Electro Harmonix Pico Swello Polyphonic Attack Envelope Pedal

Retailing in the region of £151.99

The Electro Guitar Pedals always come out on top. This is New is in stock and ready to post out to you, with fast, reliable delivery straight to your door. For more New Guitar Pedals options, read on for full specifications, demos, and secure online ordering. One of Electro-Harmonix’s most popular effects, there are many reasons to love the POG2. One major reason is its unique attack filter, applying attack envelopes to each individual note played, whether in single notes or in a chord. This creates a very musical, multi-voice effect that’s extremely adaptive to any musical style. This polyphonic…

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Description

The Electro Guitar Pedals always come out on top. This is New is in stock and ready to post out to you, with fast, reliable delivery straight to your door. For more New Guitar Pedals options, read on for full specifications, demos, and secure online ordering.

One of Electro-Harmonix’s most popular effects, there are many reasons to love the POG2. One major reason is its unique attack filter, applying attack envelopes to each individual note played, whether in single notes or in a chord. This creates a very musical, multi-voice effect that’s extremely adaptive to any musical style. This polyphonic attack filter is the core of the PICO Swello, generating polyphonic and reverse sounds with the addition of a modulated low-pass filter for even more expressive tones.

Implemented subtly, the Swello adjusts your guitar’s attack to sound smooth and flowing even while playing fast lines and arpeggios. Lying on the effect more heavily creates dramatic swells perfect for shaping gently shifting ambient soundscapes and synth-style pads.

Key Features

  • Compact Pico chassis
  • Attack Envelope effect of the EHX POG2
  • Polyphonic attack envelope applies swell to each individual note played

Controls

  • VOL – adjusts overall output volume
  • ATTACK – adjusts ATTACK Envelope Time
  • FILTER – button engages LPF and selects resonance settings
  • FREQ – sets cutoff frequency of LPF

MOD controls depth and direction of filter modulation Power adapter included

The simple 4-knob control layout is easy to drive, starting with the heart of the pedal, the ATTACK knob. Turn up ATTACK to go from a quick, gentle attack time to slow, long swells. VOL controls the overall output and is useful for making up for the perceived low volume of long attack effects. The rest of the controls apply to the Low-Pass Filter. The Filter Button engages the LPF with adjustable low and high resonance settings. The FREQ control adjusts the cutoff frequency of the LPF. The MOD knob controls the depth and direction of the LPF envelope for upward or downward filter sweeps over a narrow or wide range of frequencies limited by the cutoff frequency. The LPF’s modulation timing is tied directly to the ATTACK knob setting. Combining the LPF with the Attack Envelope brings added musicality and expressiveness to fan-favourite effect, now in its very own pedal.

Specifications

  • Circuit: Digital
  • Bypass: Buffered Bypass
  • Audio: Mono
  • Power Supply: 9.6VDC-200mA power adapter included
  • Dimensions (in): 3.65 x 2.0 x 2.0
  • Current Draw: 100mA

Additional information

Weight 0.5 kg

About the manufacturer

Electro Harmonix

Electro-Harmonix, often known as EHX, is a pioneering effects pedal company from New York that helped shape the sound of modern music. Founded by Mike Matthews in 1968, the brand became legendary for its bold innovation and unmistakable tones. Classics like the Big Muff Pi, Memory Man, and Small Clone have defined the sound of rock, punk, and alternative music for decades. Known for their rugged build, distinctive character, and experimental edge, Electro-Harmonix pedals encourage creativity and individuality. From vintage warmth to wild sonic textures, EHX remains a favourite among players who love pushing boundaries and crafting unique sounds.

More info about this Product

Guitar Pedals

Guitar pedals are compact effects units that shape and enhance a guitar’s sound, sitting between the instrument and the amplifier. They include gain pedals like overdrive and distortion, modulation effects such as chorus and tremolo, time-based effects like delay and reverb, and essential utilities including tuners, compressors and loopers. Understanding basic things such as pedal type, signal order, power requirements and intended use helps players choose pedals that suit their style, setup and playing environment.

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Envelope effects respond dynamically to how hard or softly you play, shaping the sound based on the input signal rather than a fixed control. The effect opens and closes in real time, creating tonal changes that follow your picking or playing dynamics.

They are most commonly associated with envelope filters and auto-wah effects, producing expressive, vocal-like sweeps that react to touch and groove. Envelope effects are widely used in funk, jam, electronic, and experimental music, where rhythmic feel and player interaction are central to the sound.

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Pedals are the tools that let you shape, colour and transform your sound, from subtle tone enhancement to bold, creative effects. Whether you are adding grit, space, movement or control, a pedal becomes part of your playing rather than just an add-on. Exploring different pedals is about discovering what responds to your touch and helps your sound feel more like your own.

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