Skip to main content
MusicRadar MusicRadar The No.1 website for musicians
UK EditionUK US EditionUS AU EditionAustralia SG EditionSingapore
Sign in
  • View Profile
  • Sign out
  • Artist news
  • Guitars
  • Controllers
  • Drums
  • Keyboards & Pianos
  • Guitar Amps
  • Music Gear Reviews
  • Synths
  • Software & Apps
  • More
    • Recording
    • DJ Gear
    • Acoustic Guitars
    • Bass Guitars
    • Tech
    • Tutorials
    • Reviews
    • Buying Guides
    • About us
More
  • "She knew what she'd created": Back to Black
  • Trower's '80s supergroup
  • Music theory tricks
  • Stage Tour game
  • 95k+ free music samples
  1. Guitars
  2. Guitar Pedals

Review round-up: offbeat modulation pedals

News
By Alex Lynham
Published 26 February 2019

Inspirational options from Keeley, Pigtronix, Boss and Valeton

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Need some new ideas? Got some cash to burn? Whatever the reason, we’ve got just the thing. 

Don't Miss

The 10 best chorus pedals for guitar

This rogue’s gallery of modulation pedals will do it all, from boutique modulation to analogue synthesis. 

With the Dimension C, we’re seeing the return of perhaps the best stompbox chorus ever. Not only that, but in this Waza reissue, a switch to change it over to a SDD-320 mode, emulating the rack effect the original was based on. The SDD-320 fetches astronomical prices on the used market, so its inclusion is a win-win. 

Meanwhile, with the Coral, we’ve got a wallet-friendly, pocket-sized do-it-all box to spark new song ideas while you’re noodling. So whether you’re curious about phaser, flanger or ring modulator, step on up! 

Page 1 of 5
Page 1 of 5
Keeley Bubble Tron

Keeley Bubble Tron

This multi-function modulation pedal is aimed at guitarists who want to box off several modulation options with a single pedal. 

With a filter, phaser and flanger, the core filter-based modulation sounds are all accounted for and deliver pretty much what you’d expect. There are some pleasant surprises at the extreme ends of the controls for rate and depth, with psyched-out, weird sounds and artifacts aplenty, but most people will be after belt-and-braces decent mod settings, and those are here too. 

We found the phaser most compelling with the depth and speed pulled back for some '70s prog vibes. 

4 out of 5

Page 2 of 5
Page 2 of 5
Boss DC-2W

Boss DC-2W

The original Boss Dimension C was a stereo chorus that had the relatively unique distinction of using two parallel analogue BBD paths to create its sound. 

That lush, 80s chorus is delivered in spades by the Dimension C, while updates have found issues with the original – noise and low output volume - largely mitigated. Mode 1 is great for subtle, Siamese Dream-style Smashing Pumpkins tones, while at the other extreme in Mode 4, think She Sells Sanctuary by The Cult. 

It’s an expensive beast, but this is a unique chorus sound, magnificently executed, and available again at long last. 

4.5 out of 5

Page 3 of 5
Page 3 of 5
Pigtronix Ringmaster Analog Multiplier

Pigtronix Ringmaster Analog Multiplier

The Ringmaster is an analogue synthesiser and ring modulator with a ton of controls. 

Even without diving into the different carrier and CV options, the front panel can be a little overwhelming and takes some time to dial in a good sound. Fuzzy, grainy ring mod tones are the easiest to tap, but with some tweaking there’s also tremolo and sample-hold sounds possible, with harmonised notes dancing around the input signal. 

It feels at times like it might better suit a keyboard rather than a guitar, but it’s hard to think of a more feature-rich ring modulator on the market. 

4 out of 5

Page 4 of 5
Page 4 of 5
Valeton Coral MDR

Valeton Coral MDR

If what you’re looking for is a pedal to trigger inspiration, then it’s hard to go wrong with the Valeton Coral MDR. 

MDR stands for modulation, delay, reverb, and this compact box gets every last mile out of the digital chip nestled inside. There are eight patches, with a further eight accessible via a toggle switch, and the footswitch even works for tap-tempo, though it’s a hair short of foolproof. 

Some sounds are gimmicky, but the sine and square wave tremolo are great, and both the phaser and reverb ‘A’ are decent. It’s fiddly because of its size, but the core sounds aren’t bad at all - so at this price, why not? 

4 out of 5

Page 5 of 5
Page 5 of 5
Alex Lynham
Alex Lynham

Alex Lynham is a gear obsessive who's been collecting and building modern and vintage equipment since he got his first Saturday job. Besides reviewing countless pedals for Total Guitar, he's written guides on how to build your first pedal, how to build a tube amp from a kit, and briefly went viral when he released a glitch delay pedal, the Atom Smasher.

Read more
A Beetronics Seabee Lite chorus pedal on a honeycomb rubber mat
Guitar Pedals "A great chorus pedal that treads its own path: Beetronics Seabee Lite review
 
 
A worn, dirty pedalboard with a variety of different guitar pedals
Pedalboards Best pedalboards 2026: top choice 'boards for guitarists
 
 
EarthQuaker Devices Towers
Guitar Pedals “An excellent example of the genre’s shifting atmospheric soundscapes”: EarthQuaker Devices Towers review
 
 
MXR Textures Granular Synth Pedal
Guitars Introducing Textures, the granular synth pedal from MXR that dreamy ambient tones are made of
 
 
Crazy Tube Circuits White Whale Junior
Guitar Pedals Crazy Tube Circuits White Whale Junior review
 
 
MusicRadar Guitar Gear Round-up June 2026
Guitars MusicRadar’s epic guitar gear round-up: June ’26 edit, ft. EHX, PRS, Fender’s mega-launch and more
 
 
Latest in Guitar Pedals
Hotone Ampero II Stage
Guitar Pedals “Even if you have a decent amp, there's enough variety and depth of effects in the Stage to justify integrating it into an existing rig”: Hotone Ampero II Stage review
 
 
Polyend Loop looper pedal
Guitar Pedals Polyend Loop is part looper pedal, part drum machine and comes stocked with over 100 effects
 
 
Boss EX-4 Effects Expander
Guitars “Expands the range of your pedalboard – without changing what already works”: Boss unveils the EX-4 Effects Expander, a compact multi-fx powerhouse that's designed to maximise your pedalboard's potential
 
 
An Eventide H9 Harmonizer Gen 2 multi-effects pedal on a white pegboard
Guitar Pedals "Some of the best quality effect algorithms I’ve ever laid ears on": Eventide H9 Harmonizer Gen 2 review
 
 
Electro-Harmonix Adrian Belew Echoflanger
Guitars “Equal parts smooth operator and agent of chaos”: EHX and Adrian Belew resurrect the Echoflanger
 
 
IK Multimedia Tonex Board
Guitars IK Multimedia launches flagship amp modeller that lets you run four Tone Models simultaneously
 
 
Latest in News
Larry Mullen Jr
Drummers “My body just went, ‘You’ve had enough.'”: Larry Mullen Jr on his neck injury and how he felt “humiliated”
 
 
Bit Layer
Tech This free multiband bitcrusher is a surgical tool for lo-fi sound design
 
 
UNITED STATES - SEPTEMBER 22: Photo of Stevie WONDER; Stevie Wonder promoting the album Songs In The Key Of Life, dressed as cowboy (Photo by Richard E. Aaron/Redferns)
Artists Stevie Wonder surprise releases four previously unheard songs from 1976's Songs in the Key of Life
 
 
Bass Guitars Ex-Metallica bassist Jason Newsted pays his respects to the late, great Cliff Burton
 
 
LOS ANGELES, CALIFORNIA - SEPTEMBER 27: (L-R) Dave Grohl, Krist Novoselic, and Pat Smear of Nirvana accept the Video Vanguard Award onstage during the 2026 MTV Video Music Awards (VMAs) at Peacock Theater on September 27, 2026 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
Artists Nirvana's Krist Novoselic and Dave Grohl reunite at the 2026 VMAs as Madonna and Taylor Swift win big
 
 
HARTFORD, CONNECTICUT - SEPTEMBER 25: (EXCLUSIVE COVERAGE) Olivia Rodrigo performs onstage during The Unraveled Tour kick off at PeoplesBank Arena on September 25, 2026 in Hartford, Connecticut. (Photo by Kevin Mazur/Getty Images for Live Nation)
Artists Olivia Rodrigo kicks off her Unraveled tour with a “one of one” heart-shaped guitar and a surprise solo
 
 

MusicRadar is part of Future plc, an international media group and leading digital publisher. Visit our corporate site.

Add as a preferred source on Google Add as a preferred source on Google
  • About Us
  • Contact Future's experts
  • Terms and conditions
  • Privacy policy
  • Cookies policy
  • Advertise with us
  • Accessibility Statement
  • Careers

© Future Publishing Limited Quay House, The Ambury, Bath BA1 1UA. All rights reserved. England and Wales company registration number 2008885.

Please login or signup to comment

Please wait...