Electro-Harmonix PICO SWELLO – effects pedal

The Pico Swello is a compact yet expressive volume swell generator that creates automatic fade-ins for ambient guitarists and cinematic performers. The pedal simulates violin-like swells by automatically rolling in notes and chords with smoothly adjustable attack times. With the sensitivity and envelope settings, you determine how quickly the swell reacts to your playing, from tight rhythmic pulses to long, lush intros. Thanks to the tone-preserving circuit design, the signal remains clear at all volumes, without the dullness that can occur with manual swells. The Pico format ensures true bypass and a very low noise floor, perfect for subtle ambient rigs. For ambient pads, post-rock crescendos, or soft build-up layers, the Pico Swello delivers natural and musically fluid dynamics.