Voice Communication System in Split Screen Game

Dear Game designers,

I was wondering if there is a way to create a voice communication system that I can use on one computer. I'd like to create this for a split-screen game wherein two players have to cooperate to complete puzzles, however I want to control who can talk when at certain moments.

Ideally it would be something like a Teamspeak server that contains two players wherein I could mute one or another temporarily. This is for a live installation so it is okay to monitor it consistently. The split screen game will be ran from a single computer, therefore the easiest would be to control communication with this machine as well.

I look forward hearing from you, if you have an alternative solution, please don't hesitate to propose them.

Kind Regards,

Nikki