@JohnnyApplesauce It doesn't do anything by itself, but I think my favorite is the Morley ABC splitter/combiner. It lets me have 3 separate chains and blend them with a mixer. For my last show I kept one channel dry, second one with compressor (+ envelope filter), third one with fuzz (+ octave). For bass, having the dry channel blended in lets me use fuzz without losing the bottom end and articulation.