Complex sentence: The drumming uses a special "drum skin" adapter designed for the Nintendo DS Lite to map the units face buttons to four drum pads, however this "drum skin" is not compatible with the original Nintendo DS model or the Nintendo DSi.
Split into simpler sentences: The drumming uses a special "drum skin" adapter designed for the Nintendo DS Lite to map the unit's face buttons to four drum pads. However, the peripheral is not compatible with the original Nintendo DS model or the Nintendo DSi.