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 freshly designed EHX 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!

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
Power adapter included

Product Page 

Review by Trevor Curwen, musicradar.com

Review by Florian von der Ohe, gitarrebass.de

Review by Robby Mildenberger, bonedo.de

Manual

Demo by Elliot Knapp

Demo by Tri Pedal Reviews

Official Product Video

Attack Decay (Tape Reverse Simulator)

With original late-70s Op-Amp Big Muffs selling for exorbitant prices, Mike Matthews decided to take the power to the people and reissue the classic pedal at a price that players could afford! The circuitry of the new EHX Op-Amp Big Muff Pi —sometimes also referred to as the IC or V4 Big Muff— has been faithfully re-created while several practical enhancements have been added including a compact, die-cast chassis and true bypass switching.

“The Op-Amp Big Muff was popularized by the brilliant Billy Corgan who first used it on the Smashing Pumpkins’ epic 1993 album Siamese Dream. After he was videotaped playing and talking about the reissue, Billy stated: ‘The magic’s still in the box, I can still get what I’m looking for!’” – Mike Matthews

The pedal relies on op-amps rather than transistors and three gain stages rather than four, to create its signature sound. It’s a sound that’s been described by noted Big Muff collector and historian, Kit Rae, as: “a huge, crushing Big Muff sound with more crunch… great for grungy, wall-of-sound distortion, heavy rhythm playing and heavy leads.”

A faithful reissue of the original classic circa 1978
Iconic sound and vibe that’s coveted by guitarists
Controls for Tone, Sustain and Volume, plus a Tone Bypass switch
True bypass switching for maximum signal integrity in bypass mode
Rugged, compact, die-cast package… pedalboard friendly
9V battery included

Product Review 

User Manual 

Product Demo 

OP AMP BIG MUFF PI

Completing the powerful trilogy forged by the B9 and C9 Organ Machines, the EHX KEY9 emulates the world’s most coveted electric pianos and more. With 9 presets, you can transform your axe and lay down a cool “Riders on the Storm” style groove or some hot funk ala “What’d I Say!”

The KEY9 transforms the tone of a guitar and/or keyboard into a convincing electric piano emulation, including several variations of the classic Rhodes and Wurlitzer sounds. The KEY9 also features lively recreations of vibes, mallets, an organ, and even steel drums! Based on the popular EHX B9 and C9 pedals, the KEY9 swerves into electro-acoustic territory via knobs that control DRY and KEY volume, as well as preset-specific features that are adjusted with the CTRL 1 and CTRL 2 knobs.

Take it from Mike Matthews who says: “You’ll dig the way the KEY9 turns you into a Rhodes Scholar!”

Transforms the tone of your guitar or keyboard
9 presets that were carefully crafted to emulate classic Wurlitzer® and Rhodes® sounds, plus more
Presets provide control of the fundamental parameters that help define that instrument’s sound
Many presets include adjustable modulation such as tremolo, phaser and chorus
Use it with the B9 and C9 Organ Machines to create your own powerful keyboard rig
Fast and flawless tracking
Power adapter included

Product Page

Review by Michael Behm, bonedo.de

Review by guitar.com

Demo by Sweetwater

Demo by Guitar Interactive Magazine 

Key 9 Electric Piano

The EHX Octave Multiplexer Analog Sub-Octave Generator delivers deep, phat bass tones one octave below the notes you play. Two separate smoothing filters enable you to tailor your sub-octave signal to the exact bass sound you desire, separating the Octave Multiplexer from other octave devices. Run your vocals through it and sound just like Ike Turner. This is a monophonic device and works only on single notes.

OCTAVE MULTIPLEXER

With the EHX Operation Overlord Allied Overdrive, whether you play guitar, bass, keyboards or pretty much any electronic instrument — dialing in great drive sounds is fast and foolproof.

Active 3-band EQ controls, footswitchable BOOST mode, and a dry blend provide versatility for different tones and instruments. The OVERLORD also features two independent distortion channels for use with stereo setups.

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OPERATION OVERLORD ALLIED OVERDRIVE

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