Ever imagine how you could play an audio music with full music instrument in an NES? Sergio Elisondo released the very first cartridge album with full music device for the NES. It is a challenging project since a cartridge has limited storage. To overcome this limitation, he collaborates with RetroUSB. RetroUSB has created a custom cartridge which able to store the custom ROM. MetalJesusRocks has invited him to explain more about his project and how you could get one of its kind.