Electro-Harmonix Intelligent Harmony Machine Pedal

Want a perfect sync when you harmonize? The Electro-Harmonix Intelligent Harmony Machine produces matching harmonies while you play with impeccable tracking.

The EHX Intelligent Harmony Machine instantly creates matching harmonies to what you play. It's like having one or even two guitarists jamming with you at the same time and always in perfect sync. The Intelligent Harmony Machine opens a door to the music of great multi-lead guitar bands and multi-part harmonized solos. Plus, its ability to apply harmonies ranging from simple to sophisticated will totally transform what you play. Of course, it also boasts EHX's renowned impeccable tracking and genuine musical tone.

Select your key and the Intelligent Harmony Machines will generate single note, diatonic harmonies* with a huge range of choices that includes both two- and three-part harmonies. Here are your choices:
- 1: 6th Down
- 2: Perfect 4th Down
- 3: 3rd Down
- 4: 3rd Up
- 5: Perfect 4th Up
- 6: Perfect 5th Up
- 7: 6th Up
- 8: 7th Up
- 9: 3rd Up + 5th Up
- 10: 3rd Up + 7th Up
- 11: Perfect 5th Up + Octave Up
These sound so cool that EHX has included them as extra options for the multi-harmony parts (selections 9, 10 and 11) to give you even more choices:
- 9 Optional: 4th Down + 3rd Up
- 10 Optional: 3rd Up + 6th Up
- 11 Optional: Octave Down + 5th Up
- 9 Optional: 6th Down + 4th Down
- 10 Optional: 3rd Down + 3rd Up
- 11 Optional: Octave Down + 4th Down
The Intelligent Harmony Machine also performs perfect polyphonic pitch shifts so the pitch shifts you dial up are applied to chords as well as single notes. EHX even included a Major/Minor switch so you can select whether read more 2nds and 3rds will be major or minor. Here are the interval selections that are available:
- 1: Doubler
- 2: Perfect 4th Down
- 3: 3rd Down (minor or major)
- 4: 3rd Up (minor or major)
- 5: Perfect 4th Up
- 6: Perfect 5th Up
- 7: 2nd Down (minor or major)
- 8: 2nd Up (minor or major)
- 9: Octave Down
- 10: Octave Up
- 11: Perfect 5th Up + Octave Up

The Intelligent Harmony Machine's Moment Mode lets you instantly change pitch by simply depressing the pedal's footswitch. The pitch shift is engaged as long as you hold down the F/S. There's also an option so you can apply a user-set sweep time between dry and effect. Choose instant pitch changes or control the time it takes for the Intelligent Harmony Machine to sweep up and down between the set interval and the dry signal!

EHX Founder, Mike Matthews said: "We designed the Intelligent Harmony Machine for the player who craves maximum power, but in a minimal footprint. You'll dig its sweet, musical tone and spotless tracking!" *Diatonic harmony means notes within a specific key that relate to each other.


- Compact harmony generating, pitch-shifting powerhouse
- Impeccable tracking and superb musical tone
- Two distinct modes: Intelligent Harmony and Polyphonic.
- Intelligent Harmony Mode generates diatonic harmonies in a set key based on the single notes you play. Key Selector and #/- switches provide access to all 12 keys.
- In Polyphonic Override Mode you can play single notes and chords. The IHM's 11-position Interval Selector switch lets you select the harmony.
- In Momentary Mode the effect is only active when the footswitch is depressed. Choose from instant shifts or set the time it takes the signal to sweep up and down.
- Mix control sets the mix between your dry and shifted signals. Dry output adds signal routing and control options and flexibility
- Comes equipped with an EHX 9 Volt power supply, can also run on 9 Volt battery
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Dimensions and Weight in Packaging
Base Item
Shipping Weight: 1.25 lbs
Shipping Dimensions: 7 x 6 x 3 in
Manufacturer Part Number (MPN): IHM
Shipping Weight: 1.25 lbs
Shipping Dimensions: 7 x 6 x 3 in
Manufacturer Part Number (MPN): IHM
Warehouse Resealed
Shipping Weight: 1.25 lbs
Shipping Dimensions: 7 x 6 x 3 in
Manufacturer Part Number (MPN): IHM

For support or warranty questions, please contact the manufacturer:
Phone: 718-937-8300

Reviewers gave this product an overall rating of 4 out of 5 stars. (1 ratings)
Submitted February 23, 2022 by a customer from yahoo.com
"Awesome! You do need an FX Loop though."
Overall: 4 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
Works great! Tracks like it's not even there (you DO have to be in tune or it'll get a little wonky in spots). No noticeable latency and that's with a digital wireless unit (NUX B5rc, which I give 5 stars)However, when I first got it I plugged it straight into the front of my amp, with cables, on it's own, and was immediately disappointed! I almost just unplugged it and sent it back but then I decided to try it through the effects loop of my amp and VOILA!! It came to life! And straight onto the pedalboard it went. It tracks bends well too but you have to bend to the correct pitch. It still works but it doesn't sound good. That's your fault though not the pedal lol. So it's also a great tool to work on getting better with your bends because it's noticeable when you're off but sounds glorious when you nail it.It doesn't drop tune if that's what you're after. It only does harmony aside from one setting where it'll drop you down a 4th to simulate a baritone, so if you want to drop down to B on a standard tuned guitar, you can but that's it. It's not like the Digitech Drop or Pitchfork where you can choose semitones. You can only choose intervals.It does sound digital. but not so much that it's that noticeable. Especially if you're using it in a live setting. It's really fun and inspiring to play with. Gets the creative juices flowing.
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