Does anyone know of where I could find a tutorial on how to modulate a voice to sound electronic, similar to what is in the below video?
I’ve been Google-ing for a bit and all I can find are tutorials that tell you how to change the pitch and timber of a voice.
Is the effect I’m looking for some sort of ring modulation at a specific frequency or something?
The software packages that I have available to me are Audacity and Adobe Soundbooth CS4.
I think this is related to what’s been called the T-Pain effect, which essentially is autotune.
If googling around for this I’d look for things like T-Pain effect, autotune (which can be gotten as a VST plugin (either the real one, or there’s one called Gsnap which is similar), which you can get to work with audacity), and you might be able to get similar things with a Vocoder (though I think that’s generally for modulating a signal with much higher harmonic content which will give you a more “roboty” sound).
Gsnap:
http://www.gvst.co.uk/gsnap.htm
I’m more into the technical side, though, so I could be wrong about what effects these are exactly.
Ring Modulation is a completely differant effect achieved through differant means. T-Pain uses an automatic vocoder. You can buy a nice little keyboard vocoder (Korg Mini) for 450 (US dollars).
Ring Modulation; however can be added after the fact to get a double tune sound. I love talking about music gear, someone ask another question please.
peace,
-nick
Edit: man, forTe beat me. 
Anything for mac ?
Sweet, thanks.
Soundbooth is a task-based program that doesn’t support VST, and Audacity doesn’t really have good support for VST plugins, so I downloaded the Kristal audio engine software.
The AutoTune plug-in works very well, but it’s only a ten day trial of the paid version. Gsnap gives a similar effect, but so far I haven’t been able to get it to sound as good as the AutoTune results.
<OT rant>For 1.7 G’s, you’d think that the Adobe CS4 Suite would include something better than Soundbooth, like Audition.:mad:</OT rant>
Audacity works on mac… Not sure about VST and Audacity on mac though.
Garageband, does however, have an autotune feature (if you add a real instrument track and use the “enhance pitch” feature). Just google Garageband autotune if you want more info. It should be noted that you likely won’t have the “make it sing feature” where you could possibly use a MIDI track to feed audio data to the plugin to get autotune to a certain pitch (determined by you) very easily. You’ll have to sing somewhat close to on key 
Though I’m sure if you want to shell out for ProTools, Audition, etc. then you may have some more options.