ASIO: Unfortunately WASAPI is unable to capture audio from any program that uses ASIO as it's audio driver.
This limitation exists because ASIO bypasses Windows's audio system and connects directly to your sound card or USB audio interface. Some alternative ASIO drivers such as FL Studio ASIO, or ASIO4ALL may still work with MiniMeters.
Use of ASIO drivers prevents MiniMeters from capturing audio of that particular application by sending the audio directly to your interface. MiniMetersServer (included with MiniMeters) allows you to route your audio from your DAW or host to MiniMeters circumventing this.