From my experience, to do what you want you'd need to run your Mic into a DAW, process it with the Autotune plugin (or a mixer and a hardware Antares Autotune processor) route it back to your mic input or to your software. There's probably a plugin for your MSN messenger or online game to do this easier.
If you have a Mac, GarageBand.
Autotune is a vocal pitch correction plug-in made by Antares. FL Studio owners can add on NewTone, a vocal pitch corrector as an online purchase for FL Studio 9, or buy Autotune and run it as a VST plugin.
You should be able to get software versions for very cheap or even free online.
Download Ateres Autotune online, you can buy it or get a 30 free trial or get it illegally for free. You have to install it as a separate program and it only works with audacity BETA. You will see it in your effects menu when you are done.
What you may be referring to is a voice changing software. You would need to download the program and run it while playing.
Online UPS is a power supply that is not interrupted during the switch-over of the power. There is a short cut-off on the offline UPS which can have an effect on affected loads during transition.
No
Guitars can be tuned quickly and easily by using an online tool such as the Tune-O-Matic. Guitars can also be tuned by buying a guitar tuning machine that listens to the sound of the guitar and tells the user if it is in tune or not.
Mass Effect and Mass Effect 2 are both single player. There are no multiplayer modes
There is neither a co-op mode or online mode for Mass Effect 2
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Yes. This phenomenon is known as the online disinhibition effect. Essentially, being online lowers your inhibitions.