The EHX Mono Synth transforms your guitar into eleven great sounding synthesizers... from vintage synth emulations to fat, stacked voices to soaring lead sounds and more. The Mono Synth was designed to work on guitar without any modifications, special pickups or MIDI implementation. Its intuitive layout makes it easy to use and easy to dial in cool sounds quickly. The pedal's DRY dial adjusts the dry guitar volume at the Synth Output while SYNTH controls the volume of the synthesizer sound