this is the j.haible frequency shifter (fs-1) – my absolute favorite instrument – yes, it is an instrument by itself, because of it’s feedback paths – no input needed – beautiful warm swirly and just otherworldly sounds, biting rhythmic feedback and myriads of ways to manipulate other sound sources – everything just sounds better being sent through this beautiful device (really!) –  a very intricate build though, I would say the most complex I ever attempted – and I learned many lessons from this one…