Electro-Harmonix Pico Swello Attack Envelope Filter Pedal

Based on the Attack slider from the POG2, the Electro-Harmonix Pico Swello is a polyphonic attack envelope FX pedal that allows you to produce volume swells for each note played. Combined with a selectable onboard low-pass filter, the Pico Swello can be used to create unique sounds and highly expressive passages, all in a compact Pico-sized enclosure.