I found an intriguing book at the local library.  It is called "Making
More Wooden Mechanical Models", by Alan and Gill Bridgewater (Popular
Woodworking Books, 2000).  The book shows how to make mechanical models
-- out of wood!  It's not mechanical music but the principles of making
wooden gears and other mechanisms may be applied to some mechanical
music machines.

I have scanned the cover.  The URL is:

   http://mmd.foxtail.com/Exchange/woodmach.jpg

The three models shown on the cover are, from left to right:  a film
advancing mechanism, the Wonderful Wilmhurst Machine, and a six valve
radial engine.  Other models in the book include:

  Steam crank slider mechanism
  Differential pulley block
  Excentric squirrel fan
  Wheel and worm gear mechanism
  Universal joint
  Camshaft valve
  Water life pump
  Lever and ratchet mechanism
  Screw jack
  Bicycle chain machine

The web site for the publisher is:

   http://www.popularwoodworking.com

Standard disclaimer applies.

Joyce Brite
Player Piano and Mechanical Music Exchange
http://mmd.foxtail.com/Exchange/