A nice little find for Dead Heads: The Internet Archive hosts a large collection of the Grateful Dead’s live music. Some concerts (usually recorded by members of the audience) can be downloaded. Other audio (usually taken from the soundboard) can be streamed. You can access the overall collection here.
A few items worth sampling include: Live at the Boston Garden (May 7, 1977); Live at the Dane County Coliseum (February 15, 1973); or Live at Madison Square Garden (September 4, 1979).
Enjoy.
looking for audio or video or both of black buddy river from July 9th 1979