Hi Chris. On my wk8 I run a dynamic microphone into the mic/line input. When I turn off the vocal harmonizer and speak or sing at the same level as when the harmonizer is on I get a clipping sound. When I turn the harmonizer back on it goes away. This seems odd to me. It does not matter what function I have activated on the harmonizer, chord, unison or vocoder. When I shut off the harmonizer it sounds like I'm overloading the mic input. I've even tried different mics. Any thoughts ?