Before this thread gets too cold, I thought I'd post some examples of
Clark Xylophone A-rolls, right from the horse's mouth: an authentic
Clark Roll catalog from June of 1928 that I own.  In it you will see
many titles of Clark Xylophone A-roll arrangements, designed to really
pep-up a single-stroke xylophone A-roll machine, coax a reiterating
xylophone piano into another dimension, or give a pipe-equipped A-roll
piano an otherworldly (and uniquely pleasant) "fluttery" sound!  I have
many of these types of xylophone-arranged A-rolls and have played them
on both types of pianos, and I can vouch for their truly unique brand
of sound quality!

Cheers,

Mark Forer

 [ Thanks, Mark.  I'll place the material at the MMD Media site,
 [ http://mmd.foxtail.com/MMMedia/  -- Robbie