Mac OS X: If you're in need of a simple way to monitor audio inputs on your Mac, Apple's Developer Tools includes Audio Monitor to handle that specific task. While this is certainly a niche tool, ...

Couldn't nail down the right keywords to Google, so here we are. I have a monitor (Alienware AW2721D) with 3 inputs: DP + 2x HDMI. I have the following connected: 1. PC on DP single monitor setup 2.