Historic Recordings On-line:

Library of Congress:

• National Jukebox 
• Inventing Entertainment: the Early Motion Pictures and Sound Recordings of the Edison Companies
• Emile Berliner and the Birth of the Recording Industry
• Ragtime
• American Leaders Speak: Recordings from World War I and the 1920 Election

National Library of Canada:  

• The Virtual Gramophone

University of California at Santa Barbara:

• Cylinder Preservation and Digitization Project

WFMU:

• "Thomas Edison's Attic" radio program
• "Antique Phonograph Music" radio program