heard an interview this morning with a man from the University of California, Santa Barbara Library, about a project they are working on, to restore and digitize cylinder recordings
the link below is to the project website, there are over 6000 recordings already in the collection and most if not all are available for download.
thought you might enjoy this
Catalog of Cylinder Recordings
at the home page click on browse collection, from the next page you can search for specific items or simply browse through the collection, clicking the first column (#), brings up detailed information on the specific track, as well as the download links