Because I have someone who wants to hear these, and because I really think everyone needs to know how cute and unique fox noises really are, here's a slew of videos! XD
Most of these I found during my research on the red fox, but some of these are just plain adorable.
Click to view
This is a territory guard call. Don't have your sound turned up too loud - this is a bit surprising for most people.
Kevie the red fox 'singing':
http://www.youtube.com/watch?v=d3uJMOWZOMkReally cute, and a unique chitter.
Kevie with some more anxious/excited chitters:
http://www.youtube.com/watch?v=GTZnQNv7nBk Kevie chittering similar to the second video, but a little more awake:
http://www.youtube.com/watch?v=w0kO_e7JnSk Kevie meowing. Turn your volume up, she's really quiet:
http://www.youtube.com/watch?v=Max6t_abF9E Fox 'howls':
http://www.youtube.com/watch?v=ZO1IdkoMMMs A series of barks from different ages:
http://www.youtube.com/watch?v=UxLHUxzEoRU