In the United States, no sound recording will enter the public domain until 2067, unless explicitly placed into the public domain by its creators.
There are however many streaming and download services where licensing fees have been paid by the host of the content. See Streaming Music for a selected list of streaming and download services. See also Royalty Free Music, Loops and Sound Effects.
For more information regarding Public Domain music, see PDI Info (Public Domain Information Project)
Archive.org (audio and live music) Includes the Grateful Dead live audience and soundboard archives.
UCSB Cylinder Audio Archive The University of California Santa Barbara Library, with funding from the Institute of Museum and Library Services, the Grammy Foundation, and donors, has created a digital collection of more than 10,000 cylinder recordings held by the Department of Special Collections. To bring these recordings to a wider audience, the Library makes them available to download or stream online for free.
Milken Archive of Jewish Music: more than 700 recorded works, including over 500 world premiere recordings. Sound clips available. Full tracks available for purchase.
Afrocentric voices Radio: Historic and contemporary African American singers and composers of Classical vocal music.
New Orleans Independent Music Digital Collection: This project seeks to collect, preserve, and provide access to this rich heritage by creating a platform in the digital environment that allows visitors to learn not only about local indie bands but also about the individual artists and the web of relationships that underlie the local New Orleans musical culture.
Belfer Cylinders Digital Collection: provides online access to digital audio files of cylinders which includes over 22,000 cylinders, 12,000 of which are unique titles. The digital recordings, provided in both MP3 and WAV file format, can be searched or browsed by genre/subject.
CHARM: AHRC Research Centre for the History and Analysis of Recorded Music (CHARM) – Kings College London. Approximately 5000 sound files are available via the Find Sound Files facility. Copyright information.
Spirituals database: offers searchable access to recorded track information for over 4,500 Negro Spiritual settings performed by solo Classical vocalists. The resource contains a selection from a century of historic and contemporary recordings produced on compact discs, long-playing (33 1/3 rpm) albums, 78 rpm records, 45 rpm discs, audio cassettes and streamed digital files, as well as demonstration recordings from musical score collections of Spirituals.
Boston Public Library Great 78 Archive: The Great 78 Project is a community project for the preservation, research and discovery of 78rpm records.