I still haven't heard anything about George Bogakto's roll speed test
for A and O rolls.

I'm guessing that many A roll pianos cannot play _all_ A rolls at the
correct tempo.  There was a wide range of roll speed settings from the
beginning of the A roll to the nineteen-thirties.  On my Cremona, the
highest setting on the roll drive is still not high enough to play some
rolls from the later twenties (nothing that a temporary modification
can't fix).

I'd be interested to hear just how many A roll pianos (including those
great Seeburgs) have a wide enough range for all A rolls.

Brian Smith

 [ In the early Seeburg style A that I own, the roll is driven from a
 [ rubber-tired wheel at right angles to a large flat surface on the
 [ the big pump pulley.  The wheel contact radius is adjustable over
 [ a 2-to-1 range.  If the pump shaft turns at the appropriate speed
 [ then the music roll speed can be adjusted from 6.0 to 12.0 feet per
 [ minute initial speed (Tempo 60 to Tempo 120).  -- Robbie