[moosedev]

The earliest I've used was Protracker, which was the most popular tracker in the early heyday of the format (late 80s - early 90s), but the earlier Soundtracker was the OG "tracker", and probably used the same layout, but I'm not sure. https://www.exotica.org.uk/wiki/Soundtracker_History

But if FL Studio (formerly FruityLoops) and Renoise use the same layout, as others have said, then those are probably going to resonate with a wider modern audience :D Or maybe just call it "FL Studio / Renoise / tracker layout"?

I don't do computer keyboard note entry any more, but I still have the muscle memory for that 4-row layout from hours spent with it in the late 90s :D And I'd totally use it in your game. (My MIDI keyboards are kinda too far away from the mouse and monitor.)