-- forwarded message, please reply to sender and MMD --

Hello, I am not sure if you have seen any really detailed video in
regards to how player piano rolls are created but, so far, this video
I am enclosing the link to is the most concise and impressive video
I have ever seen explaining the procedure:

  Piano roll production at QRS Music
  http://www.youtube.com/watch?v=i3FTaGwfXPM

Richard Winn