Sync your modulation rate on-the-fly with the Source Audio Toolbox External Tap Tempo Switch. The Tap Tempo Switch is compatible with all Source Audio One Series modulation pedals. Use it to tap out the LFO speed of the Vertigo Tremolo, Lunar Phaser, Gemini Chorus, and Mercury Flanger. The Speed knob on each pedal sets the beat division to quarter, eighth, triplets, or 16th notes. South of 9 o’clock on the SPEED knob of Source Audio One Series Pedals will give you quarter note beat divisions, 9 to 12 o’clock gives you eighth notes, 12 to 3 gives you triplets, and 3 to 5 gives you 16th notes. The Tap Tempo Switch will also set the Delay Time or externally recall presets on the One Series Nemesis Delay. 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)).