Oxford Music Online Always a good starting point. Access to Grove Music Online, the Oxford Dictionary of Music, the Encyclopedia of Popular Music, and the Oxford Companion to Music.. The New Grove Dictionary of Music is also in Reference and the PARC, ML100 .N48 2001.
Garland Encyclopedia of World Music Comprehensive overview of musical traditions worldwide. Also in Reference and the PARC, ML100 .G16 1998.
Encyclopedia of World Cultures Each volume is dedicated to a different region of the world; good for ethnomusicology. Reference, GN307.E53 1991
Continuum Encyclopedia of Popular Music of the World See volume 3 for information by country; volume 2 includes information re. ensembles, techniques, instruments, etc.
v. 1. Media, industry and society -- v. 2. Performance and production -- v. 3. Locations
Oxford Bibliographies Online: Music Comprehensive and frequently updated bibliographies for a variety of topics relevant to music research.
Oxford Reference Online for Music Quick source for basic information about classical music, musical theatre, dance and theatre.
Cambridge Companions Online Full text access to "Cambridge companion to. . ." books in music, as well as literature, classics, philosophy, religion, and culture.
Alan Lomax Archive Online access to materials from the archives of folklorist and ethnomusicologist Alan Lomax, including rare and unique sound recordings, videos, and photographs.
Classical Music Library Streaming audio, primarily classical music. Also available through Music Online.
DRAM Streaming audio. Good for hard-to-locate, contemporary American music. Albums from New World Records, other independent labels and archival sources.
medici.tv Streaming video for prerecorded musical productions, plus access to 100 live performances per year.
Met Opera on Demand Met Opera on Demand: Student Access offers users instant access to more than 475 full-length Met performances, including stunning HD videos from the Met’s award-winning Live in HD series of movie theater transmissions, classic telecasts from the 1970s, ‘80s, and ‘90s, and hundreds of radio broadcasts dating back to 1935.
Music Online Streaming audio in a variety of genres including classical, jazz, folk and world music.
Naxos Music Library Streaming audio. Complete catalogue of Naxos, Marco Polo and Da Capo labels, as well as selections from many other labels. Primarily classical music, also world, folk, and other genres.
Naxos Music Library Jazz Access over 3,800 jazz albums, from Naxos Jazz and the Fantasy Jazz labels.
Smithsonian Global Sound Recordings from the Smithsonian Folkways Recordings label, as well as Folkways Records, Paredon, and other labels. Primarily world music and folk music; includes field recordings.