1. How Do I turn the noise get off? When I turn the gate on is itt just for the selected channel or for all them?

2. There is an extra distortion effect, that gets turned just like the noise gate,but how can I tell if its on or not? How do i turn it off?

3.How does the channel volume work? They say its so you can match your channel volumes,but when I turned the knob it seriously affected the tone?
I read the manual it does not say how to turn off the noise gate or the extra distortion.