MOTM

Not sure if I spelled that right.  Ok, who knows a decent software-
based spectrum analyzer?  I'd like one with the ability to show 
various frequencies, but a *really* neat feature is the "scrolling 
voiceprint" thing that some software (and hardware) spectrum 
analyzers have (even the one with winamp has that)

I'm not ready to shell out big bucks for a hardware one, so does 
anyone know of one?  I'd prefer Win-doze based, but if it's *nix, I'd 
even set up a machine for it.

BTW, I've alraedy got an oscilliscope, but it's a miserable old 
heathkit.  =]

I'd just love to be able to see what's happening with my various 
gear, esp. once my MOTM setup grows.

-Geoff