This note received yesterday from MMDer Mark Fontana:

> Robbie,  Do you happen to know where the stack split point is for
> each of the systems  Duo-Art, Ampico A, Ampico B, Welte?
>
> I think it is between E and F (above middle C) for several of these.
> But in several books I checked out from the library, the split points
> are not mentioned at all.

Here's the start of a list.  I hope my memory is correct...!  I use "Midi
Note Numbers" (wherein Middle C is defined as note 60C) showing highest
bass/lowest treble note:

  Bass Division   Treble Div.     System
   - - - - - -     - - - - -       - - -

  21A       --    108A            Modern 88-key piano
  12A       --    108A            97-key Boesendorfer Imperial

  23B  - 64E      65F  - 105A     Ampico A & B (83 notes)
  25C# - 62D      63D# - 104G#    Duo-Art (80 notes)
  ?               ?               Welte (all versions)

We need help from the Digest folks for this, Mark.  I'd like to expand
this list to encompass all the reproducing and expression pianos with
"split stacks."

Robbie Rhodes