When composers play or conduct they seldom get sentimental. They rely on the quality of the music to make the emotional points rather than trying to drag every breath of pathos out of the phrasing. Ades approaches Janacek with just that balance between affection and respect. These pieces, the best of the Moravian’s piano music, come across as beautifully articulated essays, serious reflections on some harrowing events that at the same time need no narrative to stand as introspective masterpieces. There is plenty of drama, no showmanship or virtuosity for its own sake….