The Electro-Harmonix Soul POG Multi-Effects Guitar Pedal combines the transparent Soul Food overdrive with the Nano POG polyphonic octave generator. This pedal combines two sweet pedals - the Soul Food transparent overdrive and Nano POG polyphonic octave generator - in one potent multi-effect. Use them alone or together, put either first in the chain, and insert other pedals between them with the FX loop. Also includes a cool Mode switch for a choice of two different octave-up sounds. The versatile EHX Soul POG delivers award-winning overdrive and flawless polyphonic octaves in any combination. MODE SwitchThe MODE switch changes how the UP OCTAVE responds to your playing.DRY KnobControls the output volume of the DRY signal at the EFFECT OUT jack.SUB OCTAVE KnobControls the output volume of the SUB OCTAVE signal.OCTAVE UP KnobControls the output volume of the OCTAVE UP signal.VOL KnobSets the output level of the Soul Food section of the Soul POG.TREBLE KnobActs as a tone control.DRIVE KnobControls the mount of input gain.DRY OUT JackThis 1/4-inch jack outputs a buffered version of the input signal.RETURN JackThis 1/4-inch jack must be used in conjunction with the SEND jack.EFFECT OUT JackThis 1/4-inch jack is the audio output from the Soul POG.SEND JackThis 1/4-inch jack can be used to put effects in the signal path between the Soul Food and Nano POG to expand its sonic capabilities.INPUT JackThis 1/4-inch jack is the audio input for the Soul POG.EFFECT ORDER SwitchThis toggle switch, located in the middle of the Soul POG, selects which effect is first in the signal chain.POG Footswitch and LEDThe POG footswitch selects whether the Nano POG is engaged or in buffered bypass.SOUL FOOD Footswitch and LEDThe SOUL FOOD footswitch selects whether the Soul Food section is engaged or in bypass mode.