Here is an early video look at a Roland TR-606 drum machine with some custom mods that turn it into a TR-608.

“In which I show the “TR-608″ mod by Filippo Samoré, who crammed all the mods you can do into my humble 606. The mod is high-quality and truly enhances the sound engine of the 606 without compromising its handy form factor. It is almost like a TR-808 now, except maybe a little more interesting, because it is still a charmingly shuffling 606 at its core.”