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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
Certified Open Box available for $260.10
Rated 4.2/5 Stars (139)
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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
$249.99
Or $42.00 suggested monthly payment§ with 6 month‡ special financing
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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
$118.00
6 Month Special Financing Available‡
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Bundle Savings Available!
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Photo of DigiTech Drop Polyphonic Drop-tune Pitch-shift Pedal - White, Sweetwater Exclusive
Save $20.00, 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!
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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!
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Photo of Electro-Harmonix Pitch Fork Polyphonic Pitch Shift Pedal

Electro-Harmonix Pitch Fork Polyphonic Pitch Shift Pedal

Polyphonic Pitch Shifter with Expression Pedal Input, Blend Control, and Buffered Bypass
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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
$447.00
Or $13.00/month§ with
36 month financing*
Certified Open Box available for $402.30
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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
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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
$164.99
6 Month Special Financing Available‡
Learn More
Bundle Savings Available!
Rated 4.5/5 Stars (55)
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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
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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
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Photo of DigiTech FreqOut Natural Feedback Creation Pedal

DigiTech FreqOut Natural Feedback Creation Pedal

Feedback Creation Effects Pedal
$249.99
Or $42.00 suggested monthly payment§ with 6 month‡ special financing
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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‡
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In Stock
Photo of DigiTech Whammy 5 Pitch-shifting Pedal - White, Sweetwater Exclusive
Save $20.00, 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
Rated 4.3/5 Stars (2)
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Photo of Electro-Harmonix Pitch Fork + Polyphonic Pitch Shift Pedal

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
$246.70
Or $42.00 suggested monthly payment§ with 6 month‡ special financing
Rated 4.4/5 Stars (8)
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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 $191.90
Rated 4.5/5 Stars (63)
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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
Certified Open Box available for $233.55
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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
$229.00
Or $39.00 suggested monthly payment§ with 6 month‡ special financing
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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
Rated 4.7/5 Stars (23)
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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
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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
Rated 3.8/5 Stars (67)
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
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Or $41.00 suggested monthly payment§ with 6 month‡ special financing
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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
Rated 3.9/5 Stars (22)
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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 $224.10
Rated 4.7/5 Stars (11)
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
Rated 4.9/5 Stars (6)
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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
Rated 4.4/5 Stars (32)
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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
Rated 4.3/5 Stars (22)
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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‡
Learn More
Bundle Savings Available!
Rated 4.1/5 Stars (26)
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 DigiTech Mosaic Polyphonic 12-string Effect Pedal

DigiTech Mosaic Polyphonic 12-string Effect Pedal

12-string Effect Pedal for Electric and Acoustic-electric Guitars
$229.99
Or $39.00 suggested monthly payment§ with 6 month‡ special financing
Rated 4.2/5 Stars (52)
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Photo of DigiTech Whammy Ricochet Pitch Shift Pedal

DigiTech Whammy Ricochet Pitch Shift Pedal

Pitch Shift Pedal for Guitar
$239.99
Or $40.00 suggested monthly payment§ with 6 month‡ special financing
Rated 4.6/5 Stars (7)
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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
Rated 3.8/5 Stars (9)
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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
Certified Open Box available for $580.50
Rated 3.8/5 Stars (2)
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
$92.90
6 Month Special Financing Available‡
Learn More
Certified Open Box available for $83.61
Rated 3.8/5 Stars (4)
In Stock
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‡
Learn More
Rated 5.0/5 Stars (1)
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Photo of EarthQuaker Devices Data Corrupter Harmonizing PLL Pedal

EarthQuaker Devices Data Corrupter Harmonizing PLL Pedal

Harmonizing/Fuzz Guitar Pedal with Voice Mixer, Master Oscillator, Subharmonic, and Frequency Modulator Controls
$259.00
Or $44.00 suggested monthly payment§ with 6 month‡ special financing
Bundle Savings Available!
Rated 4.8/5 Stars (9)
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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*
Certified Open Box available for $359.10
Rated 4.4/5 Stars (14)
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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
$319.99
Or $54.00 suggested monthly payment§ with 6 month‡ special financing
In Stock
Photo of Warm Audio RingerBringer Ring Modulation Pedal

Warm Audio RingerBringer Ring Modulation Pedal

Analog Ring Mod Pedal with LFO, Modulation, Drive, and CV Sections
$219.00
Or $37.00 suggested monthly payment§ with 6 month‡ special financing
Rated 4.8/5 Stars (4)
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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 Meris Hedra 3-Voice Rhythmic Pitch Shifter Pedal

Meris Hedra 3-Voice Rhythmic Pitch Shifter Pedal

Stereo Pitch Shifter Guitar Effects Pedal with 3 Voices, Tap Tempo Delay, and Expression Jack
$299.00
Or $50.00 suggested monthly payment§ with 6 month‡ special financing
Rated 4.3/5 Stars (10)
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Photo of Red Panda Radius Ring Modulator/Frequency Shifter Pedal

Red Panda Radius Ring Modulator/Frequency Shifter Pedal

Ring Modulator/Frequency Shifter Pedal with Stereo I/O, Pitch Tracking, LFO, Step Modulator, and USB MIDI
$349.00
Or $59.00 suggested monthly payment§ with 6 month‡ special financing
Rated 5.0/5 Stars (2)
In Stock
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Why Every Musician Needs a Harmony Processor in Their Setup


Whether you’re singing, playing guitar, or diving into analog synths, a little harmony can go a long way in making your music feel bigger and more alive. That’s why Sweetwater carries such a wide range of harmony processors—tools that help your songs and performances sound fuller, richer, and ready for the stage or studio.


Octave Pedals and Harmony Effects That Redefine Your Tone


Harmony processors aren’t one-size-fits-all — they’re built to meet different creative needs. Eventide has set the bar high for guitar harmony effects, packing incredible power into compact pedals that slip easily onto your board. TC Helicon has become a go-to for vocalists, delivering trusted harmony processors for both live and studio use. And if your style leans more raw and gritty, our collection of octave fuzz pedals is perfect for dialing in an edgier, more aggressive tone.


How Harmony Pedals Can Make You Sound Like a Full Band


If you’re performing solo but want that full-band feel, a harmony processor is a great way to fill out your sound. Take the BOSS VE-8 Acoustic Singer — one of our top picks at Sweetwater. It blends your voice and guitar seamlessly, giving you harmonies and a suite of studio-quality effects. Play a chord, sing your line, and suddenly your sound feels wide, immersive, and ready to fill the room.


Get Experimental with Vocoders, Synth Emulators, and More


p>For players who like to experiment, harmony processors open up a whole new world. From the classic robotic edge of a vocoder to EHX’s 9-series guitar synth emulators, there’s plenty to explore. Maybe you’re after the pitch-shifting power of a Whammy Pedal, or the unpredictable textures of EarthQuaker Devices’ Rainbow Machine. Whatever your style, our Sales Engineers know the gear and can help you find the perfect fit.


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


For some, adding a perfectly blended vocal harmony to their folk set is exactly what they’re after. For others, it’s all about breaking boundaries and turning their instrument into a wall of sonic chaos. Wherever you fall on that spectrum, with over a dozen top manufacturers and a massive variety of harmony processors, 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. TC-Helicon VoiceLive Play Acoustic Guitar and Vocal Effects Processor Pedal

    139 reviews

    $289.00

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

    176 reviews

    $249.99

  3. DigiTech Whammy 5 Pitch-shifting Pedal - Red

    56 reviews

    $319.99

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

    12 reviews

    $229.00

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

    11 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.