The Donner Harmonic Square Octave/Pitch Shifter is a Donner octave pedal, currently around $54. Close alternatives include the EVH Pitch Fork and the Mooer Polyphonic. It pairs well with the Ampeg SVT-CL and the Ampeg RB-110.
Donner Harmonic Square Octave/Pitch Shifter
Donner · pedal
The Donner Harmonic Square is an octave and pitch shifter pedal from the Chinese budget effects manufacturer Donner, delivering octave-up, octave-down, and pitch shifting effects for guitar. Provides classic sub-octave and upper octave effects along with pitch shifting capability at an accessible Donner budget price. Controls adjust the blend of octave and dry signal with pitch shift interval.
- octave
- pitch
- tracking
- sub
- simple
- drive
- dry
- experimental
Price updated Aug 27, 2026
Genres the Donner Harmonic Square Octave/Pitch Shifter is commonly used in
- Experimental
- Shoegaze
cited
Inferred from shared tonal signals, not a stated genre tag. - Ambient
cited
Inferred from shared tonal signals, not a stated genre tag.
Amps that pair well with the Donner Harmonic Square Octave/Pitch Shifter
Pedals that stack with the Donner Harmonic Square Octave/Pitch Shifter
Walrus Audio EB-10
Walrus Audio
7% matchWhat Donner Harmonic Square Octave/Pitch Shifter brings here leans toward octave — that's worth building a pairing around
Xotic RC Booster
Xotic
7% matchXotic RC Booster leans toward transparent, and that's a real, usable character to pair with
Caroline Guitar Company Meteore
Caroline Guitar Company
5% matchPut Caroline Guitar Company Meteore after Donner Harmonic Square Octave/Pitch Shifter in the signal chain, clear of Donner Harmonic Square Octave/Pitch Shifter's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Dunlop - MXR Carbon Copy Deluxe Analog Delay
Dunlop
5% matchKeep Donner Harmonic Square Octave/Pitch Shifter's octave voice out front: Dunlop - MXR Carbon Copy Deluxe Analog Delay goes after Donner Harmonic Square Octave/Pitch Shifter in the signal chain so its analog warmth voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)
Boutique & premium upgrades
TC Electronic Nether Octaver
TC Electronic
64% similarityShared character: tight_tracking, one_octave, guitar
Electro-Harmonix Pico Pitch Fork
Electro-Harmonix
96% similaritysimilar tone character
Mooer Tender Octaver MKII
Mooer
95% similaritysimilar tone character
TC Electronic Sub 'N' Up Mini
TC Electronic
94% similaritysimilar tone character
Boss OC-2 Octave
Boss
94% similaritysimilar tone character
EarthQuaker Devices Bit Commander Analog Octave Synth
EarthQuaker Devices
94% similaritysimilar tone character
Similar charactersee all similar tone character →
See all alternatives to the Donner Harmonic Square Octave/Pitch Shifter (cheaper + boutique) →
Questions people ask
What are good alternatives to the Donner Harmonic Square Octave/Pitch Shifter?+
The closest matches in character are the EVH Pitch Fork, the Mooer Polyphonic, the TC Electronic Nether Octaver. Boutique upgrades: TC Electronic Nether Octaver, Electro-Harmonix Pico Pitch Fork, Mooer Tender Octaver MKII.
What pairs well with the Donner Harmonic Square Octave/Pitch Shifter?+
Strong matches from rig and tone-complementarity evidence: Ampeg SVT-CL, Ampeg RB-110, Walrus Audio EB-10 — Into the SVT-CL's growling tube stage, the Harmonic Square's sub-octave tracking stays defined..
How much does the Donner Harmonic Square Octave/Pitch Shifter cost?+
Around $54 (live listing price, updated Aug 27, 2026).