How exactly does the Themodist work? They have 2 levers (on the pianos
I've seen) which, when pulled to one side, make the piano play
softer. I assume the stack is divided and the Themodist holes accent
individual notes or chords. I've never seen one that actually does this,
however. Does the piano play at a medium volume and then "forte" when
an accent hole appears? Must the levers be used during a Themodist roll?

Philip Jamison