You have to go inside the library's atrium to appreciate the effect of the dome over it. This amazing space has remarkable acoustics which are utilized in frequent concerts (often at noon on Fridays during the school year).
Downstairs off the ground floor level of the atrium you'll find Media Materials & Reserves, where among other things you can check out CDs and movies on videotape and DVD. To browse the feature film collection search for "feature films" in the Subject field of Griffin. You can search for music on CD by using Griffin, or my own database, which provides more searching options.