Caja 1.4 is missing the media properties tab. I've installed Thunar and thunar-media-tags-plugin and this provides the functionality, but with a clunky interface. With Thunar, I can right-click a file and choose the audio tab, but thre is nothing useful there other than the properties button. Clicking properties provides one with actual audio properties.
I saw a suggestion that installing nautilus might be an alternative, but it looks like that causes zeitgeist to also be installed, which is not something that belongs on a supposedly lean, supposedly somewhat secure desktop.