Hi All,  I believe some clarification is required here because the
modern player system that was manufactured by Aeolian is called the
"Standard Pneumatic Action", not a "Duo-Art", and the "Duo-Art" is
a reproducing player system that was manufactured by Aeolian from
the mid-teens until about 1930.

Where the confusion seems to start is in the fact that the Duo-Art
reproducing player system was available in a piano made by the
"Aeolian American Corp." called the Duo-Art Pianola, and in the
late 1960s and '70s, "Aeolian Corp." sold both a Pianola (a 64-note
spinet player) and a DUO-ART player.  The DUO-ART player was actually
made by Hardman, but it also contained the Standard Pneumatic Action,
which is not to be confused with the "Standard Player Action", which
was manufactured by the Standard Player Action Company until around
1930.  (The Standard Player Action was installed in well over
a hundred different makes of player pianos, but I digress.)

Confusing the matter even further, Aeolian also produced a player
with the name "Duo/Art" and Hardman also made a player called the
"Duo", but none of the modern players have a Duo-Art reproducing
action.

The reason that the modern Aeolian Duo/Art, the Hardman DUO-ART,
and the Hardman Duo player pianos go into rewind almost as soon as
a Duo-Art reproducing roll starts is because the Standard Pneumatic
Action, which is in all of the above named modern players, uses the
same holes in the trackerbar for rewind as the Duo-Art reproducing
system uses for the expression codes.  So, as soon as the expression
codes in the Duo-Art roll pass over the rewind holes in the Standard
Pneumatic Action, the automatic rewind device shifts the transmission
into rewind.

Hope this clears thing up... :-\

Musically,
John A Tuttle
Player-Care.com
Brick, New Jersey, USA

P.S. I suppose I could have simply said, "Reproducing rolls won't
work right on a modern Aeolian player piano."  But what fun is that?!