Flash lights on Google Home Broadcast

I like to listen to music with my headphones on, and tend to miss broadcasts from my wife on our Google Home. I’d love to flash the lights when a broadcast is received.

Is there a way to detect when a broadcast occurs?

what do you connect your headphones to?

Typically a computer, or my phone, but thinking more broadly, this would be a great feature for my mom to get my dad’s attention, who’s just plain half-deaf. I was surprised I didn’t find something for this when I searched!