Attack Decay Tape Reverse Simulator


The circa-1980 Electro-Harmonix Attack Decay is a sought after prize among vintage pedal aficionados. Originally called a Tape Reverse Simulator, it’s known for producing volume and reverse swells, backward tape sounds, artificially short staccato notes and bowed instrument effects. The new Attack Decay reinterprets the classic and keeps its cool factor, but adds some modern features for convenience and enhanced functionality.

It can produce a single volume envelope like the original, or, with Poly engaged, put separate volume envelopes on each note you play. The built-in Harmonix fuzz is now a fully controllable distortion with gain, tone and volume controls. The effects loop allows the musician or sound designer to place the volume envelope onto whatever signal is present at the Return jack. Expression pedal/CV input and three user presets give the user total control over their Attack Decay!


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Quick Specs
- Volume envelope manipulation with adjustable Attack and Decay times.
- Mono mode: one volume envelope at a time, the envelope resets when you play a new note.
- Poly mode: gives each note you play its own envelope.
- Built-in, fully adjustable, Harmonix fuzz enhances the volume envelope effect and produces bowed instrument sounds.
- Built-in effects loop allows for your own pedals to be inserted onto the volume envelope.
- Expression pedal or CV control over every knob on the Attack Decay.
- Save and recall up to three presets.
- EHX 9.6VDC-200mA power supply included
- Current Draw: 150mA @ 9VDC
- Dimensions in inches: 4.0(w) x 4.75(l) x 2.25(h)
- Dimensions in mm: 102(w) x 121(l) x 58(h)
From the Blog
Posted 3/4/2019



The circa-1980 EHX Attack Decay is a sought after prize among pedal aficionados and often commands a price of well over $1000 when one of the rarities surfaces! Now, Mike Matthews has re-released the classic with a lot of modern features for convenience and enhanced functionality... all at a street price of about $125.

Watch Bill Ruppert's exciting guided tour of the Attack Decay with all its incredible volume and reverse swells, backward tape sounds, artificially short staccato notes, bowed instrument sounds and much more.

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Show your colors with genuine EHX tee shirts and authentic Electro-Harmonix accessories!
Get this limited-edition Day-Glo poster of the original 1968 art that inspired the Electro-Harmonix logo!

Mike Matthews stated: “The image on our Flashback Poster is of the original artwork that inspired the famous Electro-Harmonix logo. I think players who dig our pedals will also enjoy the chance to own a piece of EHX memorabilia.”
Did you know that Electro-Harmonix makes many of the world's greatest vacuum tubes? The next time you need to re-tube your guitar, bass, or hi-fi amp, be sure to insist on getting authentic Electro-Harmonix tubes.
Our new EHX Strings Electro-Harmonix electric guitar strings are custom-designed to our specifications and made in the USA by a premiere string manufacturer. Each wound string is precision wrapped with round nickel-plated steel onto a high carbon, hexagon-shaped steel core. The plain strings are made from the same high carbon steel as the hex cores. The high quality steel and computer controlled winding process results in strings that intonate accurately, are better at staying in tune and vibrate evenly for maximum sustain.
Dig it, now you can rock EHX in our new heavy-duty black hoodie! It’s emblazoned with the iconic Electro-Harmonix Flashback logo in white on the left chest and back.