Electro-Harmonix Superego Polyphonic Synth Engine Pedal

Synth Engine Guitar Effects Pedal with Three Operation Modes, Infinite Sustain, Controllable Glissando, and Built-in Effects Loop
Electro-Harmonix Superego Polyphonic Synth Engine Pedal image 1
Electro-Harmonix Superego Polyphonic Synth Engine Pedal image 1
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Electro-Harmonix Superego Polyphonic Synth Engine Pedal
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Another Amazingly Unique Effect From ehx

It's not often a truly unique guitar effect comes along, like the Electro-Harmonix Superego synth engine pedal. The Superego guitar pedal is part synthesizer, part sustainer, and part sampler, allowing you to "freeze" your guitar sound and create layers of sustained soundscapes. You can sustain chords for etheric pad-like effects, or play synthesizer-like leads on your guitar. You can even sustain a note or chord, then "freeze" it while soloing over it. With all-analog circuitry, a built-in effects loop, and a totally original sound, you'll love exploring the possibilities of the Electro-Harmonix Superego synth engine pedal.

Electro-Harmonix Superego Synthesizer Pedal at a Glance:
  • Keyboard-like effects from your guitar
  • Three modes cover a wide range of uses
  • Built-in effects loop
Keyboard-like effects from your guitar

The Electro-Harmonix Superego uses a sample-and-hold circuit to grab a snippet of your guitar's signal, and sustains it to create a pad-like cloud of sound. If you're playing rhythm, the Superego can add depth to your arrangements that you'd normally only get with a keyboard player. When you play lead, you can create synthesizer-like tones that have a character all their own.

Three modes cover a wide range of uses

To get the most out of the Electro-Harmonix Superego you'll want to explore the three operation modes. Momentary mode means the effect is only active when you step on the footswitch, and returns to bypass operation when you lift your foot - it's perfect for sustaining the last note of your solo, for example. Latch mode sustains anything you play while holding down the footswitch like Momentary mode, but continues sustaining until you turn the effect back off - you can use this mode to "record" a layer of sound to play over. And finally there's Auto mode, which doesn't require you hold the footswitch to apply the effect - just play through the Superego, and it'll transform whatever you play into an entirely new sound.

Built-in effects loops

If you like the unique sound of the Electro-Harmonix Superego, then you'll love that it has a built-in effects loop. Use this to add yet another sonic dimension to your tone by adding a delay pedal, chorus effect, reverb, or other effect to the Superego's signal. Whatever effects you add to the Superego's effects loop will only process the wet signal of the Superego, which means you can create custom sound effects that wouldn't be possible with a single input and output.

Electro-Harmonix Superego Synthesizer Pedal Features:
  • Sample-and-hold guitar effects pedal creates synthesizer-like sounds
  • Three different operation modes give you three very different playing experiences
  • Controllable glissando lets you "slide" between notes
  • Infinite sustain for notes and chords
  • Latch mode allows you to record "layers" of sound and play over them
  • Built-in effects loop lets you add additional effects to the Superego's wet sound
  • 9V power supply included
Create never-before-heard guitar effects with the Electro-Harmonix Superego synth engine pedal!

Additional Media

Best Effects Pedals for Synths and Keyboards
How to Choose Effect Pedals for Your Synth

Tech Specs

Pedal Type Synth, Sustain
Inputs 1 x 1/4" (instrument), 1 x 1/4" (Loop return)
Outputs 1 x 1/4" (out), 1 x 1/4" (FX Loop Send)
Power Source 9V DC power supply included
Height 2.25"
Width 4.0"
Depth 4.75"
Weight 1 lb.
Manufacturer Part Number SEGO

Customer Reviews

Based on 14 reviews
Write your review


When I first plugged into this pedal, I was underwhelmed. It is NOT a plug and play piece of gear. However, once I kept playing and adjusting the levels, the sounds got better and I began to like it asca result. Then I hooked my spare delay into the loop and, it came alive! Use the loop, it takes the unit to a whole new level. I have a nova repeater set to reverse mode and the vibrato set pretty high, kill-dry on. The feature that took the most getting used to was the Auto mode, though. But again, stick with it and you will have an awesome expression tool on your hands. Also, I am not an ambiance guitar player by trade. I do not use this to achieve synth tones. The way I use this is to have a pseudo organ/keyboard in the background. As that, it shines for me.
Music background: Prog, worship, etc.

Very Unique Pedal

There is a copy of just about every effect. I don't know of anything that is like this pedal. To be able to play and sustain a chord and then play over it is probably specific to this pedal and could be an effect that sets you apart from other guitarist.
Music background: Pro Musician

Your Instrument's Third Eye

First of all, The reason I bought this pedal is that my pedal board needed a shoegazey, ambient sound. The numerous analog delays, some digital delays, reverb pedals, chorus and other modulation pedals, plus a bunch of pedal I made were not giving me the sound I wanted. But then magicaly, a week later new superego pedal came out on the electro-harmonix website. Once I heard it, I was amazed that it would give me the sound in my head that I was looking for. So I spent some money and bought it. I have played with the electro-harmonix freeze pedal and loved it, but what made me want to spend the extra money was the extra features such as the Momentary, Latch, and Auto mode toggle switch, the Speed / Layer knob, the Gliss control, and what I find the coolest, is that the send and return jacks allow you to modify the wet signal with other pedals, making your options limitless. And you should experiment with other instruments through this pedal, like a synth, sampler, bass, yuke, or whatever has a 1/4" output. The only minor cons I would say this pedal has is one, it doesn't have true bypass but only because of the way the stomp switch works, such as in momentary mode where once your foot is off the pedal, the frozed signal starts to decay. But it would be nice if the put a second stomp switch that was a 3PDT so you could truely bypass the signal. The second con, which really doesn't matter to me at all but may matter to other people is that you can't put a 9v battery in it. But it comes with a 9.6v DC 200mA power supply, which is pretty much the standard for most guitar pedals. The two cons are so minor that I would still give the pedal five stars. There is no other pedal like this and it will add so many more options on your pedal board or synth setup . I pensonally love this pedal, and many of the guitarist who record at my studio love it too. Watch the videos and give the pedal a listen before you get it, but the videos can't even show you 1/100th of what you can do with this pedal.First of all, The reason I bought this pedal is that my pedal board needed a shoegaze, ambient sound. The numerous analog delays, some digital delays, reverb pedals, chorus and other modulation pedals, plus a bunch of pedal I made were not giving me the sound I wanted. But then a week later new superego pedal on the electro-harmonix website.
Music background: Recording / Mixing Engineer, Musician, Pedal Nerd

One of a kind pedal

If you like EHX's freeze pedal, you will be getting the SuperEgo. The core concept remains the same: granular sampling of a few milliseconds that sustain one note or chord endlessly - then you can of course play over these drones- The SuperEgo does that and also packs a lot of new features, such as: Layer/time control: controls the attack and decay of the effect, allowing you to layer/blend drones. Glissando: this knob crossfades and pitch shifts successive effected notes/chords (yes, the SuperEgo is polyphonic) and it sounds incredibly musical. Last but not least the Auto mode is great to add a synthy color to your sound or make other worldly textures by layering chords or notes as you play them, without the need to press the pedal over and over. It can sound as an organ or an analog synth or even a theremin-esque instrument. Very, very cool!! The pedal comes with send and return jacks, so it's possible to send the wet signal to a pedal loop. I tried this with my Moog Murf and it works great! My only complain is that in auto mode, a note has to be fairly loud to be effected. I have a rather light touch and I found myself playing considerably harder to get the pedal to respond. However, a volume booster prior to the SuperEgo in my pedal chain took care of that nicely. Like the Freeze, the SuperEgo's sound has this very glassy, icy quality to it. It works great for some types of sounds, but, if needed, you can use a compressor, EQ and/or some kind of modulator to smooth out or make the sound more alive. It sounds delicious with my Zvex lo-fi junky pedal, for example. Chorus, and especially vibrato work awesomely with the SuperEgo too. I loved the Freeze and the SuperEgo takes it to another new level. If you want to explore with synth and pad-like sounds this is no doubt the best option out there - other than a Moog guitar -
Music background: composer, guitarist, producer

Super cool!

As a guitarist that enjoys producing ambient guitar soounds I'm always on the look out for cool pedals. I recently added the EHX SuperEgo pedal to my board and can tell straight away it will be used frequently in the future. There is so much potential with this little box! The SuperEgo is super cool!
Music background: Guitarist, songwriter, producer
See also: Reverb Pedals, Electro-Harmonix, Electro-Harmonix Reverbs and Delays