Digitech DDM Death Metal Analog Distortion Pedal Level boosts the output level of your guitar signal. Low adjusts boost and cut of bass frequencies. High adjusts boost and cut of upper harmonics. Mid adjusts boost and cut of midrange frequencies. High adjusts boost and cut of high frequencies. Dual Outputs. The Amp output is for connecting directly to a guitar amplifier. The Mixer output features Cabinet Emulation circuitry for connecting directly to a mixing board or recording device.