Mozart’s several attempts to compose a sonata for four hands led to the unique and successful Sonata in D Major, in which both players are given the possibility to use the whole keyboard. The clear trill in the admirable first phrases announces how dual and complementary the two pianos are in the piece. Then the reunion of the two voices in similar parts magnifies the music.
A continuous dialogue between the piano and string trio follows in Strauss’ Quartet Op. 13. Passion and humility share a science of contrasts until the climax of the final chord is reached in a breath of life.