On-demand streaming access to CD-quality audio (192kbps Mp4), complete original liner notes and essays from independent record labels and sound archives.

Music Online is an online music resource that cross-searches all of the Alexander Street Press individual audio databases: American Song; Classical Music Library; Contemporary World Music; Jazz Music Library; Popular Music Library; Smithsonian Global Sound; Music Periodicals of the 19th Century; Classical Music Reference Library; and Classical Scores Library.

This audio database includes opera libretti and synopsis.

The Metropolitan Opera's streaming audio and video
database with access to more than 500 Met performances.
Newest performances are in HD;
oldest performances are audio only.

Searchable database
of recorded vocal
masterclasses.