Photo 2 — I built my PG Distortion into a pre-painted and pre-drilled enclosure and decorated it with stickers. Because stickers!
Build a killer distortion pedal customized for your style. It’s easier than you think!
Building stompboxes from scratch is easier than you might expect. So is customizing the circuits to suit your style and taste. This project walks you through the process step by step. When you're done, you'll have a killer distortion pedal—and enough knowledge about using and choosing stompbox components to build countless other pedals.
Anyone of average intelligence with functional hands and eyes can complete this project. But there are many steps—more than we can cover in a conventional magazine article. So we've created an illustrated build guide in PDF form, which you must download to complete the project.
Photo 1: The Electra MPC, a late-'70s/early-'80s guitar with built-in effects, has been largely forgotten. But many boutique builders have borrowed its simple yet great-sounding distortion circuit.
What you'll build. This project is a modernized and tweaked version of a distortion circuit that originally appeared in Electra's MPC (Modular Powered Circuits) guitar, a Japanese axe with built-in effects that was imported into the U.S. by Saint Louis Music in the late '70s and early '80s (Photo 1). The guitar was never very popular, but at some point savvy boutique stompbox builders realized that despite (or maybe because of) the circuit's simplicity, it offers terrific overdrive tones. It's a fine alternative to the Tube Screamer-influenced designs found in perhaps 90 percent of today's overdrive pedals.
We're calling our Electra variation the PG Distortion (Photo 2). Compared to a Screamer, the PG Distortion is less compressed, less midrange-heavy, and more responsive to variations in your playing dynamics. It preserves note attack and has an edgy grind that cuts through onstage and in a mix. It's been used in several highly regarded boutique pedals (just Google the phrase "based on Electra distortion").
What you'll learn. The circuit's simplicity makes this a perfect starter project. But the goal isn't just to build a cool pedal from a few modestly priced parts. From the very first steps, you'll make design choices to suit your style and taste. You'll learn how common stompbox components work, and how to choose the right ones for your needs. Making stuff you like is a prime motive for DIY.
Now, if your goal is simply to build a cool pedal as quickly and cheaply as possible, you might consider a prefab DIY kit rather than this project. (I'm especially fond of kits from Build Your Own Clone because of their clever designs and excellent documentation.) But usually, kits like that only tell you the next step—not why you're doing the step, or how you can apply the procedure to future builds. Also, kits usually come with a printed circuit board (PCB) for mounting components, while we will make connections manually using a blank piece of perforated circuit board—a more laborious process, but a more informative one. So think of this as a stompbox-building class, with the PG Distortion as our case study.
Watch the Video Demo of the PG Distortion:
Project overview. The project is organized into five parts:
1. Preparations. Here you assemble all the needed tools and round up your parts.
2. Breadboarding the circuit. You'll assemble the circuit on electronics "breadboard"—an inexpensive prototyping tool that lets you create circuits without soldering. This method makes it easy to understand which components accomplish what (Photo 5).
Photo 5 — An electronics breadboard lets you test and customize circuits without soldering.
3. Customizing the circuit. Breadboarding is also a great way to explore design options, which you'll do right from the beginning.
Photo 6 — After refining your circuit on the breadboard, you'll mount the components on a piece of perforated circuit board, soldering everything together on the board's reverse side.
4. Assembling the circuit on perf board. Once you finalize your design, you'll solder it onto "perf board," a type of circuit board (Photo 6). It's a more complex process than just plugging parts into holes on a prefab PCB, but it permits customization.
Photo 7 — You'll test your completed board on the breadboard before boxing it up.
Once you learn the technique, you'll be able to transpose most stompbox circuits directly from schematic to perf board—and almost every stompbox schematic is available online. (Yes, reading schematics is one of our topics.) After assembling the circuit board, you'll test it using the breadboard (Photo 7).
Photo 8 (left): Your stompbox will have pro hardware, including true-bypass switching, a DC adapter, and a power-indicator LED. Photo 9 (right): In the final assembly, your circuit board rests atop the gain and volume pots.
5. Boxing the circuit. Finally, you'll box everything up. You'll install the jacks, footswitch, LED, and DC adapter into the enclosure (Photo 8) and then add the circuitry (Photo 9).
Tools.
The tools you need—plus a few that are nice to have.
You'll need these tools to complete the project. Ones marked "optional" are nice to have too.
1. Soldering iron. (Preferably 30 watts or more, but not a large gun-type iron. A "soldering station" with a temperature control is a big plus. Use a fine, narrow soldering iron tip—the best choice for small-format electronic work.)
2. Lead-free solder. (Less toxic than the leaded kind, but still nasty.)
3. A damp sponge to clean the soldering iron's tip.
4. A small electronics breadboard. (They make large-format ones, but most stompbox circuits are simple enough for a small board.)
5. An assortment of jumper cables. (You can make your own, but the prefab ones have metal tips that don't fray from repeated use.)
6. Wire stripper.
7. Wire cutter. (Most strippers have cutters, but you'll probably want a separate flush-edged tool for tight, close cuts)
It's never too early to modify projects to better meet your musical needs and personal style. Even in this simple circuit, small modifications can dramatically alter the effect's sound and response
8. Needle-nosed pliers.
9. Phillips-head screwdriver.
10. An adjustable wrench or a wrench set. (Long-handled luthiers wrenches are nice if you can afford them—plus you can use them for guitar repairs.)
11. A digital multimeter. "Auto-ranging" meters are the easiest to work with. These have many functions, and the high-end ones can be quite complicated. But even budget models should have the functions needed for this project: a voltmeter, an ohmmeter, and a continuity function (a beeper that sounds when you touch the test terminals to any two points that are linked electronically).
12. A small saw and vise for cutting perf board to size.
13. Double-sided foam tape
14. Optional: a "helping hand" vise to hold components steady while soldering.
15. Optional: a syringe-style de-soldering pump.
… plus an electric guitar, an amp, and two audio cables.
Parts.
You can get some parts from any electronics supplier. Others you must order from a stompbox parts specialist.
Here's your "bill of materials" (BOM)—the engineer's term for a parts list. Part of the project involves auditioning multiple components to choose your favorites, so not everything in the list will appear in the final pedal. The extra parts are quite inexpensive, so I recommend getting them all—you'll learn a lot. (In the U.S., a complete set of parts should cost around $50.)
1. Five ¼-watt metal film resistors. Values: 470R, 4.7K, 10K, 68K, 2.2M.
2. Four non-polarized capacitors (caps):
· 473 (also called .047µF or 47n)
· 683 (also called .068µF or 68n)
· two units of 104 (.1µF or 100n)
These can be polyester film, "box style," or ceramic—they all sound the same in this circuit. Get small-format caps rated between 50 and 100 volts, not the large-format caps used in amps and other AC-powered devices. (You'll only use two of these in the final pedal.)
3. One 16V 22µF electrolytic capacitor. (This cap type is polarized.)
4. Three transistors: 2N5088, 2N5089, and 2N3904. (You'll only use one in the final pedal.)
5. Eight diodes, two each of the following. (Not all will appear in the final pedal.)
- 1N4001
- 1N914
- 1N34A
- red 3 mm LED
6. Two 16 mm potentiometers ("pots"): A100K and C10K. (Substitute a B10K if you can't find a C10K.)
Schematics can look intimidating, but it doesn't take long to learn the basic symbols.7. A piece of perf board (perforated circuit board) at least 15 holes in width and seven in height. Chances are you'll saw a standard-sized 45 mm x 45 mm piece (shown) in half.
8. A 3PDT footswitch.
9. Three 1/4" mono jacks. (One is for the pedal, and two are for your breadboard testing rig.)
10. One 1/4" stereo jack.
11. One DC jack. (I used the standard type with an internal nut for the photos in this guide, though you may find it easier to work with an external-nut model.)
12. One 5 mm LED (any color).
13. One 5 mm LED bezel.
14. Two battery snaps. (One for the pedal, and one for the breadboard rig.)
15. One 9-volt battery.
16. Two knobs of your choice.
17. One 2" length of 1/8" heat-shrink tubing. (You can substitute standard electrical tape.)
18. Hookup wire, preferably 24-gauge, stranded and pre-bonded. (For visual clarity, it may help to use several contrasting colors, such as black, red, and white.)
19. One 1590B-size enclosure drilled for two knobs, footswitch, input, output, LED, and DC jack. You can order a pre-drilled box, or use a drill press to make your own holes. Use a larger enclosure if you like, though everything should fit into a compact 1590B. (If you have a drill press, you can save a couple of bucks by drilling your own holes. For an appropriate drill template, Google "1590B drilling template.")
Sourcing parts.
Stompbox parts tend to fall into two categories: those you can get from large electronics supply houses, and those sold chiefly by stompbox specialists. Large suppliers such as Mouser, Digi-Key, and Allied often have the lowest prices, but they don't stock some of the essentials. Meanwhile, the specialized stompbox vendors often carry both specialized and non-specialized parts, and the convenience of one-stop shopping may compensate for slightly higher prices on generic parts.
This isn't a complete list of stompbox parts specialists—just three reliable U.S.-based vendors with fine reputations, listed in alphabetical order. I've had great service from all three businesses.
Meanwhile, I hear good things about Germany's Banzai Music from my friends in the E.U.
Mammoth Electronics has created a preassembled kit with all the parts needed for this project. (Premier Guitar has no financial stake in the product—it's merely offered as a convenience.) The parts are good and the prices are competitive, but it's just one way to go. The kit includes all needed parts, but you must provide the tools. More details here.
Despite (or maybe because of) the circuit's simplicity, it offers terrific overdrive tones. It's a fine alternative to the Tube Screamer-influenced designs found in perhaps 90 percent of today's overdrive pedals.
Your workspace. Work somewhere with decent lighting and ventilation. Expect everything to take longer than planned, so don't start working at your kitchen table if you plan to eat there this week. Remember, a clean, well-organized workspace is a sign of a clean, well-organized mind. My bench is a filthy junk pile.
Safety first (and second and third). This project requires tools and techniques that can hurt you if you're not careful. Fortunately, it's pretty much impossible to electrocute yourself with 9-volt circuits like this one, but it's all too easy to cut or burn yourself.
When in doubt, step away from the bench and seek help. Don't touch things that are hot or sharp. Wear eye protection. Don't work when you're angry or stressed. Don't leave anything dangerous where kids or pets can find it. You know the drill—including the fact that you proceed at your own risk, and that neither I nor Premier Guitar can assume any responsibility for injury, property damage, or other unfortunate events that may occur while attempting this project. Be smart and careful, okay?
Common-sense soldering. If you've never soldered, it can be intimidating. And yes, it's possible to burn things, including yourself. But it's actually an easy procedure that quickly becomes second nature. If you've never soldered before, watch a few YouTube soldering tutorials. Start with this one, in which a clever 11-year-old covers most of what you need to know in three fast minutes.
Some basics.
- Don't touch the hot part.
- Don't leave a hot iron unattended.
- Work in a ventilated area. Even if you're using lead-free solder, it can't be healthy to inhale those fumes for hours!
- Wear eye protection.
- "Tin" the iron's tip by touching a bit of solder to it before starting.
- Keep a damp sponge or rag handy and swab the iron's tip frequently to keep it clean.
- Instead of touching solder to the iron's tip, try to heat the target component and melt the solder against the component. (But yeah, sometimes we cheat and quickly touch the solder to the iron for a fraction of a second to get it flowing.)
- A good solder joint is shiny, smooth, and shaped like a Hershey's Kiss. If it's dark, or sits on the surface like a water droplet, reapply the iron.
- If you make mistakes, it may help to have a syringe-type de-soldering tool. (You simply re-melt the solder, and then suck it up with the tool.)
- Consider using a "helping hands" vise to hold your components, leaving both your hands free for work.
It's possible to complete this project with a bare-bones pencil-type soldering iron, but it's far easier if you use a "soldering station" with adjustable temperature from a company such as Weller or Hakko. Simple hobbyist models start at around $40, and fancier models go for about double that. But don't use big, high-wattage soldering guns—they're too powerful for work like this. Use a fine, narrow soldering iron tip suitable for delicate electronics work.
Photo 10 — You can make sense of many stompbox schematics if you learn half a dozen symbols.
Working with schematics. A schematic is simply a graphic representation of a circuit. Schematics can look intimidating, but it doesn't take long to learn the basic symbols. Photo 10 shows the schematic for this project. The build guide PDF discusses it in detail, but here's a quick intro:
- Schematics are usually arranged with the power connection at the top, ground connections at the bottom, input to the left, and output to the right.
- The zigzag lines depict resistors.
- The potentiometer symbol is like the resistor symbol, but with an added arrow to indicate the middle lug.
- Parallel lines symbolize non-polarized capacitors.
- The electrolytic cap symbol adds a curved line and a plus sign to indicate polarity.
- The diode symbol includes a triangle and a line. The side with the line is the negative terminal. The LED symbol adds arrows representing emitted light.
- Like most circuits, this one includes many connections to ground. We could connect them all with lines in the schematic, but the schematic is easier on the eye is we indicate ground connections with a simple symbol: the downward-facing triangle.
Don't sweat it if you're still confused—it's covered extensively in the build guide.
Stompbox parts tend to fall into two categories: those you can get from large electronics supply houses, and those sold chiefly by stompbox specialists.
Mods of the gods.
Sure, you might be a beginning builder, but chances are you have strong tastes when it comes to guitar sound. It's never too early to modify projects to better meet your musical needs and personal style. In fact, you'll be doing just that within the first few minutes. Even in this simple circuit, small modifications can dramatically alter the effect's sound and response.
Your modding experiments will focus on three areas:
- You'll try different values for the input capacitor (labeled C1 in Photo 10). This part acts as a high-pass filter, removing lows. But the result isn't quite like, say, turning down the bass knob on your amp, or using EQ to remove lows from a recording. Here at the front of the circuit, slight component variations alter the effect's fundamental character.
- You'll audition three different transistors (the part labeled Q1 in Photo 10). This component defines the circuit's gain. You can make this an understated overdrive or an angry chunk machine.
- You'll experiment with different combinations of clipping diodes (parts D1 and D2 in Photo 10). The result can range from soft, warm distortion to razor-edged sizzle.
DIY not? Remember, this project isn't just about building a cool distortion pedal. The goal is learning the "whys" as well as the "hows" so you can a) apply these techniques to any project, and b) alter circuits to taste. I hope you find the process fun and informative, and that when the smoke clears—hee hee—you have an inspiring musical tool. For best results, maintain your patience and sense of humor, and don't freak out when you hit the inevitable hurdles.
There's much more info in the PDF build guide, including additional resources and troubleshooting tips. Download it if you dare!
Click to download the entire build guide in an easy-to-use PDF.
[Updated 8/10/21]
- Build Your Own Stompbox! - Premier Guitar ›
- Stompbox Savants - Premier Guitar ›
- The DIY True Bypass Lesson - Premier Guitar ›
- DIY: How to Install Onboard Effects - Premier Guitar ›
- Get the latest FREE Ebook from PG's Digital Press - Premier Guitar ›
- Why I Built This: Atelier Rosenkrantz’s Rachel Rosenkrantz - Premier Guitar ›
- The DIY True Bypass Lesson - Premier Guitar ›
Some of these are deep cuts—get ready for some instrumental bonus tracks and Van Halen III mentions—and some are among the biggest radio hits of their time. Just because their hits, though, doesn’t mean we don’t have more to add to the conversation.
Naturally, every recording Eddie Van Halen ever played on has been pored over by legions of guitar players of all styles. It might seem funny, then, to consider EVH solos that might require more attention. But your 100 Guitarists hosts have their picks of solos that they feel merit a little discussion. Some of these are deep cuts—get ready for some instrumental bonus tracks and Van Halen III mentions—and some are among the biggest radio hits of their time. Just because their hits, though, doesn’t mean we don’t have more to add to the conversation.
We can’t cover everything EVH—Jason has already tried while producing the Runnin’ With the Dweezil podcast. But we cover as much as we can in our longest episode yet. And in the second installment of our current listening segment, we’re talking about new-ish music from Oz Noy and Bill Orcutt.
“Sometimes, I’d like very much for my guitar to sound exactly like a supa cobra.”
Luthier Creston Lea tells us about his favorite dirt pedal—an Athens, Georgia-made stomp that lets his guitar be a hero.
Let’s face it: Nobody can tell what overdrive pedal you’re using. Whether you’re in a carpeted suburban basement accompanying the hired clown at your nephew’s fifth birthday party or standing on the spot-lit monitor at Wembley, not one person knows whether the pedal at your feet cost $17 or $700, has true bypass, or has an internal DIP switch. Nobody leaning against the barn-dance corncrib or staunching a nosebleed up in the stadium’s cheap seats is thinking, “Heavens yes!! THAT is the sound of a silicone diode!”
So, why buy another overdrive pedal? Or six more? Are they different? (I’m asking myself.) Of course they’re different. (I’m telling myself.) A Turbo Rat is not aKlon. ATube Screamer is not a DS-1. Or is it? I can’t keep track. Why? Because it’s fun to see what the talented manufacturers of the world have to offer. And because any reader who picks up a guitar magazine for any reason other than to swat a fly is curious about what’s new and what other players are using to good effect. You can blow your savings on a guitar—I’d be happy to build you one—or an amp (or vacation or college or discount merlot or a regrettable whole-back tattoo), or you can spend $100 to $300 to satisfy your curiosity. Will anybody in the audience notice? Unlikely. Will you feel better for five minutes or the rest of your life? Maybe. Seems worth rolling the dice from time to time. Nobody gets hurt. And sometimes you’ll find a pedal that pulls something good out of your playing simply by responding to the way you play … which makes you play in new ways, etc., etc., in an infinite loop of delight. Or at least infinite till the next pedal comes along. It feels good. In a troubled and imperfect world, is it so wrong to feel good?
I bought my first overdrive pedal, a well-usedMXR Distortion+, for $25 in 1991. Surely, I could have stopped there. But many others have come and gone in the years since. Have I bought a pedal, sold it, bought it again, sold it again? More than once.
I’ve mostly, finally outgrown the desire for new pedals, but I’m not immune to the occasional itch. Sometimes a trusted brand introduces something I just haveto hear for myself. That’s particularly true in the case of smaller-scale builders whose ears I’ve learned to trust. I’m going to like everythingChris Benson of Benson Amps or Brian Mena of Menatone ever makes, for example, so why not hear it all? Sometimes it’s alluring copywriting that makes me reach for my wallet. Sometimes they just look cool.
Maybe in my case, I just can’t resist a name like Supa Cobra. Sometimes, I’d like very much for my guitar to sound exactly like a supa cobra. When Greer Amps first introduced their Supa Cobra six years ago—described as delivering “chewy medium gain overdrive to awesome crunchy grind!”—I was immediately intrigued.
Oh, how I love the Supa Cobra—a woefully underappreciated pedal now only available from Greer by special request. I’m sure there are smart players who have discovered the joys of its lower-gain settings, but for me it’s perfect for punching through sonic mud and letting my guitar be heard. It lets my guitar be a hero.
I like it best with its 3-way clipping switch set to the middle position, which, according to Greer, bypasses the other modes’ clipping diodes and lets the op amp’s natural drive come through. I can’t say I know exactly what that means, but I know it’s loud and clear and compressed in just the right way to let sustained notes really sing out in a natural, power amp-y manner.
The Supa Cobra’s greatest feature may be the body control that dials in low-end presence without adding any murk. At higher body settings, the notes push on my chest in a way that I find thrilling. I like it around 60 percent with the gain knob turned nearly full up. Perhaps excessive, but life is short. When it’s time to sound big, it’s the biggest-sounding pedal I’ve found. Lots of overtones, but not at the expense of clarity. It’s quick to jump into harmonic feedback at the gain-y settings I like best, but in a beautifully controlled way.
As a matter of fact, I think people do notice what overdrive pedal I’m using. Not that they know it’s a Supa Cobra, but it makes my guitar leap out in a way that so many other pedals have not. To borrow a word from Greer’s Lightspeed Organic Overdrive (also fantastic), it sounds organic. Or, very much unlike a wasp in a tuna can. I think it sounds like music. Loud music.A dual-channel tube preamp and overdrive pedal inspired by the Top Boost channel of vintage VOX amps.
ROY is designed to deliver sweet, ringing cleans and the "shattered" upper-mid breakup tones without sounding harsh or brittle. It is built around a 12AX7 tube that operates internally at 260VDC, providing natural tube compression and a slightly "spongy" amp-like response.
ROY features two identical channels, each with separate gain and volume controls. This design allows you to switch from clean to overdrive with the press of a footswitch while maintaining control over the volume level. It's like having two separate preamps dialed in for clean and overdrive tones.
Much like the old amplifier, ROY includes a classic dual-band tone stack. This unique EQ features interactive Treble and Bass controls that inversely affect the Mids. Both channels share the EQ section.
Another notable feature of this circuit is the Tone Cut control: a master treble roll-off after the EQ. You can shape your tone using the EQ and then adjust the Tone Cut to reduce harshness in the top end while keeping your core sound.
ROY works well with other pedals and can serve as a clean tube platform at the end of your signal chain. It’s a simple and effective way to add a vintage British voice to any amp or direct rig setup.
ROY offers external channel switching and the option to turn the pedal on/off via a 3.5mm jack. The preamp comes with a wall-mount power supply and a country-specific plug.
Street price is 299 USD. It is available at select retailers and can also be purchased directly from the Tubesteader online store at www.tubesteader.com.
The compact offspring of the Roland SDE-3000 rack unit is simple, flexible, and capable of a few cool new tricks of its own.
Tonalities bridge analog and digital characteristics. Cool polyrhythmic textures and easy-to-access, more-common echo subdivisions. Useful panning and stereo-routing options.
Interactivity among controls can yield some chaos and difficult-to-duplicate sounds.
$219
Boss SDE-3 Dual Digital Delay
boss.info
Though my affection for analog echo dwarfs my sentiments for digital delay, I don’t get doctrinaire about it. If the sound works, I’ll use it. Boss digital delays have been instructive in this way to me before: I used a Boss DD-5 in a A/B amp rig with an Echoplex for a long time, blending the slur and stretch of the reverse echo with the hazy, wobbly tape delay. It was delicious, deep, and complex. And the DD-5 still lives here just in case I get the urge to revisit that place.
Tinkering with theSDE-3 Dual Digital Delay suggested a similar, possibly enduring appeal. As an evolution of the Roland SDE-3000rack unit from the 1980s, it’s a texture machine, bubbling with subtle-to-odd triangle LFO modulations and enhanced dual-delay patterns that make tone mazes from dopey-simple melodies. And with the capacity to use it with two amps in stereo or in panning capacity, it can be much more dimensional. But while the SDE-3 will become indispensable to some for its most complex echo textures, its basic voice possesses warmth that lends personality in pedestrian applications too.
Tapping Into the Source
Some interest in the original SDE-3000 is in its association with Eddie Van Halen, who ran two of them in a wet-dry-wet configuration, using different delay rates and modulation to thicken and lend dimension to solos. But while EVH’s de facto endorsement prompted reissues of the effect as far back as the ’90s, part of the appeal was down to the 3000’s intrinsic elegance and simplicity.
In fact, the original rack unit’s features don’t differ much from what you would find on modern, inexpensive stompbox echoes. But the SDE-3000’s simplicity and reliable predictability made it conducive to fast workflow in the studio. Critically, it also avoided the lo-fi and sterility shortcomings that plagued some lesser rivals—an attribute designer Yoshi Ikegami chalks up to analog components elsewhere in the circuit and a fortuitous clock imprecision that lends organic essence to the repeats.
Evolved Echo Animal
Though the SDE-3 traces a line back to the SDE-3000 in sound and function, it is a very evolved riff on a theme. I don’t have an original SDE-3000 on hand for comparison, but it’s easy to hear how the SDE-3 bridges a gap between analog haze and more clinical, surgical digital sounds in the way that made the original famous. Thanks to the hi-cut control, the SDE-3’s voice can be shaped to enhance the angular aspect of the echoes, or blunt sharp edges. There’s also a lot of leeway to toy with varied EQ settings without sacrificing the ample definition in the repeats. That also means you can take advantage of the polyrhythmic effects that are arguably its greatest asset.
“There’s a lot of leeway to toy with varied EQ settings without sacrificing the ample definition in the repeats.”
The SDE-3’s offset control, which generates these polyrhythmic echoes, is its heart. The most practical and familiar echos, like quarter, eighth, and dotted-eighth patterns, are easy to access in the second half of the offset knobs range. In the first half of the knob’s throw, however, the offset delays often clang about at less-regular intervals, producing complex polyrhythms that are also cool multipliers of the modulation and EQ effects. For example, when emphasizing top end in repeats, using aggressive effects mixes and pitch-wobble modulation generates eerie ghost notes that swim through and around patterns, adding rhythmic interest and texture without derailing the drive behind a groove. Even at modest settings, these are great alternatives to more staid, regular subdivision patterns. Many of the coolest sounds tend toward the foggy reverb spectrum. Removing high end, piling on feedback, and adding the woozy, drunken drift from modulation creates fascinating backdrops for slow, sparse chord melodies. Faster modulations throb and swirl like old BBC Radiophonic Workshop sci-fi sound designs.
By themselves, the modulations have their own broad appeal. Chorus tones are rarely the archetypal Roland Jazz Chorus or CE type—tending to be a bit darker and mistier. But they do a nice job suggesting that texture without lapsing into caricature. There are also really cool rotary-speaker-like textures and vibrato sounds that offer alternatives to go-to industry standards.
The Verdict
The SDE-3’s many available sounds and textures would be appealing at $219—even without the stereo and panning connectivity options, a useful hold function, and expression pedal control that opens up additional options. The panning capabilities, in particular, sparked all kinds of thoughts about studio applications. Mastering the SDE-3 takes just a little study—certain polyrhythms can be dramatically reshaped by the interactivity of other controls and you need to take care to achieve identical results twice. But this is a pedal that, by virtue of its relative simplicity and richness and breadth of sounds, exceeds the utility of some similarly priced rivals, all while opening up possibilities well outside the simple echo realm