Mozart composed his D Major Sonata, K. 311 in 1777 when he was twenty-one years old. He seemed to have hit his stride as a composer of keyboard sonatas, assimilating into this piece artistically fulfilling juxtapositions of brilliant virtuosity and subdued lyricism, humor and heartfelt expression. The first movement begins in a spirited manner, then gives way to a lyrical second theme. As the movement draws to a close in pure joy, the contrast of the pleasant and soothing second movement is all the more striking—Mozart\u27s niche as an opera composer proves evident by the beautiful singing melodic line. The third movement rounds out the sonata, providing yet another contrast in mood; a humorous character is implied by sudden changes in dyna...