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Five decades of sound processing expertise distilled into a compact multi-effects pedal. Huge processing power derived from the H9000 Harmonizer, featuring classic algorithms and new effects.

*** New vocal algorithms added- updated April 2025 ***

Harmonizerr+ is Eventide's groundbreaking suite of vocal effects derived from the iconic Harmonizer platform.

Engineered with cutting-edge tech for shaping and transforming vocals in any setting-live or in the studio.

The H90 goes far beyond a standard effects pedal, now expanding its capabilities with two new studio-grade vocal algorithms: VocalTune and VocalShift.

VocalTune

From subtle pitch correction to bold experimental textures, VocalTune is the ultimate tool for vocal enhancement:
Precise scale quantization delivers flawless pitch control
Shape your voice with pitch and formant shifting
Gate and compression controls allow you to sculpt your voice with ease.

VocalShift

Transform your voice into a lush, vibrant choir with VocalShift. Create anything from subtle doublings to expansive vocal ensembles.

Three distinct voices, with pitch and formant per voice
Pitch-perfect harmonies with intelligent scale recognition
Perform features include voice soloing, pitch glides and pitch holds

H90 Control Software Update

The latest H90 Control software for Mac, PC, and iPad, has received some important quality-of-life updates:

Intuitive parameter grouping puts all related settings at your fingertips
Streamlined workflow with a redesigned algorithm and preset selection
Enhanced zooming and resizing

Supplier's Notes:
Beyond the Effect Horizon

The H90 Harmonizer is Eventide's next-generation multi-effects pedal. Whether you want high-quality bread and butter effects or experimental sounds unheard, the H90 has everything you need to inspire your creativity with an intuitive UI designed with players in mind. Discover why top artists and producers have chosen Eventide through the years with 62 effect algorithms and hundreds of Program combinations curated for a variety of instruments and genres. With its comprehensive I/O and flexible routing options, the H90 is designed to be the heart of your rig.

New Technology, New Effects

H90 Harmonizer features modern ARM-based architecture derived from the world's most powerful effects processor, Eventide's flagship H9000 Harmonizer. This paves the way for the ongoing creation of more advanced effects processing techniques. As a result, the pedal not only offers the iconic reverbs, delays, modulation, and pitch shifting effects of the H9 Max but goes far beyond with 10 new powerful algorithms including state-of-the-art, fast-tracking, and warble-free Polyphonic Pitch Shifting. Eventide's proprietary SIFT (Spectral Instantaneous Frequency Tracking) technology clears the road ahead for next-gen effects both long imagined and unimaginable.

Live Performance Machine

The H90 Harmonizer is a live performance powerhouse! The front panel has been reimagined with five push knobs, seven LED buttons, and a hi-res OLED display for greater hands-on control and parameter feedback. Two large push knobs allow you to switch between SELECT, BANK, and PERFORM modes with ease. In PERFORM mode, you get six programmable footswitches. Map functions like tap tempo, preset, insert bypass or momentary states; use them to engage options like reverb freeze, pitch flex, or delay repeat; make multiple instantaneous parameter changes with three Hot Switches .The comprehensive UI allows you to control any parameter with ease. Adjust expression mappings by hand with the PERFORM HotKnob and engage up to six individual assignable parameters with the three push-button Quick Knobs. Get even more control with two inputs for expression pedals or auxiliary switches with up to three buttons. If that wasn't enough, take advantage of the pedal's extensive MIDI control. The H90 comes with hundreds of factory Programs which can be loaded using either SELECT or BANK mode. In SELECT mode, you can navigate your Playlist sequentially without ever missing a detail thanks to the OLED display. In BANK mode, you can quickly load from a bank of 3 Programs, perfect for cueing up a range of sounds for a song. Organizing your favourite sounds has never been easier, simply load a new Playlist and you're ready for the next gig!

UPDATE 17/12/2025: Eventide have just released a brand-new suite of four granular effects, delivering a powerful creative upgrade for H90 users that's proving to be one of the most exciting firmware updates in years.

The four new algorithms, Cosmic Web, Glitch, GrainMod, and Stutter, open the door to state-of-the-art new design tools including blooming reverse delays, glitch-driven rhythms, modulated textures, and stutter-based performance effects.

GrainMod - Morph your sound in novel ways thanks to modulated grain parameters. Three independent LFOs target Trigger Rate, Grain Duration, and Filter for textures that evolve rather than repeat.

• Each LFO features adjustable rate, depth, and waveform.
• Modulating Trigger Rate changes how frequently new grains are created.
• Control grain playback direction via square wave modulation with Direction Mod.
• Retrigger the Perform parameter for resetting all LFO cycles simultaneously.

Cosmic Web - High-end rack processing with a modern, macro granular package. Cosmic Web blends reverse pitched grains with classic Eventide reverb for deep delay and pad-like modulated space.

• Ping Pong mode bounces grains between left and right channels.
• A second independent delay mode modeled after the Crystals algorithm.
• Dynamic retriggering based on input threshold.
• Use Perform Mode to freeze the reverb, launch either voice into an infinite delay, or clear the memory of both.

Glitch - Slice, distort, and reconstruct audio with three distinct glitch types. Each one works independently or stacks with the others for more complex results.

• Alias mode applies digital artifacts to the input signal, or to the output of another active glitch type.
• Burst mode groups short grains together with pitch shifting for a classic granular stutter effect.
• Clock Jumps re-pitch grains to different sample rates, while adding pitch warped effects via Clock Slew.
• Use Perform Mode to trigger glitches on command.

Stutter - The classic granular effect. Create burst patterns with precise control over timing and subdivision. The effect ranges from tight rolls to loose, scattered patterns.

• Length and Rate parameters control burst duration and stutter spacing.
• Trigger stutters with probability-based chance mode, envelope sensitivity for dynamics-based triggering, or manually via footswitch.
• Smear softens stutter attacks while Spread fine-tunes stutter spacing.
• Perform Mode enables continuous stuttering, momentary triggering, or LFO reset.

Specifications

Inputs 1 - 4: 14 inch TS mono jack
Outputs 1-4: 14 inch TS mono jack
Exp/Ctl 1-2: 14 inch TRS / Expression pedal or Aux Switch
USB Type-C: Use USB 2.0 for control, updates, and MIDI
MIDI In: Five-pin DIN (Female)
MIDI Out/Thru: Five-pin DIN (Female)
DC Input Jack: 5.5/2.5mm plug / Center Positive (+)
Input Impedance (Inst. Level: >600k ohms
Input Impedance (Line Level): >80k ohms
Output Impedance: 220 ohms
Recommended Load Impedance: 10k ohms
Maximum Input Level (Inst): +4dBu
Maximum Input Level (Line): +14dBu

Power
12V DC @ 1A / Center Positive (+), 5.5/2.5mm jack

Dimensions (Product)
English: 6.5" (W) x 5.25" (D) x 2.5" (H)
Metric: 170 (W) x 136 (D) x 68 (H) mm

Dimensions (Package)
English: 10.5" (W) x 7" (D) x 3" (H)
Metric: 265 (W) x 180 (D) x 75 (H) mm
Weight (Product): 1.85 lbs / 0.84 kg
Weight (Package): 3 lbs / 1.36 kg
Shipping Contents: H90, Eventide Sticker, 4x Rubber feet, Guitar pick, Universal power supply with plugs (US, UK, EU, AUS), USB A to Type-C cable, Quick Reference Guide