You will need an SFPL card and PIN to access many of these resources.
If you don't have one, San Francisco residents can get a temporary digital access card. If you are not a San Francisco resident, email me and I can help you get a digital access card.
Or you can search Alexander Street's audio, video, and reference collections by different musical and performance categories:
African American Music Reference
Classical Music (also Classical Music in Video and Classical Music Reference)