Re: Zvex Fuzz Factory
OK, I went back and played with mine in order to give a better answer. I hadn't played with it in a while because of a recent near-death experience involving a Line 6 adapter and I've yet to get around to getting it fixed. Luckily, it still works fine off of batteries thanks to a failsafe diode that blew. I guess this could be seen as another "plus" for this pedal.
Anyway, the most interesting things about this pedal (IMO) are the stab control and the comp control. When I first got it, I didn't really "get" the stab control and just left it full up (though it sounds good this way, I was really missing out on some neat sounds). Rolling the stab control backwards, the pedal begins to self-oscillate when you're not playing. Depending on how little or how much you roll it back, you can get varying pitches. Also, I've found that you can alter the pitch further by messing with your instrument's volume and tone controls as well as any in/out-of phase/parallel/coil-tapping features you might have.
With the comp control at around 3 o'clock or so (depending on whether you're using batteries or the DC-in in the case of the Vexter), you can get some interesting sounds somewhere between an octave pedal and a ring modulator.
Plus, it cleans up very well when you roll back the volume and seems to add a nice, cutting sheen when doing so.