I own a BOSS CE-5 Chorus and am trying to better understand the filter knob. I've read the manual and basically all it says is to turn the knob clockwise to increase the output band (same instruction for high and low). What does that mean in layman's terms? Does it mean that as I turn the knob clockwise, more of that frequency will be impacted by the effect (affected by the effect)? If I have both of the knobs set at flat does that mean that the effect impacts both frequencies in their broadest range/scope? I'm puzzled.