I am an amateur radio operator and my primary radio is a Software Defined Radio. It does not have any physical knobs and buttons. Instead it is completely controlled via a Macintosh application. I much prefer physical knobs and buttons.
I use KM to interface with a repurposed midi DJ controller to change my radio's settings.
Here are some examples of it in use. The grey box in the lower center of the photos is displayed to show the new setting whenever I modify one of the radios's settings using the midi controller.
Tuning
Selecting an antenna for receiving
Changing the bandwith of the received signal