Our Top Picks
Electro-Harmonix Bass Mono Synth Bass Synthesizer PedalEinheitsgröße4.75 x 4 x 2.25 Inches1.3 poundsCheck on Amazon
Top 3 picks at a glance
Quick Comparison
Synth pedals split into a few real families: full polyphonic synthesis engines, monophonic tracking synth pedals, texture/bitcrush effects, and sustain/ambient engines. The table below sorts the picks in this roundup by what they actually do, which instruments they suit, and how much they typically cost. Price tiers are relative (budget, mid-range, premium) because listings move daily.
| Product | Best for | Key specs | Price tier |
|---|---|---|---|
| Klowra South Zoo Voice Synth Pedal | Players who want full chords and vocal-style synth tones from a guitar | Triple-voice polyphonic synthesizer engine; guitar input; standard 9V power; compact stompbox footprint | Budget |
| Electro-Harmonix Bass Mono Synth | Bassists who need reliable low-register tracking with sub-bass weight | Monophonic synth engine tuned for bass range; single-note tracking; 9V DC center-negative power; standard 1/4″ in/out | Budget |
| SONICAKE Bitcrusher Guitar Pedal | Anyone chasing lo-fi, glitch, and digital-degradation textures | Digital bitcrusher / sample-rate reducer; mono 1/4″ in/out; 9V center-negative power; true-bypass style switching | Budget |
| Electro-Harmonix Mono Synth Guitar | Guitarists who want classic analog-style mono synth lead and bass lines | Monophonic synth engine for guitar input; single-note tracking; 9V DC power; standard 1/4″ jacks | Budget |
| MXR Bass Synth Pedal | Bassists who want a dedicated, gig-ready analog-voiced synth on a pedalboard | Bass-focused synth engine; mono tracking optimized for low notes; 9V DC power; standard pedalboard size | Premium |
| MXR MB301 Bass Synth Bundle | New pedalboard builders who want the pedal plus cabling and picks in one order | MXR MB301 bass synth pedal plus instrument cable, 4 patch cables, and 6 Dunlop picks | Premium |
| Electro-Harmonix Superego Synth Engine | Ambient players who want sustained, layered, evolving synth pads from a guitar | Synth engine with sustain/hold behavior; mono 1/4″ in/out; 9V DC power; expression and control options | Mid-range |
How We Chose
This list is built on published specifications, manufacturer documentation, and how each pedal’s advertised feature set maps to a real playing situation. No unit here was tested by us; every claim below comes from what the product listings and well-established category knowledge actually state, not from hands-on impressions.
The selection criteria were straightforward. First, category fit: each pick had to belong clearly to one of the four synth-pedal families (polyphonic synth, mono tracking synth, bitcrush/texture, sustain engine), so a reader can tell at a glance which problem it solves. Second, tracking behavior: whether the engine is polyphonic, monophonic, or a non-tracking effect determines how it responds to chords versus single notes, and that single distinction changes who the pedal is for more than any knob layout. Third, connectivity and power: all picks run on standard 9V DC center-negative supply with 1/4″ in and out, which keeps them drop-in on any board; anything requiring unusual voltage or a proprietary supply was passed over. Fourth, instrument pairing: bass-range tracking is genuinely different from guitar-range tracking, so bass-specific and guitar-specific units are kept separate rather than blended. Fifth, upgrade path: a good budget entry point should lead logically to a mid-range or premium unit, and this list is ordered so a reader can see that path. Price tiers reflect general market positioning, not a fixed number, because listings change daily.
1. Klowra South Zoo Voice Synth Pedal – Best for Full Polyphonic Chords
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The South Zoo Voice Synth Pedal is the pick when you want the pedal to track chords, not just single notes. Its listing describes it as a triple-voice polyphonic synthesizer, which is the key fact: instead of forcing you into one-note-at-a-time synth leads, it lets a guitar send multiple notes at once into a synthesizer engine and get a stacked, voice-like result. That makes it the most interesting budget option for players who write chord-based synth parts rather than riffs.
Who it suits
This is for the guitarist who has heard synth pedals and been frustrated that everything turns to mush the moment two strings ring together. The pedal works best for ambient, indie, and synth-pop parts where you want a warm, layered, choir-like texture under a chord progression. It is also a good first synth pedal because it does not demand that you change your playing style to a strict single-note discipline.
Key specs
- Engine type: triple-voice polyphonic synthesizer
- Input: standard 1/4″ instrument input
- Output: standard 1/4″ output
- Power: 9V DC, standard pedalboard supply
- Form factor: compact stompbox, fits a crowded board
- Controls: voice/character and mix-style controls typical of the category
Strengths
Its biggest strength is exactly the thing most cheap synth pedals get wrong. Polyphonic tracking means you can hold an open chord, dial in a vocal-ish synth tone, and get a musical pad instead of a glitchy mess. The three-voice architecture gives you enough stacking to sound like a small ensemble rather than a single oscillator. Because it runs on ordinary 9V power with standard jacks, it slots into an existing board with no extra power brick or adapter. And at the budget tier, it is a low-risk way to find out whether polyphonic synth is a sound you actually use in songs.
Pros
- Polyphonic, so chords and stacked intervals actually work
- Triple-voice architecture gives a fuller, ensemble feel
- Budget pricing makes it a low-commitment entry point
- Standard 9V power and 1/4″ jacks drop straight into a board
- Compact footprint leaves room for other pedals
Cons
- Polyphonic tracking is still more sensitive to playing clarity than mono tracking
- Sounds are shaped by the pedal’s engine, not by detailed onboard synthesis controls
- Vocal-style synth character is a specific flavor, not a neutral synth
- Budget construction means you should treat it as a starter, not a forever pedal
How it compares
Against the Electro-Harmonix Mono Synth Guitar, the South Zoo is the opposite philosophy. The EHX Mono Synth is a single-note engine tuned for classic analog-style synth leads; play a chord and it will pick out a note rather than synthesize the whole voicing. If your parts are chordal, go South Zoo. If your parts are single-line, the EHX unit will track more predictably. Against the MXR Bass Synth, the South Zoo is cheaper and guitar-focused, while the MXR unit is built specifically for the low-end range. Choose the South Zoo when polyphony matters more than note-tracking certainty.
2. Electro-Harmonix Bass Mono Synth Bass Synthesizer Pedal – Best Tracking in the Bass Register
Bassists get the short end of the stick with most synth pedals, because guitar-range tracking circuits fall apart on a low E or B. The Electro-Harmonix Bass Mono Synth exists to solve that specific problem: it is a monophonic synthesizer engine tuned for the bass guitar’s register, so it reads your lowest notes reliably instead of stuttering. Mono means one note at a time, and on bass that is usually exactly what you want.
Who it suits
This is for the bass player in a synth-driven band who wants to double a keyboard line, add a sub-bass drone under a chorus, or take a solo with a squelchy analog-style voice. It is also a strong choice for beat-makers and producers who want to run a bass guitar through a synth voice for sampled-style lines. It is not aimed at players who want to comp chords.
Key specs
- Engine type: monophonic synthesizer, bass-register tuned
- Tracking: single-note, optimized for low frequencies
- Input/output: standard 1/4″ instrument jacks
- Power: 9V DC center-negative, standard pedal supply
- Controls: synth voice selection and tone shaping typical of the EHX synth family
- Form factor: standard EHX pedal enclosure
Strengths
The reason to buy it is tracking reliability in the low range. Because it is monophonic by design, it does not waste processing on chord analysis, and it can lock onto a single bass note quickly and hold it cleanly. That reliability lets you play with dynamics and articulation and still get a consistent synth voice out the other side. The sub-bass weight it brings is genuinely useful for filling out a mix, letting a bass guitar occupy a synth’s spectral space without a keyboard player. Standard 9V power and ordinary jacks keep integration trivial, and the budget tier makes it one of the most accessible ways to get convincing bass synth tones.
Pros
- Purpose-built for the bass guitar’s low register
- Monophonic tracking is fast and consistent on single notes
- Adds real sub-bass weight to a band mix
- Budget tier makes it a cheap experiment for bassists
- Standard 9V power, standard jacks, no adapter fuss
Cons
- Monophonic only, so chords are out
- Tracking depends on clean articulation and technique
- Onboard synthesis controls are simpler than premium flagship units
- Not voiced for guitar-range leads
How it compares
Against the MXR Bass Synth Pedal, the EHX is the budget option and the MXR is the premium one. Both target bass, both are mono, but the MXR sits in a higher price class and is built more like a gigging centerpiece. If you mainly need a reliable sub-bass voice on a modest board, the EHX gets you there for far less. Against the Mono Synth Guitar, the difference is register: the Bass Mono Synth is calibrated for low notes while the guitar version is calibrated for guitar-range playing. If you play both instruments, choose the one matching your primary instrument, because tracking will be noticeably better in the intended range.
3. SONICAKE Bitcrusher Guitar Pedal – Best for Lo-Fi and Glitch Textures
Not every synth-flavored pedal is a synthesizer. The SONICAKE Bitcrusher is a digital bitcrusher and sample-rate reducer, which means it degrades a clean signal into gritty, aliased, retro-digital noise. It does not track pitch or generate synthesized voices at all. What it does is take your existing guitar tone and wreck it in a controlled, musical way, which is its own form of sound design.
Who it suits
This pedal is for the guitarist chasing 8-bit, chiptune, industrial, or lo-fi textures. It suits noise and experimental players, producers who want a hardware degrader in front of a synth or drum machine, and anyone writing parts that should sound broken on purpose. It is also worth having on board as a “color” pedal even if your main synth sounds come from something else.
Key specs
- Effect type: digital bitcrusher / sample-rate reducer
- Signal path: mono 1/4″ in and out
- Power: 9V DC center-negative
- Switching: true-bypass style footswitch
- Form factor: compact, budget-class stompbox
- Character: digital aliasing, quantization grit, lo-fi degradation
Strengths
Its value is that it is cheap, small, and does one thing convincingly. Bitcrushing is a hard effect to get from most budget multi-effects, and having it as a dedicated stomp means you can slam it on for a bridge or a breakdown and be back to clean instantly. On synth pedals that already sound digital, it works as a second-stage destroyer to push the texture further into glitch territory. Placed after a delay or reverb, it degrades the tails as well as the notes. And because it runs on standard 9V and standard jacks, it integrates with any rig, including before an amp or in a loop.
Pros
- Dedicated bitcrush and sample-rate reduction in one small box
- Budget tier makes it an easy impulse buy
- Compact footprint fits next to other pedals
- Standard 9V power and 1/4″ jacks
- Great as a stacking layer after a synth or modulation pedal
Cons
- Does not synthesize or track pitch at all
- It is a niche flavor; some players will not use it every song
- Mono only, so no stereo spread
- Extreme settings can be harsh without an EQ or filter after it
How it compares
Compared with every other pedal here, the Bitcrusher occupies a different category, so the honest comparison is: buy it as a complement, not a substitute. If you want actual synthesized voices, the Klowra South Zoo or the EHX Mono Synth is the right tool. If you want to degrade existing tones, the Bitcrusher is the cheapest and most direct way in this list. Compared with the Superego Synth Engine, the Bitcrusher is destructive where the Superego is additive; the Superego sustains and layers your note, while the Bitcrusher corrupts it.
4. Electro-Harmonix Mono Synth Guitar – Best Classic Mono Synth Leads
The Electro-Harmonix Mono Synth Guitar is the guitar-range counterpart to the bass version, and it is the pick for players who want classic analog-style synth lead and bass sounds from a guitar. It is monophonic, so it reads one note at a time, which is exactly the discipline synth lead playing demands. Think fat detuned leads, squelchy filtered basses, and resonant sweeps rather than chordal pads.
Who it suits
This suits the guitarist playing synth-heavy rock, funk, or electronic music who wants a lead voice that cuts like a keyboard synth. It is also a good fit for players raised on classic synth records who want to approximate those sounds without buying a keyboard and learning keys. Because it is monophonic, it rewards precise single-note playing and does not punish you with unpredictable chord analysis.
Key specs
- Engine type: monophonic synthesizer, guitar-register tuned
- Tracking: single-note, optimized for guitar range
- Input/output: standard 1/4″ instrument jacks
- Power: 9V DC center-negative
- Controls: synth voice selection and tone shaping in the EHX mono synth family
- Form factor: standard EHX pedal enclosure
Strengths
Where it shines is in tracking guitar-range single notes with enough speed to play actual lines. Because the engine is monophonic, it commits to one pitch quickly, which makes fast passages and bends feel more predictable than polyphonic units often do. The classic analog-style voices give you the familiar synth vocabulary, filtered sweeps, detuned leads, and burbling basses, without a keyboard. It is affordable, runs on standard 9V power, and has ordinary 1/4″ jacks, so adding it to an existing board is a five-minute job. For anyone whose parts are single-line, this is a more sensible choice than a polyphonic pedal.
Pros
- Guitar-register tracking is fast and predictable on single notes
- Classic analog-style synth voice selection
- Budget tier keeps the entry cost low
- Standard 9V DC power and standard jacks
- Monophonic design suits lead lines and bass lines equally well
Cons
- No polyphony, so chords are not the point
- Still sensitive to sloppy articulation and open strings ringing
- Not designed for bass-register low notes
- Voices are fixed by the engine rather than fully programmable
How it compares
Against the Klowra South Zoo, the tradeoff is polyphony versus tracking certainty. The South Zoo can produce chords and layered voices; the EHX Mono Synth will track a single line more reliably and sound more like a classic synth lead. Against the EHX Bass Mono Synth, the difference is register and voicing: this version is calibrated for guitar, the other for bass, and each will track its intended range best. Against the MXR Bass Synth, this is the cheaper and guitar-oriented pick, while the MXR is premium and bass-specific.
5. MXR Bass Synth Pedal – Best Premium Bass Synth for the Board
The MXR Bass Synth Pedal is the premium option in this roundup and the one to look at if bass synth is a core part of your sound rather than an occasional effect. It is a bass-focused synth engine built into a gig-ready MXR enclosure, designed to sit on a working pedalboard and take real use. If the EHX Bass Mono Synth is the budget entry point, this is the step up once you know you want bass synth in your rig permanently.
Who it suits
This suits the gigging bassist who wants a synth voice they can rely on night after night, and the producer who wants a hardware bass synth with a familiar pedal workflow. It also suits players who have already tried a budget bass synth, liked the concept, and now want better build quality and a more substantial feel on the board.
Key specs
- Engine type: bass-focused synthesizer
- Tracking: mono, optimized for low-register bass notes
- Input/output: standard 1/4″ instrument jacks
- Power: 9V DC, standard pedalboard supply
- Build: MXR enclosure, premium-tier construction
- Form factor: standard pedalboard-friendly size
Strengths
Its main strength is that it is a serious piece of gear rather than an experiment. MXR’s reputation is built on gig-worthy pedals, and this unit is positioned as a bass synth you can leave on your board and use every set. Bass-focused voicing means the synth character is chosen for the low register rather than being a guitar pedal with the pitch shifted down. The controls are laid out for quick changes between songs, and standard 9V power keeps it compatible with the rest of a board. For anyone whose band needs synth bass lines, this is the most confidence-inspiring pick here.
Pros
- Premium build quality suited to regular gigging
- Voiced specifically for the bass register
- Mono tracking tuned for low notes
- Standard 9V DC power and 1/4″ jacks
- Board-friendly size and layout
Cons
- Premium tier costs substantially more than the budget bass options
- Monophonic, so chordal bass parts are not on the menu
- Overkill if you only use synth bass once or twice a set
- Guitarists will find the voicing aimed below their range
How it compares
Against the EHX Bass Mono Synth, this is the direct upgrade: same category, higher price tier, better build and a more refined bass-focused engine. If you are starting out, the EHX gets you 80% of the experience for far less. Against the Klowra South Zoo, the MXR is mono and bass-specific while the South Zoo is polyphonic and guitar-oriented, so they are not substitutes. Against the MXR MB301 Bundle, the pedal itself is the same MXR Bass Synth concept, but the bundle adds the accessories, which changes the value calculation.
6. MXR MB301 Bass Synth Bundle – Best One-Order Pedalboard Starter
The MXR MB301 Bass Synth Bundle pairs the MXR bass synth pedal with the accessories a new board actually needs: an instrument cable, four patch cables, and six Dunlop picks. The pedal is the same premise as the MXR Bass Synth above, a bass-focused mono synth in a premium enclosure. The bundle’s value is practical: it removes the separate shopping trip for the cabling and picks that everyone forgets until the board is half assembled.
Who it suits
This is for the bassist building a first serious pedalboard, or anyone buying the MXR bass synth as a gift and wanting everything in one order. It suits players who do not yet own a drawer full of patch cables and who would rather not think about accessories at all. It is less compelling if you already have cables and picks on hand, because you would be paying for items you own.
Key specs
- Core pedal: MXR MB301 bass synth pedal
- Included accessories: MXR instrument cable, 4 patch cables, 6 Dunlop picks
- Engine type: bass-focused mono synthesizer
- Power: 9V DC, standard pedalboard supply
- Input/output: standard 1/4″ instrument jacks
- Build: premium-tier enclosure and accessories
Strengths
The strength here is convenience with no real compromise on the core product. The instrument cable gets you from bass to board, the four patch cables are enough to wire the synth into a small chain, and the Dunlop picks are a known quantity. For a beginner, that means the pedal arrives usable rather than requiring a second order. The premium-tier pedal underneath means the bundle is not a budget shortcut dressed up with extras; it is a serious bass synth that happens to come with the starter kit. If you value simplicity and want to avoid piecemeal purchasing, this is the tidiest option in the list.
Pros
- Pedal plus cabling and picks in one purchase
- Premium MXR bass synth as the core product
- Enough patch cables to wire a small board immediately
- Standard 9V power and 1/4″ jacks
- Good gift or starter package for a new bassist
Cons
- Premium tier price, higher than buying a budget bass synth
- Accessories have no value if you already own them
- Monophonic bass-only engine, not a general-purpose synth pedal
- Cable lengths and pick gauges are fixed by the bundle
How it compares
Against the standalone MXR Bass Synth Pedal, the bundle is the same core concept with accessories included. If you already own cables and picks, the standalone pedal is the logical choice. If you are starting from nothing, the bundle saves a separate order and guarantees the cables match the pedal. Against the EHX Bass Mono Synth, the bundle is a significant premium over a budget mono bass synth, so it only makes sense if you want the MXR build and the accessories together. Against the Klowra South Zoo, the bundle is mono and bass-specific where the South Zoo is polyphonic and guitar-focused.
7. Electro-Harmonix Superego Synth Engine – Best Ambient Sustain and Layering
The Superego Synth Engine is a different kind of synth pedal. Rather than tracking pitch and generating a voice, it captures and sustains what you play, then layers synthesized character on top, producing held pads, drones, and evolving textures. It is the pick for ambient and post-rock players who want a note to hang in the air indefinitely and swell into a synth-like bed underneath everything else.
Who it suits
This suits the ambient guitarist who wants long sustained chords as a foundation, the worship or post-rock player building slow swells, and the experimental player who wants a pedal that turns a single note into a pad. It is also a natural partner for a lo-fi degrader like the Bitcrusher, since you can sustain a chord and then crush it.
Key specs
- Engine type: synth engine with sustain/hold behavior
- Signal path: mono 1/4″ in and out
- Power: 9V DC center-negative
- Controls: sustain and effect-layer controls, with expression and external control options typical of the EHX Superego family
- Form factor: standard EHX enclosure
- Character: held pads, drones, synthesized sustain
Strengths
Its strength is that it does something no other pedal in this list does: it holds a note or chord indefinitely and turns it into a sustained synth texture. That makes it invaluable for arrangements that need a bed of sound under a melody. The synthesized layer on top of the held note gives it a synth character rather than a plain freeze effect, which is why it earns a place in a synth roundup. It responds well to expression control, so you can swell the held sound in and out musically. As a mid-range pedal it sits between the budget entries and the premium MXR units in both price and ambition.
Pros
- Sustains notes and chords into synth-like pads
- Unique capability not covered by tracking synth pedals
- Expression and external control options for performance
- Mid-range tier, cheaper than premium bass synth units
- Stacks beautifully with bitcrushers, delays, and reverbs
Cons
- Does not generate pitched synth voices the way a tracking synth does
- Mono output, so no stereo pad spread
- Sustain behavior can muddy a busy mix if overused
- Different skill set required to use it musically
How it compares
Against the Klowra South Zoo, the Superego is a sustain and layering tool rather than a pitch-generating synth; the South Zoo produces new voices, the Superego holds yours. Against the EHX Mono Synth Guitar, the Superego does not track single notes into a lead synth, it freezes what you play, so the two are complementary on one board. Against the Bitcrusher, the Superego is additive and the Bitcrusher is destructive, and together they cover both directions of texture design.
How to Choose
Choosing between synth pedals comes down to four questions, and answering them in order will usually eliminate all but one or two options.
1. Do you play chords or single notes?
This is the biggest fork in the road. If your parts are chordal, you need a polyphonic engine, which narrows the list to the Klowra South Zoo among the budget picks. If your parts are single-line leads or bass lines, a monophonic pedal will track more reliably and is the better tool. Monophonic engines like the EHX Mono Synth Guitar and the EHX Bass Mono Synth commit to one pitch quickly, which makes fast passages feel more predictable. Polyphonic engines do more work and are correspondingly more sensitive to how cleanly you play. A useful rule: if you find yourself playing more than one note at a time for more than a few seconds, buy polyphonic; otherwise buy mono and enjoy the tighter tracking.
2. What instrument are you playing?
Tracking circuits are calibrated for a frequency range. A guitar’s low E sits around 82 Hz and a bass’s low E sits around 41 Hz, an octave lower, and a five-string bass can go down to roughly 31 Hz. Pedals intended for guitar often struggle at those lower frequencies, and pedals intended for bass can be less articulate higher up the neck. That is why this list separates guitar-range and bass-range units. If you play both instruments, buy for your primary one and accept that the other will track less well. The EHX Bass Mono Synth, the MXR Bass Synth, and the MB301 Bundle are all bass-oriented; the EHX Mono Synth Guitar and the Klowra South Zoo are guitar-oriented.
3. Is this a core sound or an occasional color?
If synth is the sound your band is built around, spend at the premium tier and get the MXR build quality. If synth appears once or twice a set, the budget EHX units and the Klowra deliver the effect without a large outlay. If you are only after texture rather than pitched synth notes, the SONICAKE Bitcrusher and the Superego Synth Engine cover that ground more cheaply and more effectively than a tracking synth would. Honest self-assessment here saves the most money.
4. How much board space and power do you have?
Every pedal in this list runs on 9V DC center-negative and uses standard 1/4″ jacks, which is the common standard for pedalboard power supplies. That means no unusual voltages or proprietary adapters are needed. Still, check your power supply’s total current budget before adding pedals. A typical isolated supply with eight 100mA outputs gives you 800mA total; digital pedals, especially synth and bitcrush units, often draw more than analog overdrives. If your supply has a 500mA output, reserve it for the most demanding digital pedal on the board and keep analog effects on the lower-current outputs. Daisy-chaining several digital pedals from one output is a common cause of noise and intermittent dropouts.
Decision matrix
| Your situation | Best pick | Why |
|---|---|---|
| Guitarist who wants chords and synth pads on a budget | Klowra South Zoo | Triple-voice polyphony at budget tier |
| Guitarist who plays single-note synth leads | EHX Mono Synth Guitar | Mono tracking is fast in guitar range |
| Bassist on a tight budget who wants sub-bass synth | EHX Bass Mono Synth | Bass-register tracking at a low price |
| Gigging bassist who wants synth as a core sound | MXR Bass Synth | Premium build, bass-focused voicing |
| New bassist building a first board from scratch | MXR MB301 Bundle | Pedal plus cables and picks in one order |
| Ambient player who wants sustained pads | EHX Superego | Holds chords into evolving synth beds |
| Player chasing lo-fi glitch and 8-bit noise | SONICAKE Bitcrusher | Dedicated degradation, cheap and small |
| Player who wants both pads and grit | Superego + Bitcrusher | Additive sustain plus destructive texture |
Power and current budget: a worked example
Suppose you build a small synth board with four pedals: a Klowra South Zoo, an EHX Mono Synth Guitar, a SONICAKE Bitcrusher, and an EHX Superego. Assume, for the sake of planning, that digital synth pedals in this class typically draw a few hundred milliamps each while simpler analog-style effects draw well under 100mA. If your isolated supply provides 800mA total across eight outputs, that is comfortable for a four-pedal digital board, but not for eight digital pedals. A practical allocation: put the two most demanding synth engines on separate 200mA-plus outputs, put the bitcrusher on its own output, and put the sustain engine on a fourth. Never daisy-chain two digital synth pedals from a single output; the combined current draw will exceed the output and cause dropouts or hiss. If you are unsure, check each pedal’s documented current requirement against your supply’s per-output rating, and add a 20–30% safety margin.
Connecting synth pedals without noise
Chain order matters. Place tracking synth pedals early, ideally first in the chain, so they receive the cleanest possible signal from the instrument. Pitch-tracking engines work best with a strong, uncompressed input, so avoid putting a compressor or a heavy overdrive before them. Put texture effects like the bitcrusher after the synth pedal so the degradation applies to the synthesized sound rather than the clean guitar. Put the sustain engine either before or after the synth, depending on whether you want to hold the synth voice or the dry note, but usually after a synth pedal if you want to capture and layer the synth tone itself. Keep power cables and audio cables separated on the board, and avoid running a power cable parallel to a patch cable, which is a common source of hum.
Making tracking more reliable
Tracking quality depends heavily on playing. Use the neck pickup with the tone rolled back slightly, because a brighter bridge-pickup signal can confuse pitch detection. Play with a clean, even attack and avoid letting open strings ring under a line you are tracking. Reduce the guitar’s volume knob slightly rather than boosting it; a hot signal clips the input stage and degrades tracking. Roll off any reverb, delay, or modulation before the synth pedal, since those effects smear the note’s onset and make pitch detection harder. If a pedal offers a sensitivity or threshold control, set it just above the point where notes stop registering, then leave it alone.
Upgrade path
The sensible progression is to start with a budget pedal that matches your instrument and playing style, the EHX Bass Mono Synth for bassists or the EHX Mono Synth Guitar for guitarists, or the Klowra South Zoo if you need polyphony. Once you know synth is part of your sound, upgrade within the same category: a budget bass synth leads to the premium MXR bass synth, and a budget guitar synth leads to a more capable polyphonic engine. Texture pedals like the Bitcrusher and the Superego are not rungs on a ladder; they are complementary tools you add when a song calls for them. Build the core tracking sound first, then layer texture around it.
Frequently Asked Questions
Do synth pedals work with chords?
Only polyphonic synth pedals handle chords properly, such as the Klowra South Zoo with its triple-voice design. Monophonic pedals like the EHX Mono Synth Guitar and the MXR Bass Synth track one note at a time and will pick out a single pitch from a chord rather than synthesizing the whole voicing. If chordal synth textures are the goal, polyphony is the specification that matters most.
Why does my synth pedal track badly on low notes?
Tracking circuits are calibrated for a frequency range, and guitar-oriented pedals often struggle below roughly 80 Hz while bass-range pedals are tuned lower. If you are playing a bass through a guitar synth pedal, that mismatch is likely the cause. Switching to a bass-specific unit such as the EHX Bass Mono Synth or the MXR Bass Synth usually resolves it.
Can I use a synth pedal with a keyboard or a drum machine?
Many synth pedals accept external audio through their input, so a keyboard or drum machine can be processed, though results vary with the engine’s design. A bitcrusher like the SONICAKE is especially happy with line-level sources because it does not need to track pitch. A tracking synth pedal works less predictably with polyphonic keyboard input, since its pitch detection assumes a monophonic instrument.
What power supply do these pedals need?
All the pedals in this list run on standard 9V DC center-negative power and use ordinary 1/4″ jacks. That is the common standard for pedalboard supplies, so integration is straightforward. However, digital synth pedals can draw several hundred milliamps each, so confirm your supply’s per-output current rating before daisy-chaining them.
Is a bitcrusher the same as a synth pedal?
No. A bitcrusher like the SONICAKE reduces bit depth and sample rate to create lo-fi, aliased digital textures, but it does not generate pitched synthesized voices. A synth pedal like the South Zoo or the EHX Mono Synth produces actual synth tones by tracking your playing. They are different effects that complement each other well.
What is the difference between a synth pedal and a sustain pedal?
A synth pedal generates or shapes new synthesized sound from your playing, whereas a sustain engine like the EHX Superego holds and layers what you play into a sustained pad. One creates a voice; the other freezes and evolves your existing note. Many players use both, placing the sustain engine after the synth pedal to capture the synthesized tone.
Can I run two synth pedals together?
Yes, and it is common. Put tracking synth pedals first in the chain so they get the cleanest signal, then place texture or sustain pedals after them. Avoid stacking two pitch-tracking pedals back to back if you can, because the second pedal then has to track an already-synthesized signal, which is less predictable than a raw guitar or bass input.
Do synth pedals need a special cable or adapter?
No special cable is required; all the units here use standard 1/4″ instrument cables and standard 9V DC power. What you should check is your power supply’s current capacity per output and whether the polarity is correct, which for these pedals is center-negative. Using the wrong polarity adapter can damage a pedal.
Closing Recommendation by Situation
If you are a guitarist who wants chords and layered synth textures on a budget, the Klowra South Zoo Voice Synth Pedal is the pick. If you are a guitarist playing single-note synth leads, the Electro-Harmonix Mono Synth Guitar tracks more predictably for that job. Bassists on a tight budget should start with the Electro-Harmonix Bass Mono Synth, and bassists who want synth as a permanent, gig-ready part of their sound should step up to the MXR Bass Synth. If you are building your first board and want the pedal plus the cabling in one order, the MXR MB301 Bundle is the tidy choice. For ambient players who want sustained, evolving pads rather than pitched synth voices, the Electro-Harmonix Superego Synth Engine is the right tool. And if you simply want to destroy tone into lo-fi glitch, the SONICAKE Bitcrusher is the cheapest, most direct route. Pair the Superego with the Bitcrusher and you cover both additive and destructive texture design on one board.
