I have a collection of New Age mood music that I added to Oblivion. I would like to do the same with Skyrim. What program or utility would be required to add music to the game?

Come to think of it, I wouldn't mind getting to girl bards to sing my Loreena McKennitt albums.

Using the CK you can create new tracks, direct them to your music files, then add the tracks to the music types that play in Skyrim. (The various Exploration ones)

The music files themselves will either need to be WAV or XWM format, either is fine.

*Have to be WAV in order to import them into the CK.

There, fixed that for you.

Not true. Have to be WAV for them to appear in the list. You can still type the filename in and just make it XWM instead.