Is the Duo modded in any way or is it stock? I have heard of issues with it working but never sound issues.
100% untouched US Duo, I purchased new. I have zero issues with any Hucards, or CD games. I tested on a US TG 16 and a PC Engine and all 3 have the issue with the Everdrive. A little static here and there I can live with but it's so bad, I can't turn volume up at all for any games. I have thought about trying different set of roms, just in case, but even without anything on the ED, as soon as I turned the system on, I got static.