[ Ref. http://www.mmdigest.com/Gallery/Tech/Scales/Coinola-O.html 

I downloaded the "O" roll tracker bar function graphic from MMD, but
it isn't obvious to me exactly what hole causes the piano to be muted
in the solo section.  Please help.

Thanks,
Dave Vincent

 [ Don Teach wrote in 980403 MMDigest: "All of the original "O" roll
 [ pianos I have seen use the little muffler felt that drops down between
 [ the hammers and the strings whenever the solo instrument is turned on."
 [ http://www.mmdigest.com/archives/Digests/199804/1998.04.03.13.html 
 [ -- Robbie