https://en.wikipedia.org/wiki/Sampler_(musical_instrument)Oh is that where you can plug an instrument and it generates a midi file based on you playing? I remember being a lot into midi files before, there's this program called Anvil Studio and I used to make music from scratch in it. I'd have to mess around with that again, I bet Linux has lot of nice programs too.
Was also fun to take midi files and import into Orion or other similar programs.