Lots of nice archive footage and pics in here, including an interview with Bill Hemsath, the engineer who built the original. Most interesting fact: he puts the unique sound of the Minimoog down to the fact that a miscalculation by a colleague caused the filter to be overdriven by 10-15% and that he avoid the 'horrible sounding' integrated chips of the day, and used discrete transistors instead. (I guess that would also make them easier to maintain to this day than other manufacturer's machines, such as the notoriously hard to keep going Oberheims that used ex-military chips which are completely unavailable these days)