I was playing a Universal roll and I noticed a constant band of very tiny
double perforations on the right and left of the roll as it played.  I
thought maybe that they were there for reproducing pianos to keep the
stress the same.  Does anyone know of any reason for them?

Damon Atchison
Damon66@juno.com

 [ Those are the "snake bites", Damon.  Pianos fitted with the extra
 [ pneumatic logic -- "Themodist" and "Solodant" actions -- would
 [ accent the notes which are struck while the tiny holes are "on".
 [ Until you acquire a piano like this you can make the accents
 [ with your feet.  :)   -- Robbie