Only moderators would know what I'm talking about
Don't worry, I gotcha. Anyways, I can see where you're coming from, but I don't think it's the best idea. First of all, if it's client side, it'd be hard to manage. Second, as Voidy said, I don't think the VO pitch would work on the other servers.
P. S. If you can find the VO pitches from the character files, then you can find the normal ones and replace those with the normal voice.