< 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 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.
Linux audio has many options for "loopback" style audio output capture. For instance, Pulse Audio supports loopback devices which will appear within MiniMeters automatically.
With macOS 13 Ventura apple begun supporting desktop and application audio capture with their ScreenCaptureKit API. This should allow audio capture of all desktop applications.