A Raspberry Pi that transmits your TV's audio into Discord.
On Github: https://github.com/chandwki/Discord-Jack
I live with computer geeks and gamers. We all have our computers set up in a finished basement that we call the LAN Cave. I mounted a TV on the wall so that we could chromecast things to have on in the background.
The problem was not everyone always wanted to hear the TV. If you're gaming with your headphones on the TV would have to be too loud to hear anyway. I solved this with a Raspberry Pi, a USB sound card (with stereo audio capture), and a simple discord bot.
The discord bot Discord-Jack uses discord.js and mic. Because this app requires Node 8 a newer ARMv7 or ARMv8 Raspberry Pi is required such as the Pi 2 or 3. I used a "Griffin Technology iMic USB Audio Interface" which works out of the box with the Raspberry Pi. It does stereo audio capture which you don't get with some of the cheaper USB sound cards.
The whole setup works surprisingly well. Each person can control the local volume of the discord bot to their liking or just mute it. My biggest concern going in to this was latency. If you are really paying attention to lips you might notice a slight delay. However, because Discord is meant for near real time communication, the latency really isn't too bad.