You ask why I have never written a trio. Forgive me, dear friend; I would do anything to give you pleasure, but this is beyond me ... I simply cannot endure the combination of piano with violin or cello. To my mind the timbre of these instruments will not blend ... it is torture for me to have to listen to a string trio or a sonata of any kind for piano and strings. To my mind, the piano can be effective in only three situations: alone, in context with the orchestra, or as accompaniment, i.e., the background of a picture.