The best demonstration clips are Kirk's two video clips (worth watching) since he provides amusing voice commentary while providing some examples of the Ensoniq SQ-80 that might soon be working in MAME. Without some form of external artwork showing specific button functions, it will still be a guessing game, but the fact some of the musical equipment out there is/are nearing their life cycles and no longer functioning, these are just as important to being preserved/emulated as best possible just like arcade games.