Multiscan and DblNTSC require an AGA machine, correct? I only have the A500.
No, as long as you have the ECS Denise (can be bought on ebay for under $20, another one of my highly recommended upgrades, along with the 3.1 ROM). Why everyone doesn't upgrade their machines to "the latest and greatest" when components can be had for so cheap, I'm still facepalming about. Sorry, /OT rant over!