This is a sound sample of the Peppermill with the clipping stage shut off. The samples are Gain all the way off bridge pu neck pu, Gain at Noon bridge pu neck pu, Gain at full bridge pu neck pu. Then the same order with the boost on.
Story behind the song
This pedal was designed by the fellas at Run Off Groove. Schematic here:http://runoffgroove.com/peppermill.html