I'm aware this was previously a topic, but it gives me an error message when I try open that page.
So on CS:S you can bind voice commands by typing something like this in console: bind v "gogo"
Resulting in the Radio message 'Go go go!' to be played when pressing 'v'.
I'm sure it's the same in PVKII, but sadly, it's not as popular as CS:S, so I haven't yet found a full list of voice commands for binding in console.
Could someone who knows them please post them here? Or if you can access Turtle's topic on here
and fill me in.