Natural Drive is like an overdrive pedal in reverse. When its off, you get the natural overdrive sound from your guitar/amp combination. When its is engaged, volume is reduced according to the position of the level control. Switch from lead to rhythm and back with the push of the footswitch instead of trying to adjust guitar volume on-the-fly. The Brite pushbutton keeps high frequencies intact at lower volume levels. No more muddy tone from your guitar’s volume control. Perfect for humbuckers played into a classic tube amp.