This is a unit I put together to solve a signal routing problem on my pedal board. This handy little mixer unit allows me to run my delay line independently from the rest of my pedals, so I can switch out of my delay without losing my repeats. It's a 2 channel adaptation of the usually 4-channel active mixer project from General Guitar Gadgets. The graphic is taken from the cover for Noise Machine by Norwegian metal band, Musth. I'll probably end up building another unit to do this job, one that has reverb in it. We shall see.