While music is an important part to any documentary, it can be difficult to find free (and legal) music to download. Here are a few sites which have public domain music and sounds that you can download for free.
|Musopen allows you to download public domain music. You can browse their collection by composer, performer, instrument, period, and form. Sheet Music is also available.|
|Cylinder Preservation and Digitization Project, which is available from the Department of Special Collections at the University of California – Santa Barbara, provides free access to public domain music.|
|The Recorded Sound Reference Center provides access to some of
the Library of Congress’ public domain music.