You may have heard that the Musical Instrument Digital Interface protocol (aka MIDI) celebrates its 30th birthday this year. And where better than NAMM would the MIDI Manufacturer Association be able to fully demonstrate (and celebrate) the persevering protocol's coming of age? Part of the MMA's installation was a set-up destined to get geek hearts racing. A 1983 Commodore 64 connected to a Sequential Circuits Model 64 sequencer cartridge (with MIDI interface)