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Average Price: $45

Budget/Beginner

$100

$301+

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Budget

Standard

High-end

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Description

Elevate your sound with the Donner Harmonic Square, a versatile harmonizer and octave effects pedal designed to expand your musical creativity. This pedal is perfect for guitarists seeking to explore new sonic territories without overwhelming their pedalboard. The Harmonic Square offers a wide range of tonal possibilities, allowing you to add rich harmonies or deep octaves to your sound with ease. Featuring an intuitive layout, it ensures that both beginners and seasoned musicians can dial in their desired settings quickly.

With its compact design, the Donner Harmonic Square is a space-saver on any pedalboard, yet it packs a punch with its robust features. The pedal is equipped with a high-quality DSP chip, ensuring precise tracking and rich, full-bodied effects that maintain the integrity of your original tone. Whether you're looking to add a subtle octave layer or want to experiment with complex harmonies, the Harmonic Square offers nine different pitch modes to tailor your sound to perfection.

Key Features:

  • Nine pitch modes, ranging from -2 octaves to +2 octaves
  • High-quality DSP chip for accurate tone reproduction
  • Compact design perfect for any pedalboard setup
  • True bypass circuitry to maintain signal clarity
  • User-friendly interface for easy operation
  • Sturdy construction for durability in live performances and studio recordings
intheblues

intheblues

Donner Harmonic Square Pedal Octave/Pitch Shifter Pedal

Video thumbnail for Donner Harmonic Square Pedal Octave/Pitch Shifter Pedal by intheblues

Donner Harmonic Square Pedal Octave/Pitch Shifter Pedal

intheblues

intheblues

Video thumbnail for Donner Harmonic Square Guitar Pedal Review by Steve Stine by Steve Stine Guitar Lessons

Donner Harmonic Square Guitar Pedal Review by Steve Stine

Steve Stine Guitar Lessons

Steve Stine Guitar Lessons

Video thumbnail for $50 vs $175? EHX Pitchfork VS Donner Harmonic Square Effect Pedal Shootout Playthrough All Modes by Ambient Bass Creations

$50 vs $175? EHX Pitchfork VS Donner Harmonic Square Effect Pedal Shootout Playthrough All Modes

Ambient Bass Creations

Ambient Bass Creations

Video thumbnail for Donner Harmonic Square Demo and Review by Yet Another Guitar Channel

Donner Harmonic Square Demo and Review

Yet Another Guitar Channel

Yet Another Guitar Channel

Reviews

Critic Reviews

Donner Harmonic Square Pitch Shifter Pedal Review * Ashley J. Saunders

ashleyjsaunders.com

The Donner Harmonic Square Pedal impresses as a budget-friendly option with sturdy build quality and versatile tone capabilities. It excels in offering a range of superb sounds, from octave shift to hollow-sounding chorus effects, with reliable pitch tracking. The controls are intuitive, allowing for detailed pitch adjustments. While it lacks a battery slot, its compact design is a space-saver on pedalboards. The pedal does struggle with low-frequency notes when set to down 2 octaves, which could be a concern for bass players. Despite this minor issue, it stands out as a great alternative to pricier models like the BOSS OC-2, making it a worthy addition for those seeking affordable and durable pitch-shifting effects.

positive

Change My Pitch Up: The Donner Harmonic Square Octave Pedal - Guitar Girl Magazine

guitargirlmag.com

The Donner Harmonic Square Octave Pedal is a compact, versatile powerhouse, offering seven shift types and three tone modes that deliver more than just novelty sounds. While some settings favor leads over chords, the pedal impresses with its range of usable and melodic tones, especially in lower octaves. It's a handy tool for quick key changes without sounding artificial, thanks to its natural tone quality. However, it doesn't include a power supply, requiring a 9V DC adapter to avoid potential damage. At a budget-friendly $50, this pedal is a must-have for musicians looking to enrich their sound and jam with creative freedom.

positive
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4.5 out of 5

Based on 2 Reviews and 8 Ratings

5 star
4 star
3 star
2 star
1 star
M

Room for improvement but decent for its price

For a pedal imitating the Digitech Drop at a lower price (and somehow managing to fit a detune function, and dry and wet knobs), I was interested in getting my hands on it (especially after seeing Nik Nocturnal and Andrew Baena make demo videos of it years back). Although a good pedal overall, there is still some room for improvement

Pros: - Like with any other pitch shifters, its forte lies in the 2-3 steps range for the cleanest output. Anything beyond that would undoubtedly start to sound different from a non-pitch shifted one. But for it's price point, it's amazing that it can do it quite decently - Surprisingly, pitch shifting up is much cleaner than pitch shifting down on this pedal. In fact, it sounds better than transposing up using Neural DSP's Transpose function. Using my 7 string with a highest tuning of drop F#, I heard almost zero artifacts when pitching up to drop A#. - Although not the primary function, the ability to detune +/- up to 30 cents is excellent and useful, whether it be chorus effects like the one Eddie Van Halen uses or playing songs not tuned to A=440Hz. If not for this feature, I would have given this 3/5 stars.

Cons: - I really wish they included a power cable, especially since the pedal had a very specific requirement of (ahem) 9v, 5000mA and negative center polarity plug - Unfortunately, D1 (one octave below D) is the lowest you can drop before it gives a whole bunch of pitch warbling and artifacts. No matter what steps you pitch shift down to, that is the lower limit at which the pedal works. - Chugs get less sustain the more steps you pitch shift, but that's to be expected - The lack of a 1 and 6 step pitch shifting so any Floyd Rosers who wanna tune down from E to Eb are fucked (not a huge concern for a hardtail/non-floyd rose trem player like me tho)

So, this is my review for the pedal (so far). Although some of the drawbacks are a bummer, it's not the end of the world and I think this pedal still does its job well and managed to fulfil its intended goals extremely well.

billy_cobb1

Eureka

Just the missing element needed to make the digital Leslie Sim modulation effects on my board come together to create a convincing B3-122 timbre!

Artist usage

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See how Andrew Baena uses Donner Harmonic Square

Andrew Baena

Guitarist, Music Producer

Carcosa

...
Verified via YouTube

In a YouTube video titled Pitch Shift Breakdowns On A Budget? Cheap Guitar Effect Pedals That Don't Suck!, Andrew Baena reviews the Donner Harmonic Square, demonstrating its capabilities and confirming its use as part of his gear.

Genre Usage

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Used With

Based on how musicians on Equipboard use Donner Harmonic Square, it is most commonly used with the following gear.

Community setups

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memoryloop

memoryloop

Gear IQ 1576

bassistbear

bassistbear

Gear IQ 85

beeflin

beeflin

Gear IQ 351

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