I love the sound of my Mini Q-Tron and use it with guitar, bass and saxophone (with a mic). However, I experienced a noticeable volume boost when activating the pedal whilst connected to a mic, which often gave rise to feedback problems. The answer- add a volume pot to work on the treated signal. The trouble was, nobody I spoke to was willing to have a go at it. Various solutions, usually involving a volume pedal were suggested. The Answer- Buy an Ibanez AW 7. It’s the only auto wah with a volume knob on it that I have seen.