Questions to Julian Dyer [180610 MMDigest].  I see that the
simulated yellow perforations in your video are the notes but
could you explain for us what the light green, orange, and
red perforations are.

I have this roll in Licensee format and play it on my 5'4"
scale 32 Chas. M. Stieff Welte piano.

Thank you kindly,
Allen E. Ford