scholarly encyclopedia articles covering classical, opera, jazz, popular music, etc.
composers, performers, conductors, individual works, instruments and notation, forms and genres
Grove Music Online: The New Grove Dictionary of Music and Musicians, The New Grove Dictionary of Opera, and The New Grove Dictionary of Jazz, including updates
Encyclopedia of Popular Music, 4th ed., Colin Larkin, ed.: popular music of all genres and periods from 1900 to the present day, including jazz, country, folk, rap, reggae, techno, musicals, and world music
The Oxford Dictionary of Music, 2nd ed. rev., Michael Kennedy, ed.: 12,500 entries covering musical subjects of all kinds
The Oxford Companion to Music, Alison Latham, ed.: a concentrated focus on the Western classic tradition, from the Middle Ages to the present day
online collection of recorded sound, including folk, popular, classical and world music, speeches, and oral histories, delivered via streaming audio
browse by musical instrument, geographic area, or topic, e.g. American folk traditions, blues, bluegrass and old-time country, American Indian traditions, world traditions (by continent), jazz, classical, spoken word, sound effects.