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Sweetwater
4.0 (10)
$69.99
Guitar Center
4.5 (7)
$69.99
Amazon
4.5 (771)
$45.99
Reverb
5.0 (8)
$45.15 New
$35.00 Used
Musician's Friend
4.0 (4)
$69.99
B&H
4.5 (3)
$69.99
Thomann
4.2 (184)
$42.00

Average Price: $56

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$500

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Based on price data from 5 merchants for "Korg Monotron DUO Analog Ribbon Synthesizer". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Product Description:

Experience a piece of music history, all in the palm of your hand, with the Korg Monotron DUO Analog Ribbon Synthesizer. This compact yet powerful device brings you the raw, authentic sound of analog synthesis, without any compromise on quality or versatility.

Equipped with two analog oscillators, this synthesizer gives you the ability to create a rich, dynamic sound. Tune these oscillators in unison to achieve a thick, harmonious tone, or tune them in intervals to emulate classic soloing sounds and generate new, innovative effects.

The Monotron DUO's ribbon controller keyboard comes with a Scale function, familiar to users of the KAOSSILATOR. This function allows you to choose from four scales: Chromatic, Major, Minor, or Off, enabling you to play precise pitches or generate musically coherent phrases with a simple slide of your finger.

The secret weapon of this synthesizer is its X-MOD (cross modulation) circuit, borrowed from Korg's classic Mono/Poly. This circuit allows you to introduce a mild or razor-sharp edge to the overall sound, creating a rich vibrato or extreme metallic sounds reminiscent of an FM synth.

The Monotron DUO also features the same highly acclaimed VCF circuit as KORG's classic MS-10 and MS-20 semi-modular synthesizers, providing you with a powerful filter that can dramatically alter and enrich the sound.

Key Features:

  • Two analog oscillators for rich, dynamic sound creation
  • X-MOD circuit from Korg's classic Mono/Poly for creating unique sound effects
  • Ribbon controller keyboard with Scale function for precise pitch control
  • Analog filter circuit from Korg's classic MS-10 and MS-20 synthesizers
  • Integrated speaker and battery operation for portability
  • Auxiliary input for filtering external audio signals
  • Headphone output for private playing or recording.

Owner's manual

Korg Monotron DUO Analog Ribbon Synthesizer User Manual

Product specs

Type Portable Handheld Synthesizer
Polyphony Monophonic
Analog Inputs 1 x 1/8" TRS (Aux)
Analog Outputs 1 x 1/8" TRS (Headphones)
Power Supply 2 x AAA Batteries
Height 1.1"
Width 4.72"
Depth 2.83"
Weight 0.21 lbs.

FAQs

What type of synthesis does the Korg Monotron DUO use?

The Korg Monotron DUO uses analog synthesis, featuring dual oscillators for creating rich and complex sounds with a classic analog character.

Is the Korg Monotron DUO suitable for live performances?

While the Korg Monotron DUO is primarily designed as a portable and fun synth for experimentation, its compact size and unique sound make it suitable for live performance as a secondary sound source or for adding texture.

How does the ribbon controller on the Korg Monotron DUO work?

The Korg Monotron DUO features a ribbon controller, allowing you to play notes by pressing and sliding your finger along its surface, which makes it intuitive and expressive for creating gliding pitch effects.

Can the Korg Monotron DUO be integrated into a larger setup?

Yes, the Korg Monotron DUO can be integrated into a larger setup using its 1/8" TRS input and output, making it easy to connect with other audio equipment and expand your sound palette.

What power source does the Korg Monotron DUO require?

The Korg Monotron DUO is powered by 2 AAA batteries, making it highly portable and convenient for on-the-go music creation.

sonicstate

sonicstate

Review: Korg Monotron DUO and DELAY

Video thumbnail for Review: Korg Monotron DUO and DELAY by sonicstate

Review: Korg Monotron DUO and DELAY

sonicstate

sonicstate

Video thumbnail for Korg Monotron Analog Ribbon Synth | UniqueSquared.com by UniqueSquared

Korg Monotron Analog Ribbon Synth | UniqueSquared.com

UniqueSquared

UniqueSquared

Video thumbnail for KORG "monotron DUO" Analogue Ribbon Synthesizer by KORG INC.

KORG "monotron DUO" Analogue Ribbon Synthesizer

KORG INC.

KORG INC.

Video thumbnail for In The Studio:  Korg Monotron Duo; Monotron Delay by Korg

In The Studio: Korg Monotron Duo; Monotron Delay

Korg

Korg

Video thumbnail for Korg Monotron Duo Demonstration by DV247 Music Store UK TV

Korg Monotron Duo Demonstration

DV247 Music Store UK TV

DV247 Music Store UK TV

Video thumbnail for Korg Monotron Delay - Should you buy it? (Review) by BoBeats

Korg Monotron Delay - Should you buy it? (Review)

BoBeats

BoBeats

Video thumbnail for Korg Monotron Duo and Delay by B&H Photo Video Pro Audio

Korg Monotron Duo and Delay

B&H Photo Video Pro Audio

B&H Photo Video Pro Audio

Video thumbnail for Korg Monotron Duo Review: raw sound making (and sampling) | No talking, no unboxing. by Juan Preisler

Korg Monotron Duo Review: raw sound making (and sampling) | No talking, no unboxing.

Juan Preisler

Juan Preisler

Video thumbnail for Beginner Synths // Korg Monotron Duo review and sound demo by Saturday Music Machines

Beginner Synths // Korg Monotron Duo review and sound demo

Saturday Music Machines

Saturday Music Machines

Reviews

PROS

  • Offers fantastic analog sounds for its price

  • Legendary MS20 filter and MonoPoly synth's x-mod feature

  • Ability to create a wide range of analog tones

  • Can process external audio with its filter input

  • Dual oscillators for complex sound creation

  • Scale select button enhances melodic playability

  • Highly portable and battery-powered

  • Can be modded for expanded functionality

  • Excels as an external signal processor

  • Fun and creatively inspiring for sound exploration

CONS

  • Limited controls and features

  • Ribbon keyboard can be challenging to play melodies

  • Output noise may be an issue for some

  • Lacks MIDI connectivity, limiting integration with other gear

  • Pitch knob offers limited range

  • Primarily a noisemaker rather than a precise instrument

  • Requires external effects for best performance

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Korg Monotron DUO Analog Ribbon Synthesizer.

Features and functionality

  • The Monotron DUO's controls focus on a second oscillator, differing from the original's LFO modulatable filter.

    Source
  • All Monotrons feature the MS-20's filter, useful for processing external audio, despite the output being mono.

    Source
  • The Monotron Duo allows playing in a scale determined by tuning the VCOs, which is advantageous for melody creation compared to the Delay's focus on effects.

    Source
  • The Duo's cross modulation between oscillators is particularly effective for generating unique effects, adding versatility to its sound palette.

    Source

User experience

  • Playing with a stylus can help with note accuracy on the Monotron's small ribbon controller.

    Source
  • Owners report that the Monotron Duo produces surprisingly good sounds through proper headphones, despite its small size and affordability.

    Source
  • Users find the Monotron Duo to be noisy, requiring additional filtering when recording to clean up the sound.

    Source
  • Owners find the Duo challenging to play accurately, even with scale features, highlighting the need for practice and possibly using a stylus for precision.

    Source

Comparisons

  • The Monotron DUO is considered more basic and less engaging compared to the original and the Monotron Delay.

    Source

Use cases and applications

  • The Monotron Delay is widely preferred for its distinctive delay effect and ability to serve as a lo-fi delay for external gear.

    Source
  • The Duo, when combined with a cheap guitar loop pedal, can be used creatively for basic music creation and learning about synthesis on a budget.

    Source
  • The Duo excels at producing drones with its MS20 filter, capable of creating resonant, throbbing sounds for psychedelic or experimental music.

    Source

Value and pricing

  • The Monotron Delay is sometimes modified and sold in a larger form factor for higher prices, indicating the demand for its delay function.

    Source

Mods and upgrades

  • Adding a neodymium magnet to the ribbon can enable droning, enhancing creative possibilities and sound experimentation.

    Source

Critic Reviews

Korg Monotron Duo review | MusicRadar

musicradar.com

Korg's Monotron Duo is a delightful pocket-sized synth with notable enhancements over its predecessor, featuring an extra oscillator for richer sound and intuitive ribbon modes for accurate pitch control. While it loses the original's LFO, the Duo compensates with its cross-modulation capabilities, making it more versatile for melody creation. However, the absence of an LFO limits its modulation options slightly, and users seeking those effects might prefer the original Monotron. Despite this, at an affordable price, the Duo remains a strong choice for those exploring Korg's analog soundscape, albeit with some feature drip-feeding frustration.

positive

Korg Monotron Duo review | Juno Daily

juno.co.uk

Korg's Monotron Duo packs a punch in a tiny package, with dual oscillators and the classic MS20 filters delivering surprisingly rich and full tones. Its compact design and versatile scale modes make it a portable, fun, and creative synth for on-the-go musicians. However, its toy-like appearance and reliance on AAA batteries may deter some. Despite these drawbacks, it's a welcome nod to Korg's analog roots in a digital age.

positive
Add

4.0 out of 5

Based on 13 Reviews and 79 Ratings

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daughteroffiat500

useless but it doesn't matter

this is just nostalgia but I used to keep this in my jacket pocket when I went to catholic school and I was like 13. Very fun although basic and useless for anything but like noise or techno if you are like an insane producer, very very fun and cute though. I loved mine although it is broken now. :(

varial

Love it.

It may look like a cheap toy, but when You connect It to Your audio interface, It's sitting in the mix, and more! If You are creative, and really know what to do with It, It sounds fire!!

In this particular model of Monotron's, (cause I have bought one, and after a while, I collected Them all!!) I Love the crossmode, when pitch of one oscillator affects the other.

Its fun, when You have each of Them, cause They have the AUX in, so if You have enough cables, and maybe some splitters, You can connect everything - to everything. I even chose to buy some more splitters than I needed yet, and It felt so right, while I sequenced Them all with SQ-1.

Definately recommended.

So, great thanks to KORG, for all of Their Projects, and cheers to all of You!!

Kontersky HxN_d:LV

PS: Check this Tune I made, with almost nothing more than Volca's, and Monotron's.

https://soundcloud.com/nie-ma-mnie/kamil-kontowicz-purification-resonans

jimmarchi1

hours of fun you can take anywhere

a battery powered little analog synth? for what I paid used this is a no brainer. Its nonstop enjoyment. Dual oscillators make this the most interesting little noisemaker of the monotron family. Sounds a lot like my volca bass without the envelope generator. So simple even my toddler enjoys it. Its been a great way to introduce him to synthesizers. My one caveat is the ribbon controller which is tought to play even for a guy with thin fingers like me, but its more of a noisemachine than a tuned instrument, so whatever. So much fun.

So far I have only used the MS20 filter to process external audio in my recordings, but in that roll it excels and offers a different flavor than my 2 Moog filters with the ability to process a guitar, bass or whatever... the battery power makes it a great guitar effect. You can just set it anywhere. Setting up the Moogs as effects units is a chore.

digitalwint3r

Amazing little piece of hardware! Once again Korg has amazed me with their another one of their astonishing products.

This is great for playing around with for fun and for interesting sounds. I usually play with it when I have breaks from my studio sessions. It's my first synthesizer and it's quite durable and easy to use highly recommend it to everyone even those with no knowledge of the art of synthesis. It has VCOs but also the filter is BOSS!

chemfast

No mention of drumkit mics time alignment.

str8sounds

Mind-blowing synth engine contained in pocket synth smallness.

These ribbon synths that fit in your vest pocket are wild performers of sonic mayhem. The Duo gives you blaring analogy synth voices with easy ways to tweak and warp the sound. Playing these little guys on stage is dramatic, all that noise screaming out of a tiny device, as you twirl knobs and rub your finger across the ribbon keyslide.

sounds_past_midnight

Fun, but get the monotron delay

cool analog synth with 2 vcos, cross mod and a resonating analog filter. BBD on the monotron delay makes it more fun.

faketuxedo

Great for the price.

You can create some really cool sounds with this. The lack of midi capability, and the amount of controls is very limiting.

southern

Chiptunes in your pocket

I dig the ability to make wild cross modulation sounds in pocket form!

adamfiregate

First analog synth experience with powerful features

My first simple, but real analog synth. Two VCOs and cross modulation. The filter is also a beast.

txufowilson

Analog in a pocket

Brutal MS-20 filter in a small pocket VCO.

Artist usage

Add artist
See how Deorro uses Korg Monotron DUO Analog Ribbon Synthesizer

Deorro

Music Producer, DJ

...
Verified via Photo

Spotted in an Instagram photo Deorro posted of some gear during a studio session.

See how King Krule uses Korg Monotron DUO Analog Ribbon Synthesizer

King Krule

Singer, Guitarist

...
Verified via Photo

In a photo from King Krule's Instagram, a Korg Monotron DUO Analog Ribbon Synthesizer is visible, identifiable by the distinctive yellow highlight on one of its knobs.

See how Virtual Riot uses Korg Monotron DUO Analog Ribbon Synthesizer

Virtual Riot

Music Producer, DJ

...
Verified via YouTube

At 2:50 in Virtual RIOT's "Studio Time #2", it is quite blurry but you can make out a Korg Monotron DUO Aanalog Ribbon Synthesizer.

See how Rival Consoles uses Korg Monotron DUO Analog Ribbon Synthesizer

Rival Consoles

Music Producer, DJ

...
Verified via Photo

Can be spotted at the very left of the picture

See how Legowelt uses Korg Monotron DUO Analog Ribbon Synthesizer

Legowelt

Music Producer

...
Verified via YouTube

You can find it at 0:14!

See how Celldweller uses Korg Monotron DUO Analog Ribbon Synthesizer

Celldweller

Singer, Guitarist

...
Verified via YouTube

At 4:54 in the video in which Celldweller shows off his studio to Future Music Magazine he says ". . . the DUO, which is a two oscillator synth" while holding the synth in his hands.

See how AMULETS uses Korg Monotron DUO Analog Ribbon Synthesizer

AMULETS

Guitarist, Music Producer

...
Verified via Amuletsmusic

"Finally finished stuffing my new ambient drone setup into this vintage suitcase. The 4 track recorder is played like an instrument using tape loops and also acts as a mixer for 3 other incoming tape signals (samples, loops, and a microcassette). I also added a concert mate 200 keyboard for live swells and additional improvised harmony. All I need now Is a weird art show to play at…"

See how emma essex uses Korg Monotron DUO Analog Ribbon Synthesizer

emma essex

Composer, Music Producer

...
Verified via BandCamp

HARDWARE: KORG microKORG, KORG Monotron Duo, KORG Monotron Delay, Roland Lucina, AKAI MPD26, Catalinbread Teaser Stallion, Behringer Ultra Tremolo UT100, Behringer Ultra Shifter US600, Biying Tri Reverb RV-10, Electro-Harmonix Voice Box, Electro-Harmonix Freeze, Roland DR-50 mic, Behringer UBB1002 mixer

See how Tom Cosm uses Korg Monotron DUO Analog Ribbon Synthesizer

Tom Cosm

Music Producer

...
Verified via Photo

Tom Cosm uses the Korg Monotron DUO Analog Ribbon Synthesizer, as shown in a photo on his Facebook page.

See how Sonique (Colombia) uses Korg Monotron DUO Analog Ribbon Synthesizer

Sonique (Colombia)

Music Producer

...
Verified via Photo

Use it in studio for effects and for its lowpass filter

See how Fumio Kosakai uses Korg Monotron DUO Analog Ribbon Synthesizer

Fumio Kosakai

Guitarist, Composer

Hijokaidan

...
Verified via Twitter

In this gear photo, you can see the Korg Monotron DUO Analog Ribbon Synthesizer on the table used by Fumio Kosakai.

See how Perc uses Korg Monotron DUO Analog Ribbon Synthesizer

Perc

Music Producer, DJ

...
Verified via Attack Magazine

Can be seen in this photo by Attack Magazine

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

Used With

Based on how musicians on Equipboard use Korg Monotron DUO Analog Ribbon Synthesizer, it is most commonly used with the following gear.

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Gear IQ 101

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