Do any of you stay awake at night agonizing over how the keytar could get even cooler? The 80s are over, so we know none of us do. Yet here we are, [James Cochrane] has gone out and turned a HP ...

This hack is a “re-braining” of a RK-100 Korg Keytar, replacing the original circuits ... powered by the played musical frequencies for a unique phasing effect. That has understandable ...