In response to "How It's Made", I found a narrated video which
plays for 7 minutes 45 seconds, showing how QRS Rolls are made.

  http://www.playerpianos.com/2009/04/player-piano-rolls_28.html 

Hope it is still available to view.

John Dombrosky
Florida

 [ http://www.youtube.com/watch?v=i3FTaGwfXPM
 
 [ Piano roll production at QRS Music [dur. 7:44]
 [   A late-1980s tour of QRS Music's piano roll manufacturing facility
 [   in Buffalo, New York, originally aired on the TVOntario children's
 [   show, "The Acme School of Stuff".
 [ -- Robbie