The Source Audio Tap Tempo Switch is a simple footswitch that adds significant functionality to every One Series pedal in the Source Audio collection. It offers on-the-fly tap tempo control over modulation rates for the Vertigo Tremolo, Lunar Phaser, Gemini Chorus, and Mercury Flanger as well as delay times for the Nemesis Delay. The Tap Tempo also makes it possible to externally scroll through presets on the Nemesis Delay, toggle between distortion engines on the L.A. Lady Overdrive, Kingmaker Fuzz, and AfterShock Bass Distortion, or render virtual knob changes to every One Series pedal. In addition, the Switch has a standard 1/4" output for use with compatible third-party products (normally open [NO], single pull/single throw (SPST)).