Streaming audio services, like Naxos, allow libraries to provide their users with instant access to thousands of music tracks. Naxos Music is a little bit like Rhapsody or Spotify. You can't download any of the tracks from Naxos, but you can listen online, and you can create your own playlists or use the playlists created by your professors. Because the library pays for subscriptions to these services, you can legally listen to tracks or entire albums.
Library Music Source offers you access to music scores that you may download and print out FOR FREE! Library Music Source is a little bit like Sheet Music Plus, but since the library pays for DBU's subscription, you have access to as many free downloads as you want.