Ability to simulate loudspeakers?

For a stage I am working on I was looking into putting a camera in Red spawn to broadcast to a monitor to a computer control room (where the first cap point is).

The purpose would be so that during the 60 second set up time Red could broadcast taunts via video to Blu. You know to give the attacking team something to do during the set up as well.

So I find out cameras are borked in TF2.

So next step is audio. Is there a way to say if a voice file for a character is used in an area it would broadcast in the control room?

Thanks- I dug around the net a little bit. I might be able to make it work.

http://www.editlife.net/entity.php?name=env_microphone

Entity- env_microphone

Description- An entity that will either measure the sound level of a particular entity (and fire an output when the sound level changes), or route all sounds it hears through an env_speaker.

Flags
"Hears combat sounds"
- "Hears world sounds"
- "Hears player sounds"
- "Hears bullet impacts"
- "Swallows sounds routed through speakers"
- "Hears explosions"

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