Sit down on the spectrum analysis couch, and let's explain the subtext of this plug-in's name:

  • Frequency: The Fre(a)koscope is a real-time spectral
    analyzer now in beta, a mod of Bram's S(m)exOscope designed to show the
    spectrum of a sound in real-time — so you can dig what's going down in
    your sound, you know, spectrally. (Far out.) And the
    frequencies are labeled with note names, to boot, for those of us who
    forget which frequency spectrum is which.
  • Freaky: Check those multiple views against the orange
    background. Witness the frequency zooming, freeze, peak hold, and the
    ability to mouse over anything for exact amplitude and frequency. This
    is one heavy plug-in. Which is why you may be surprised to learn that
  • Free: Price is free. And you're
  • Free to choose: which platform you want to run, OS X or Win32. (VST on both)

Now go get your freq on.

[Updated] Download and information at FFT Tools @ Smartelectronix (sorry I missed that, gang!)