Spectral analysis

I have some pieces that I recorded a capella with no reference to any 12tet.
I'd like to see what frequencies and harmonies I sang. They are available
on http://www.mp3.com/chaosmonkey

Joe Monzo mentioned to me that there was a freeware version of software that
could do a spectogram analysis... any help we be very welcome.

Music, Magick, and Sex.
Alex J. Van Wey
Azi Vajravai
Chaos Monkey