I should take back some of what I said about the documentation. Layout is certainly different; and board schematics missing. But, beyond that, it looks like the proper detail for what wires do what is there - just organized differently than I'm used to.
Bells for chimes: Documented. Looks to be designed to fire 26-1200 coils, for 1 point, 10, points, and 100 points (3 bell circuits total); and plugs into the same "Node 11" backbone 4-driver board.
Speaking of sound: Simply attenuating all but the synthetic bell sounds.. actually helps a lot. (In my opinion, of course!) You can effectively silence the music, callouts, sound effects, and synthetic bells (4 categories total).