and simultaneous cadences. This is one of his only formal compositions written exclusively 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. The sonata is written in three movements, 1. Allegro con spirito 2. Andante and 3. Molto Allegro. The first movement begins in D major, and sets the tonal center with a strong introduction. The two pianos divide the main melody for the exposition, and when the theme is presented both play it simultaneously. Mozart spends little time in the
