I know there's one that exist here:
http://forums.alliedmods.net/showthread.php?p=648899
But it's written more for alltalk to be turned off. It can be set for alltalk to be on but then people cannot mute players in game which can be very annoying leading them to do a votemute which doesn't always work. We use alltalk all the time on our servers and whenever you wish to have some strategy your left with typeing which can be annoying. So if someone can make a plugin similar to the one above where you just bind a key to use team voice chat and players will still be able to must someone in game using the menu that would be amazing.
I've posted on that topic above but I don't think the creator is around anymore.
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