I didn't even want to open the can of worms about whether Joplin actually
hand-played those Connorized rolls.  He may have recorded something for
them, but the evidence is pretty clear that they were at the very least
edited (extensively?) by the Connorized folks.  Such things as the key of
the roll and the embellishments which might both have appeared in
published band arrangements are significant clues, although I've never
known these to be seriously studied by anyone.

Anyway, there's another Maple Leaf Rag roll which was issued as hand-
played by Joplin (Universal Uni-Record #202705) and which sounds more
like a hand-played roll.  That still doesn't guarantee that the editors
didn't mess with it...

Rob DeLand