Hi thank you so so much for this as you are only 1 person who has replied so its most appreciated. I cant have High Gain Red, as I have a LINE 6 spider IV 15 amp and there is no gain knob, but I do have this foot pedal, a digitech screamin blues, http://digitech.com/en/products/screamin-blues
Also I have on my amp 4 buttons, as you can see in picture clean, crunch, metal and insane, so which button do i set it on. also what about chan vol knob