You may listen to music online (not download it) using the following resources:
If you find something you like on Naxos or Music Online, you won't be able to download it, but you have a couple of cheap or free options.
1) Find the work on Amazon or iTunes and buy only the track you need.
2) See if the Music Library has a CD copy of the track you need by searching the Library Catalog.
3) Use the free Naxos app (iOS & Android) on your phone or tablet to play the track.
To use the app, you will need to set up an account in Naxos using the Library's subscription version. It will only take about three minutes. See the video for how to set up a Naxos account