I have Audacity (3.7.1) and noticed it has a MIDI option. Unfortunately I can't get any response with my (Roland A-800 Pro) MIDI controller. The MIDI-controller works fine in Logic Pro X or other MIDI related apps.
So either I've misconfigured it in Audacity (hard to do as there aren't many MIDI options), or I've misunderstood how to use it in Audacity (I assumed it would allow me to play back any audio present in the editor, using the MIDI keyboard).
So either I've misconfigured it in Audacity (hard to do as there aren't many MIDI options), or I've misunderstood how to use it in Audacity (I assumed it would allow me to play back any audio present in the editor, using the MIDI keyboard).