What data can be transmitted to the V5 Controller

I have noticed that updates to the code could be transmitted to the robot, as well as the controller connected to vex net. After looking a bit into the new vex net system, I was wondering what info is transmitted to the controller during matches, and how I could use it.
Ex: probably impossible, but bluetooth audio digitally to the controller and then to Bluetooth speakers. Similar to the PS4 controller with an audio port.
Thanks.

The controller has very little bandwith; little more than a stream of characters can be transmitted to the controller.

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