Audio Circuit (PC Engine Duo) Updated Mar 15, 2026 · 43 min read · 0 viewing Log in or register to read the full article. Previous RGB Video Output (PC Engine Duo) It is common to install an 8-DIN Mega Drive 1 / Genesis 1 AV port on the PC Engine / Duo / Duo-R and... Next Laser Tuning (PC Engine Duo) The PC Engine Duo can be tuned with many potentiometers. Setting them strategically and in order i...