Here's some more of the links I used making this project.

Recording Technology History from the Uni of San Diego.

VidiPax - Audio Format Guide is a site for a dubbing service, they list the many kinds of recording mechanisms they have to service. You can see a time line of all recording mechanisms.

Cylinder Recordings is a cylinder educational site with MP3s.

The 78rpm Record Home Page is a home base for all things 78rpm. Including some strange hybrids.

CHARM is the home of serious 78rpm science. They have lots of great detailed information about acoustic recording, dubbing and archiving.

The birth of the 45rpm record down to the very day.

Roll Scanning Information you don't just put a piano roll on the photocopier.

A brief history of player pianos by the local inventor.

Warren's Ragtime MIDI files scanned from piano rolls.

The ARTCRAFT Master roll in progress shows a roll being punched by hand the way Nancarrow did it.

The Power Roll turns any piano into a computer!

Western Electric invented the electrical recording process - at least the winning version.

The Vitaphone project - Vitaphone movie sound on 16 inch 33rpm discs became the basis of the LP. These preceded the 'The Jazz Singer' by many years.

Phonovision - mechanical television recorded to 78rpm records in the 1920's