Looking to find information on how to tap in to FM sound when playing SMS games both physical (master gear converter) and off Everdrive GG on the Game Gear. Google and forum searches didn't have any results. Talking with Tim Worthington, he has said some have accomplished this with his mod - but he didn't have anything further to add. Thank you in advance for any information or links you may have.
Tim gives some details in this thread. http://www.smspower.org/forums/10841-SMSFMSoundExpansionBoardsAvailableNow?start=150
How funny, he said he has done it. When I asked directly he said he heard of some doing it but couldn't tell me how. :\