Although selling music is a primary purpose of this site, it has useful descriptions about many kinds of music and musical genres, and short biographies of famous musicians. A blog and reviews are also important features on the site.
With its home at Columbia College in Chicago, the Center has built a reputation as a premier research institute for all types and genres of music by African-Americans. This part of their site includes useful guides to styles and genres, bibliographies, and a discography of music by black composers.
The web site for the venerable magazine Down Beat, devoted to jazz. It provides highlights from current issues of the magazine, a link called Education which introduces the subject of jazz to new students.