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Eventide H949 Multi-Effects Harmonizer with Deglitching Plugin

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Quick Overview

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H949 Harmonizer

The World’s First Time Machine


Building on the legacy of the H910 pitch shifter, the H949 was Eventide’s first de-glitched pitch-shifter. Produced from 1977 - 1984, it introduced MicroPitch which used a proprietary single sideband modulation technique for precise control of small pitch shifts. The H949 also offered unique flange, reverse and randomized pitch effects.


Here’s how it was described when first introduced:

...a combination digital delay line, pitch changer and all-around special effects unit. The TIME REVERSAL feature is entirely new. When used as a variable-speed tape recorder, the Harmonizer® is capable of shortening or lengthening a piece of program material to fit a given time slot without altering the pitch.

Popularized by Jimmy Page (as the only piece of digital gear to grace his rig) and cherished by Suzanne Ciani the H949’s full feature set is recreated in this plug-in. From basic engineering and sound sculpting tasks to demonic space robot creations; H949 is built to inspire.


Eventide H949 Harmonizer Plug-in for AAX, VST, AU



Multi-effects Harmonizer with deglitching.
Randomized and reversed delays.
Micropitch for small pitch intervals.
Reverse pitch shift.
Combination digital delay, pitch changer, and all around special effects unit.
Includes H949 Dual for stereo widening, doubling, and reverse link pitch alteration.


Multiple Uses

Create perfect harmonies, custom musical intervals, or outlandish effects. Fatten snares, de-tune synths, spread guitars and create lush vocals that glue your mix. Spice up your guitar solos with delayed reverse sweeps, morph a solo vocalist into a group of backup singers, or send synths down flanged-out dub-holes to another sonic dimension.


De-glitched Pitch Change

The H949 algorithm uses a proprietary auto-correlation algorithm to make intelligent splicing decisions. The user can ‘dumb-down’ the algorithm by choosing a simple cross-fade algorithm which results in characteristic glitching.


Twist the Knobs

Old school “UI” - just twist some knobs to dial in the sound you’re going for.


Double Down

This native plug-in version also includes the H949 Dual, which recreates the popular technique of running two units in parallel. Lush doubling, stereo widening and simultaneous shifting of pitch up and down.


Artists Using H949 Harmonizer

Laurie Anderson


Neil Dorfsman
Bruce Springsteen, Paul McCartney, Dire Straits, Bruce Hornsby
Roy Hendrickson


Ken Sluiter
Heart, Weezer, Ok Go, Morrissey
Stewart Cararas
Billy Ray Cyrus, Joe Perry, Simple Plan
Joe Berger
Jon Hammond Band, BCTD, Cymbalic Encounters



This plug-in is hard to beat for authentic old-school double-tracking effects. The controls provided are unique...The signal flow and the way the various stages interact are extremely creative, flexible, and versatile.
Eli Krantzberg
Pro Tools Expert



Bundle & Save


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Platform Compatibility


Windows 8+AAX 32/64-bit, VST2 32/64-bit, VST3 32/64-bit
macOS 10.9+AAX 64-bit, AU 64-bit, VST2 64-bit, VST3 64-bit


An iLok account is required, but no physical dongle is necessary. Create a free account here.
We test our desktop plugins in Ableton Live, Cubase, FL Studio, Logic Pro, Pro Tools, and Studio One. However, our plugins should work with any compatible host.
New 32-bit macOS installers are no longer being made for this product.