< help / Desktop Audio Capture
Desktop Audio Capture uses the Windows audio API called WASAPI. Simply put, as long as applications on your PC are outputting to WASAPI you should be able to capture them with MiniMeters.
Use of ASIO drivers stops MiniMeters from capturing audio of that particular application. MiniMetersServer (included with MiniMeters) allows you to route your audio from your DAW or host to MiniMeters circumventing this.
Linux audio has many options for "loopback" style audio output capture. In my tests on Ubuntu I had no issues simply using Pulse Audio's "Monitor of X interface" feature.