[ Ref. 010407 MMD, Orphenion 13.5" Music Box Discs ]

The crinkles in the discs probably cause most of this, but I do have
a suggestion: take a candle and rub it on the bottom of the disk along
the area where the holes are, sort of in a circle in line with the
holes so some of the wax is deposited on the edge of each hole.
Sometimes this will allow them to slip over the nubs in the drive wheel
enough to eliminate the noise.

Craig Smith