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Harmony Pedals & Processors

What do harmony processors do?

Harmony processors add richness to your sound by creating fuller and more centered tones. Singing, playing guitar, or working with analog synths, a little harmony can help make your music feel bigger and more alive.

Can a harmony pedal make you sound like a full band?

Yes. If you’re performing solo but want that full-band feel, a harmony pedal is one of the fastest ways to fill out your sound. Take the BOSS VE-8 Acoustic Singer. This pedal harmonizes your voice and guitar in real time, giving you in-key harmonies as you play. Strum a chord, sing your line, and hear your hooks and choruses come to life with fresh textures and up to three-part harmony.

What sounds can harmony processors create?

From the robotic edge of a vocoder to the sonic shapeshifting of EHX’s 9 Series guitar synth emulators, harmony pedals can take your sound in nearly any direction. Looking for the octave-bending power of a Whammy pedal or the unpredictable textures of EarthQuaker Devices’ Rainbow Machine? Our Sales Engineers know the gear and can help you find the right fit for your sound.

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Photo of Boss XS-1 Poly Shifter Pitch-shift Pedal

Boss XS-1 Poly Shifter Pitch-shift Pedal

Polyphonic Pitch-shift Guitar Pedal with Balance, Shift, Toggle/Moment, and Detune Controls
$199.99
Or $34.00 suggested monthly payment§ with 6 month‡ special financing
Bundle Savings Available!
(23)
Photo of DigiTech Drop Polyphonic Drop-tune Pitch-shift Pedal - Red

DigiTech Drop Polyphonic Drop-tune Pitch-shift Pedal - Red

Polyphonic Drop-tune Pitch-shift Guitar Pedal with Momentary/Latching Switch and True Bypass - Red
$189.99
Or $32.00 suggested monthly payment§ with 6 month‡ special financing
(179)
Photo of Electro-Harmonix Pitch Fork Polyphonic Pitch Shift Pedal
$49.30 Off!

Electro-Harmonix Pitch Fork Polyphonic Pitch Shift Pedal

Polyphonic Pitch Shifter with Expression Pedal Input, Blend Control, and Buffered Bypass
$148.50
6 Month Special Financing Available‡
Learn More
Certified Open Box available for $133.65
(75)
In Stock
Photo of TC-Helicon VoiceLive Play Acoustic Guitar and Vocal Effects Processor Pedal

TC-Helicon VoiceLive Play Acoustic Guitar and Vocal Effects Processor Pedal

Guitar and Vocal Digital Multi-effects Processing Pedal with Mic and Instrument Inputs, Dual XLR Outputs with Assignable Function, 1/8" Auxiliary Input, USB Connectivity, and Headphone Output
$289.00
Or $49.00 suggested monthly payment§ with 6 month‡ special financing
(142)
In Stock
Photo of DigiTech Whammy DT Drop Tuning Pedal

DigiTech Whammy DT Drop Tuning Pedal

Guitar Pitch-Shift Effect Pedal - Pitch Effects, Drop and Raised Tuning, and True Bypass
$449.99
Or $13.00/month§ with
36 month financing*
(50)
In Stock
Photo of DigiTech Whammy 5 Pitch-shifting Pedal - White, Sweetwater Exclusive
Save $50.00, Only At Sweetwater!

DigiTech Whammy 5 Pitch-shifting Pedal - White, Sweetwater Exclusive

Polyphonic Pitch-shifting Guitar Pedal with Expression Treadle and MIDI Input - White
$269.99
Or $45.00 suggested monthly payment§ with 6 month‡ special financing
(3)
In Stock
Photo of DigiTech FreqOut Natural Feedback Creation Pedal

DigiTech FreqOut Natural Feedback Creation Pedal

Feedback Creation Effects Pedal
$219.99
Or $37.00 suggested monthly payment§ with 6 month‡ special financing
(65)
Photo of TC-Helicon VoiceLive 3 Extreme Guitar and Vocal Effects Processor Pedal

TC-Helicon VoiceLive 3 Extreme Guitar and Vocal Effects Processor Pedal

Vocal Effects Processor with Harmony Generator, Vocoder, Talkbox, Guitar FX, Looper, Effects Automation, and Performance Recorder
$569.00
Or $95.00 suggested monthly payment§ with 6 month‡ special financing
(69)
Photo of DigiTech Whammy 5 Pitch-shifting Pedal - Red

DigiTech Whammy 5 Pitch-shifting Pedal - Red

Polyphonic Pitch-shifting Guitar Pedal with Expression Treadle and MIDI Input - Red
$319.99
Or $54.00 suggested monthly payment§ with 6 month‡ special financing
(57)
In Stock
Photo of Electro-Harmonix Intelligent Harmony Machine Harmony and Pitch Shifter Pedal

Electro-Harmonix Intelligent Harmony Machine Harmony and Pitch Shifter Pedal

Polyphonic Harmony Generator and Pitch Shifter with Stereo Outputs, Diatonic Harmonization, 11-position Interval Selector, Momentary Mode, and Dry-through Signal Path
$241.50
Or $41.00 suggested monthly payment§ with 6 month‡ special financing
Certified Open Box available for $162.99
In Stock
Photo of Boss PS-6 Harmonist Pedal

Boss PS-6 Harmonist Pedal

3-voice Guitar Harmony Effects Pedal with Harmony, Pitch Shifter, Detune, and S-BEND (Super Bend) Modes, Expression Pedal Controllability
$164.50
6 Month Special Financing Available‡
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Bundle Savings Available!
(57)
In Stock
Photo of TC Electronic Quintessence Harmony Pedal

TC Electronic Quintessence Harmony Pedal

Harmony Generator Pedal for Guitar with TonePrint Support, MASH Footswitch, Analog-dry-through Signal Path, and Selectable Buffered/True Bypass Switching
$129.00
6 Month Special Financing Available‡
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Bundle Savings Available!
(26)
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Photo of DigiTech Drop Polyphonic Drop-tune Pitch-shift Pedal - White, Sweetwater Exclusive
Save $30.00, Only At Sweetwater!

DigiTech Drop Polyphonic Drop-tune Pitch-shift Pedal - White, Sweetwater Exclusive

Polyphonic Drop-tune Pitch-shift Guitar Pedal with Momentary/Latching Switch and True Bypass - White
$219.99
Or $37.00 suggested monthly payment§ with 6 month‡ special financing
Bundle Savings Available! Certified Open Box available for $206.99
In Stock
Photo of Electro-Harmonix Voice Box Vocal Harmony Machine/Vocoder

Electro-Harmonix Voice Box Vocal Harmony Machine/Vocoder

Vocal Harmony Processor/Vocoder with Nine Presets, Reverb, Formant Control, Mic Preamp, Phantom Power, and Balanced XLR Line Output
$261.20
Or $44.00 suggested monthly payment§ with 6 month‡ special financing
Certified Open Box available for $235.08
(18)
In Stock
Photo of Electro-Harmonix Nano Pog Polyphonic Octave Generator Pedal

Electro-Harmonix Nano Pog Polyphonic Octave Generator Pedal

Polyphonic Octave Generator Pedal with Octave Up, Sub Octave, Dry Control, and Compact Housing
$230.40
Or $39.00 suggested monthly payment§ with 6 month‡ special financing
Certified Open Box available for $207.36
(23)
In Stock
Photo of Electro-Harmonix Pitch Fork + Polyphonic Pitch Shift Pedal
$61.70 Off!

Electro-Harmonix Pitch Fork + Polyphonic Pitch Shift Pedal

Polyphonic Pitch Shift Guitar Effects Pedal with 2 Pitch-shifting Engines, 8 Modes, 10 Factory Presets, 100 Recallable Programs, Latch/Momentary Footswitch, User-programmable Footswitch, Expression and Foot Controller Inputs, and Main/Aux Outputs
$185.00
Or $31.00 suggested monthly payment§ with 6 month‡ special financing
(8)
In Stock
Only 5 Left
Photo of Electro-Harmonix POG2 Polyphonic Octave Generator Pedal

Electro-Harmonix POG2 Polyphonic Octave Generator Pedal

Polyphonic Octave Generator for Guitar and Bass with 8-preset Memory and Attack Delay Control
$400.00
Or $67.00 suggested monthly payment§ with 6 month‡ special financing
(22)
In Stock
Photo of Hotone Freqlux Pitch-shift Pedal

Hotone Freqlux Pitch-shift Pedal

Stereo Pitch-shift Guitar Pedal with H1, H2, H3, Preset, Mix, Select, Alt/Menu, and FX Controls, 3 Harmonized Voices, Delay, Modulation, Arpeggiator, MIDI, and USB
$299.99
Or $50.00 suggested monthly payment§ with 6 month‡ special financing
In Stock
Photo of TC Electronic Mimiq Doubler Pedal

TC Electronic Mimiq Doubler Pedal

Doubling Effects Pedal with Stereo I/O and Controls for Tightness, Effect, Dry, and Dubs
$119.00
6 Month Special Financing Available‡
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Bundle Savings Available! Certified Open Box available for $107.10
(59)
Photo of Electro-Harmonix B9 Organ Machine Guitar Effect Pedal

Electro-Harmonix B9 Organ Machine Guitar Effect Pedal

Organ/Electric Piano Emulation Guitar Effects Pedal with Onboard Modulation Processing and Optional Wet/Dry Output
$259.50
Or $44.00 suggested monthly payment§ with 6 month‡ special financing
(70)
In Stock
Photo of Electro-Harmonix V256 Vocoder

Electro-Harmonix V256 Vocoder

Vocoder Pedal with Phantom-powered XLR Input, "Reflex Tune" for Pitch Correction, and Vocoder Band Adjustment from 8-256 Bands
$261.20
Or $44.00 suggested monthly payment§ with 6 month‡ special financing
(9)
In Stock
Photo of DigiTech Mosaic Polyphonic 12-string Effect Pedal

DigiTech Mosaic Polyphonic 12-string Effect Pedal

12-string Effect Pedal for Electric and Acoustic-electric Guitars
$219.99
Or $37.00 suggested monthly payment§ with 6 month‡ special financing
Certified Open Box available for $197.99
(52)
In Stock
Photo of Electro-Harmonix Pico POG Polyphonic Octave Generator Pedal

Electro-Harmonix Pico POG Polyphonic Octave Generator Pedal

Polyphonic Octave Generator Guitar Effects Pedal with 3 Tone Modes
$240.00
Or $40.00 suggested monthly payment§ with 6 month‡ special financing
In Stock
Photo of Eventide MicroPitch Delay Pedal

Eventide MicroPitch Delay Pedal

Delay/Pitch Effects Pedal, with Instrument/Line Level Input, Latching/Momentary Footswitch, Tap Tempo, MIDI Input, Expression Pedal Input, and 4 Bypass Options
$279.00
Or $47.00 suggested monthly payment§ with 6 month‡ special financing
(6)
In Stock
Photo of Electro-Harmonix POG3 Polyphonic Octave Generator Pedal

Electro-Harmonix POG3 Polyphonic Octave Generator Pedal

6-voice Polyphonic Octave Generator Effects Pedal with Stereo Output, Voice Panning, Multimode Resonant Filter, 100 Presets, OLED Screen, and MIDI
$645.00
Or $108.00 suggested monthly payment§ with 6 month‡ special financing
(2)
In Stock
Only 4 Left
Photo of Electro-Harmonix Micro POG Polyphonic Octave Generator Pedal

Electro-Harmonix Micro POG Polyphonic Octave Generator Pedal

Polyphonic Octave Generator Pedal with One Octave Up, One Octave Down, Dry Control, and Compact Housing
$244.90
Or $41.00 suggested monthly payment§ with 6 month‡ special financing
(32)
In Stock
Photo of Keeley Octa Psi Transfigurating Fuzz Pedal with Polyphonic Pitch Shifting

Keeley Octa Psi Transfigurating Fuzz Pedal with Polyphonic Pitch Shifting

Fuzz/Octave Guitar Effects Pedal with Switchable Effect Order, Polyphonic Pitch Shifting, Up/Down/Dual Modes, Momentary/Latching, Tone Switch, and Remote/Exp Jacks
$249.00
Or $42.00 suggested monthly payment§ with 6 month‡ special financing
Certified Open Box available for $212.90
(12)
In Stock
Photo of DigiTech Whammy Ricochet Pitch Shift Pedal

DigiTech Whammy Ricochet Pitch Shift Pedal

Pitch Shift Pedal for Guitar
$199.99
Or $34.00 suggested monthly payment§ with 6 month‡ special financing
(8)
In Stock
Photo of EarthQuaker Devices Rainbow Machine V2 Polyphonic Pitch-shifting Modulator Pedal

EarthQuaker Devices Rainbow Machine V2 Polyphonic Pitch-shifting Modulator Pedal

Polyphonic Pitch-shifting Modulator Pedal with Secondary, Pitch, Primary, Magic, Tone, and Tracking Controls, and Flexi Switch
$249.00
Or $42.00 suggested monthly payment§ with 6 month‡ special financing
Bundle Savings Available!
(12)
In Stock
Photo of Electro-Harmonix C9 Organ Machine Guitar Effect Pedal

Electro-Harmonix C9 Organ Machine Guitar Effect Pedal

Organ/Electric Piano Emulation Guitar Effects Pedal with 9 Presets, Onboard Modulation Processing, and Optional Wet/Dry Output
$259.50
Or $44.00 suggested monthly payment§ with 6 month‡ special financing
Certified Open Box available for $233.55
(63)
In Stock
Photo of Electro-Harmonix Bass9 Bass Machine Pedal

Electro-Harmonix Bass9 Bass Machine Pedal

Bass Simulator Effects Pedal for Guitar with 9 Voices, Dry and Effect Mix Knobs, Sensitivity and Control Knobs
$259.50
Or $44.00 suggested monthly payment§ with 6 month‡ special financing
(22)
In Stock
Only 7 Left
Photo of Electro-Harmonix Pico Pitch Fork Polyphonic Pitch Shift Pedal
$54.60 Off!

Electro-Harmonix Pico Pitch Fork Polyphonic Pitch Shift Pedal

Polyphonic Pitch Shift Guitar Effects Pedal with 10 Pitch Shift Intervals, 3 Modes, Latch/Momentary Footswitch Modes, Selectable Bypass Topology, and Power Adapter
$163.00
6 Month Special Financing Available‡
Learn More
(1)
Photo of DigiTech HammerOn Instantaneous Pitch-shifter Pedal

DigiTech HammerOn Instantaneous Pitch-shifter Pedal

Momentary Pitch-shifter Pedal with 27 Pitches, 3 Modes, Dry Blend, Trills, Classic/Chords Mode, and True Bypass
$249.99
Or $42.00 suggested monthly payment§ with 6 month‡ special financing
Certified Open Box available for $223.19
(3)
In Stock
Photo of DigiTech Whammy 5 MonoNeon Signature Pitch Shift Pedal

DigiTech Whammy 5 MonoNeon Signature Pitch Shift Pedal

Whammy Guitar Pedal, Signature, with 3-octave Range, Hypersonic Mode, MonoNeon Customization Kit, and 5-pin MIDI In
$349.99
Or $10.00/month§ with
36 month financing*
In Stock
Only 3 Left
Photo of Electro-Harmonix Mainframe Bit Crusher Pedal

Electro-Harmonix Mainframe Bit Crusher Pedal

Bit Crusher Effects Pedal, with Bit Reduction and Sample Rate Reduction Controls, HPF/BPF/LPF Filter, Sample Rate Tuning Mode, and Expression Input
$203.20
Or $34.00 suggested monthly payment§ with 6 month‡ special financing
(2)
In Stock
Only 7 Left
Photo of Gamechanger Audio Bigsby Polyphonic Pitch-shifting Pedal

Gamechanger Audio Bigsby Polyphonic Pitch-shifting Pedal

Polyphonic Pitch-shifter, Vibrato, and Expression Pedal
$399.00
Or $12.00/month§ with
36 month financing*
(15)
In Stock
Only 7 Left
Photo of Behringer BM-12 Ring Modulator Pedal

Behringer BM-12 Ring Modulator Pedal

Ring Modulation Guitar Pedal with Lo/Hi Modulator and LFO Switches and Drive, Mix, Frequency, Amount, and Rate Controls
$129.00
6 Month Special Financing Available‡
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(1)
In Stock
Photo of TC Electronic Brainwaves Pitch Shifter Pedal

TC Electronic Brainwaves Pitch Shifter Pedal

Pitch Shifter Pedal with Harmonizer, Doubler, and Octaver Functions, Mash Switch, and Switchable True/Buffered Bypass
$129.00
6 Month Special Financing Available‡
Learn More
Bundle Savings Available!
Photo of Electro-Harmonix Pico Intelligent Harmony Machine Pedal

Electro-Harmonix Pico Intelligent Harmony Machine Pedal

Harmony Guitar Pedal with Interval, Key, Mix, and Volume Control
$149.00
6 Month Special Financing Available‡
Learn More
Certified Open Box available for $134.10
(3)
In Stock
Photo of Electro-Harmonix KEY9 Electric Piano Machine Pedal

Electro-Harmonix KEY9 Electric Piano Machine Pedal

Electric Piano Emulation Guitar Effects Pedal with Onboard Modulation Processing and Optional Wet/Dry Output
$259.50
Or $44.00 suggested monthly payment§ with 6 month‡ special financing
(22)
In Stock
Photo of Eventide PitchFactor Harmonizer Pedal

Eventide PitchFactor Harmonizer Pedal

Stompbox 10 Signature Mono/Stereo Pitch/Delay Effects
$499.00
Or $14.00/month§ with
36 month financing*
(15)
In Stock
Photo of TC Electronic Mimiq Mini Doubler Pedal

TC Electronic Mimiq Mini Doubler Pedal

Doubling Effects Pedal with Controls for Tightness, Effect, and Dry
$79.00
6 Month Special Financing Available‡
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(4)
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Find Octave Pedals and Harmony Effects That Define Your Sound


Harmony processors aren’t one-size-fits-all; they’re built for different creative needs. Eventide is a leading name in guitar harmony effects, packing serious power into compact pedals that slip easily onto your board. TC-Helicon is a go-to for vocalists, offering harmony processors built for the stage and studio. If your style leans more raw and gritty, our collection of octave fuzz pedals is a great choice for dialing in an edgier, more aggressive tone. Whatever your style, Sweetwater has harmony processors to help transform your songs and performances.


From Subtle Harmonies to Sonic Chaos, We’ve Got the Pitch Shifter Pedal for You


Some players want a perfectly blended vocal harmony for their folk set. Others want to turn their instrument into a wall of sonic chaos. Wherever you land on that spectrum, Sweetwater has the guitar or bass pedal, vocal floorboard, or tabletop unit to help you get there.

What are the most popular brands for Harmony Pedals & Processors on Sweetwater.com?


What are the most popular Harmony Pedals & Processors on Sweetwater.com?


  1. Boss XS-1 Poly Shifter Pitch-shift Pedal

    23 reviews

    $199.99

  2. DigiTech Drop Polyphonic Drop-tune Pitch-shift Pedal - Red

    179 reviews

    $189.99

  3. DigiTech Whammy 5 Pitch-shifting Pedal - Red

    57 reviews

    $319.99

  4. Keeley Octa Psi Transfigurating Fuzz Pedal with Polyphonic Pitch Shifting

    12 reviews

    $249.00

  5. EarthQuaker Devices Rainbow Machine V2 Polyphonic Pitch-shifting Modulator Pedal

    12 reviews

    $249.00

Why shop Harmony Pedals & Processors at Sweetwater.com?


With a massive selection of Harmony Pedals & Processors, free shipping, a free 2-year warranty, 24/7 access to award-winning support - and more - Sweetwater gives you more than any other retailer! If you have any questions about Harmony Pedals & Processors, make sure to give your personal Sales Engineer a call at (800) 222-4700.