Hi All,  Here is a good project for those of you trying to read music
rolls of different types.  Lets go all out and use a six-sided spinning
mirror laser assembly from a copier.  Only one pickup would be needed
behind the music roll.  Timing signals would come from the edge of the
paper and the sensor on the spinning mirror assemble.  All we would
need to do is change the software in our computer to allow different
rolls to be read.  This is the same technology used in bar code guns.

John Conrad Kleinbauer
Kleinbauer@Juno.com

 [ Right, and the flying-spot scanner of 1930s television experiments
 [ was the same idea.  The technique is still useful at the supermarket
 [ counter, where the package and/or the clerk is waving in mid-air.
 [ But when the image is constrained in a spoolbox, a video camera on
 [ a tripod is smaller and cheaper for the same results.  -- Robbie