Music Library: Classical Listening Library

From NML's website:

Naxos Music Library [NML] is the world's largest online classical music library. Currently, it offers streaming access to more than 186,291 CDs with more than 2,864,669 tracks of both standard and rare repertoire. Over 600 new titles are being added to the library each month. 

The contents can be browsed by composer, artist, genre, category and label. User can search with our fast and easy-to-use keyword search engine, or by our sophisticated advanced search engine with up to 14 search criteria. In addition to listening to recordings, NML provides liner notes for many albums. Listeners can create personalized playlists or enjoy our predefined Naxos Music Library playlist. \

Furthermore, a vast array of background information is available. Resources include:

• Over 900 aural training exercises
• Guided Tours on classical music eras.
• Audio book transcriptions about the history of classical music and opera with listening examples.
• Libretti and synopses of over 700 operas.
• A pronunciation guide on composer and artist names as well as musical terms.
• In-depth analyses of selected works.
• Work details with instrumentation, publishers, duration, year of composition and available recordings of the work. 
• Podcasts.
• Interactive music dictionary with music examples and notation.