I've recently played the beta for Insurgency Sandstorm on Xbox and I have a suggestion for how you could control Radio/Proximity chat.

On console, you press Left Bumper for radio and proximity is always open mic. I don't like an open mic for any game.

So here is my suggestion: To activate proximity chat press and hold the Left bumper. To activate Radio+Proximity chat double press Left Bumper. I think this is an ideal way of separating Radio and Proximity chat without using another button.

Another solution would be to allow players to set proximity to push to talk and bind it to another button. Players with Xbox elite controllers, for example, could take advantage of this by binding proximity to one of their pedals on the rear side of the controller.

Thank you for reading and please share your thoughts if you have any.