I've been looking for something which will give me an octave above what I'm playing for a very long time now. The device needs to track a five-string all the way down (maybe even to an A below bottom B) without choking. I've tried a number of boxes recommended to me by friends, and the only thing that would do it was an Eventide product that cost more than my car. That was almost ten years ago, and it occurred to me the other day that miniaturization should have caught up with this by now, so have started looking again. I picked up an ElectroHarmonix POG, the big one with the sliders, and granted I haven't had time to fiddle much with it, but I can't seem to get just one voice out of it-- it's like everything is all the way up all the time. I'll work with it some more this weekend, but is there anything else out there?? I don't need an octave down, or boost, or fuzz or any of that happy crap-- just one nice clear octave above what I'm playing. Is there any hope?