The Japanese version of the Sega Master System offers both PSG sound and FM synthesis sound for several games. Many USA and European games have FM sound, but this functionality was not included in those consoles. Upgrade your SMS by installing a FM Sound Expansion board by Tim Worthington. This board is compatible with the Model 1 and Model 2 versions of the SMS.
The FM Sound Expansion board can be purchased here.
NOTE - This is a modification service and it requires the customer to ship their console to us. This is not a finished product you are purchasing. If you are interested in purchasing a finished system please check our "Pre-Modded Consoles" category or contact us!