It would be interesting to see experimental audio-only upgrades of classic games to probe how much impact can be made there, given essentially unlimited quality and diversity. Would a dynamic music soundtrack improve Pac-Man to an unbiased tester?
Hi John! Depending on the game, this would be relatively trivial to do using MAME. Quite a number of arcade titles had an entirely separate CPU for managing audio, accepting commands through a simple latch. Hook up your own code to poll the latch for commands, profit.
