The Boss Dr. Groove DR-202 is a drum machine capable of recording and playing back sequences and modifying the output sound in real time. The effects section is surprisingly good and filters can be applied to one or all instruments. Reverb/delay/flange depth is programmable per sound as well. It has relatively complete 808/909 kits, 606/707/CR-78 kits and very weird industrial/abstract sounds.
Looking to buy the Boss Dr. Groove DR-202? Check for availability.