Hidden gem: TECH21 TRI-O.D. This pedal can produce three different tones: Clean, Rhythm, and Lead, with channel switching. Unused channels can be skipped by turning them OFF. Example: Clean to Lead, Lead to Rhythm. It can also be used as a speaker simulator. I used to connect it before my multi-effects unit. I still want to use it, but I'm selling it to organize my gear. Ken Yokoyama also seems to be a fan of this effector.