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MicroKORG
MicroKORG
MicroKORG
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The original microKORG
The microKORG XL

The microKORG is a MIDI-capable digital synthesizer/vocoder from Korg featuring DSP-based analog modelling. The synthesizer is built in such a way that it is essentially a Korg MS-2000 with a programmable step arpeggiator (the MS-2000 has only six simple patterns), a less advanced vocoder (8 bands instead of 16 bands on the MS-2000), lack of motion sequencing (MS-2000 had three motion sequences), lack of an XLR microphone input, and in a smaller case with fewer real-time control knobs.

The microKORG was released in 2002 and is still in production as of 2022. It has sold an estimated 100,000 units sold as of May 2009[citation needed]. In September 2007 Korg released a limited edition of the microKORG with reverse-color keys, although the functionality was otherwise unchanged. At NAMM 2008, a successor dubbed the microKORG XL was introduced.[1] Available since early 2009, it uses Korg's MMT (Multi Modeling Technology) engine, borrowed from the newer and more powerful Radias/R3 synthesizers. Also, in late 2016, a slightly updated version was released, dubbed the MicroKORG S. This edition retains the same sound engine as the original MicroKORG, but offers an integrated speaker system (stereo + sub), updated color scheme & twice the patch memory. In 2022, a VST Version was released as part of the Korg Collection. [2]

Synthesis

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The microKORG features a DSP-based synthesis engine, designed around the same engine found in the Korg MS2000. In Korg's terminology, the fundamental unit of sound is referred to as the "timbre". Each timbre consists of a pair of multi-function oscillators. Two timbres can be combined in one patch to create a four-oscillator "layer", which can in turn be used to create more complex sounds (although doing so halves the polyphony from four notes to two)[3] Oscillator one (OSC1) can produce one of several virtual analog-style waveforms, including sawtooth, square, triangle, and sine waves. Alternatively, OSC1 can produce a so-called "VOX" wave (which simulates human vocal formants), white noise, and one of 64 different digital waveforms created via harmonic additive synthesis. Some of these 64 waveforms (which are really single-cycle wavetables) were originally featured in the Korg DW-6000 & DW-8000 digital-analog hybrid synthesizers of the mid 1980s. The second oscillator (OSC2) is limited to sawtooth, square, and triangle waveforms.

microKORG Saw Wave
microKORG Square Wave
microKORG Triangle Wave
microKORG Sine Wave
microKORG Vox Wave
microKORG Digital Wave (64 values)
microKORG White Noise
Demonstration of the microKORG being played. These samples are taken from the song 'Radio', by British synthpop band Emile's Telegraphic Transmission Device. We hear organ chords, a melody played on three presets, a middle eight; also on three presets and a synth bass preset.

Each waveform on OSC1 has a unique modulation feature, including wave morphing, Pulse-width modulation, and FM. OSC2 can be detuned, synchronized, and/or ring-modulated with OSC1 in order to create more complex sounds. OSC1 can also be replaced with the signal from one of the line-level inputs on the back of the unit, allowing for external signals to be processed as if they were an oscillator (via the filters, effects, or even ring-modulated by OSC2).

For further shaping of the sound, the microKORG offers several types of digital filters, including Low Pass (-12dB/Oct and -24dB/Oct), Band Pass (-12dB/Oct), and High Pass (-12dB/Oct) modes.[4]

Additionally, the unit provides a number of built-in effects, such as flanger, ensemble (chorus), phaser, and digital delay, all of which can be applied to external signals. For modulation, there are two independent LFOs, with six different waveforms, allowing for the creation of more complex, time-varying patches.

When playing a single timbre, the keyboard is limited to four-voice polyphony. In layer mode it generally has only two-voice polyphony, although one combination of polyphonic/mono layers allows for effective three-voice polyphony of the second timbre.

The microKORG groups its 128 factory preset sound patches into 8 groups:

A large knob changes the selected sound group. Each group has 16 different patches (two banks of eight); the active patch is selected by the eight LED-illuminated buttons on the front panel, while the accompanying A/B switch toggles between the two banks. All patches are user editable, and do not necessarily have to align with the genre groupings listed on the faceplate.

microKORG S

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In 2016, Korg reissued the microKORG as the modified 'microKORG S'. This edition retains the engine and features of the original microKORG (as opposed to the XL/XL+, see below), but includes a new lighter-colored housing, built-in speakers, twice the original patch memory (256 slots) and a Favorites feature to assign 8 patches to the program buttons for easier selection.

microKORG XL

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microKORG XL
0px

The direct successor to the microKORG, the 'microKORG XL', utilizes the MMT (Multi Modelling Technology) engine, and is based on Korg's own R3 synthesizer.[5] The XL features a brand-new LCD display and two large Program Select knobs for easier patch access, though has fewer real-time controls than the original microKORG.

The microKORG XL groups its 128 factory preset sound patches into 8 groups:

and several sub categories:

New features specific to the microKORG XL

[edit]

Notably, the 'microKORG XL' features 17 different KAOSS derived effects, including phaser, flange, decimation, vibrato, tremolo and retrigger. The XL also features several included PCM Waveforms, including Piano, Brass Ensemble, nine Electric Piano and Clavinet, seven organ sounds (one of which emulates the Korg M1 Organ), a full String Orchestra, two variable formant waves and more than 32 digitally generated waveforms (SYNWAVE 6 is a ramp wave/inverted sawtooth). The XL adds two additional Waveform Modulation types: Phase Modulation and Unison (in which five stacked oscillators within 1 oscillator can be detuned and phased to achieve a richer sound.) The Unison Simulator is similar to the Supersaw waveform on the Roland JP-8000. The included "OSC MOD WAVEFORM" and "OSC2 SYNC" controllers are reminiscent of the Poly-Mod feature in the Sequential Circuits Prophet-5. The microKORG XL also includes a waveshaper (uncommon in most synthesizers) which will morph the current waveform into an approximation of the waveform desired, resulting in a harsh sound. The waveshaper also includes a third oscillator (Sub oscillator.)

Additional improvements include:

  • Polyphony increased up to eight notes
  • Vocoder increased to 16 bands, but still supports the 4 note polyphony
  • USB connector for MIDI over USB operation
  • "Split" and "Multi" added to Voice modes
  • The option to use ten scales, including one defined by the user.
  • "Analog Tune" simulates the pitch instability and oscillator “drift” that was characteristic of vintage analog synthesizers

Korg RK-100S

[edit]

In 2014, Korg announced the RK-100S keytar, which is essentially a 37-key "keytar" version of the 'microKORG XL+', with many external differences and only two internal differences. On the inside, it sports the same exact features as the 'MicroKorg XL+', except it has 200 program storage instead of 128, and allowing for the long ribbon controller to serve as a modulation source. Externally the RK-100S is radically different, it lacks the ability to edit programs from the unit. Editing may only be done via a control app available for Mac and PC, and if one is daring enough, it is technically possible to create ones own editor using the available MIDI messages chart. 'MicroKORG XL' and 'XL+' patches may be downloaded into the unit one-by-one or en-masse, allowing patch editing to be done on a 'microKORG XL+'.

Notable external differences of the RK-100S

[edit]
  • Lacks the XLR mic input and dual quarter-inch mono output jacks of 'microKORG XL+', instead featuring a stereo 1/4" TRS jack and mono 1/8" audio input jack, switchable between three gain levels (Line, Mic1, Mic2)
  • Adds a short and long ribbon controller, and buttons that toggle the behavior of the ribbons (e.g. between modulation of pitch or frequency, although other things can be modulated)
  • Sports a 37-key keyboard of "mini" keys as on the MS 20 Mini; these are larger than microKORG'S keys but much thinner than traditional keys
  • Has five banks of "favorites" selectable with five LED-backlit buttons; these buttons serve as a level meter for output volume during normal performance
  • A multipurpose up/down lever switch used for selecting between programs, banks, adjusting tempo, etc.
  • Wooden body with very fragile glossy lacquer paint that is very easy to chip or crack should the unit bump into anything hard
  • Double the battery life for a set of 4 alkaline AA batteries (8 hours instead of 4 on the microKORG XL+), according to Korg's documentation.

Even though the RK-100S is not marketed as a microKORG, the fact that its synthesis engine is identical makes it ideal for microKORG users wishing to perform live without needing to have a keyboard stand restricting their movement around a stage.

References

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Further reading

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Revisions and contributorsEdit on WikipediaRead on Wikipedia

MicroKORG

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The microKORG is a compact, portable and produced by , first released in 2002 as a battery-powered instrument designed for musicians seeking versatile in a small form factor. Featuring 37 velocity-sensitive mini keys and weighing under 5 pounds, it utilizes Korg's DSP-based MMT (Multiple Modeling Technology) synthesis engine to emulate classic analog synthesizers from brands like Moog, ARP, and Sequential Circuits, offering two oscillators, a multimode filter, envelope generators, LFOs, and virtual patching for complex sound creation. The instrument includes 128 editable preset programs organized into banks for genres such as , , , and hip-hop, alongside a freely programmable arpeggiator and a suite of effects including chorus, flanger, phaser, delay, and reverb. Its built-in eight-band , complete with a gooseneck and external audio inputs, allows for real-time vocal processing and external signal modulation, contributing to its appeal in live performances and electronic music production. Priced at an accessible MSRP of $500 upon launch, the microKORG quickly became one of the best-selling synthesizers in history, praised for its intuitive interface—controlled via dedicated knobs for key parameters like filter cutoff and resonance—and MIDI implementation for integration with other gear. Despite initial criticisms of its mini keys and limited onboard controls, its retro-inspired design with faux wood paneling and distinctive blue styling has endured, influencing modern music across genres from pop to hip-hop. Over the years, expanded the line with variants like the 2009 microKORG XL (featuring enhanced polyphony and the Kaoss Pad), the 2016 microKORG S (with built-in speakers), and the 2023 microKORG 2 (adding a color display and loop recorder), while a limited platinum edition marked its 15th anniversary in 2017. The original model, now discontinued, remains a staple in studios and on stages due to its reliable tuning, sound quality, and role in democratizing analog-style synthesis.

Overview and History

Introduction and Development

The microKORG is a compact virtual and that employs DSP-based modeling technology to emulate classic analog sounds, drawing direct inspiration from Korg's earlier MS-2000 model by adapting its core sound engine into a more portable format. Released in 2002 by Inc., the original microKORG was designed with goals of enhancing portability, affordability, and ease of use, targeting both novice musicians and live performers through features like its lightweight build, battery-powered operation, and 37 velocity-sensitive mini-keys. By May 2009, the microKORG had achieved significant commercial success, with approximately 100,000 units produced. In 2007, to mark the model's fifth anniversary, Korg issued a limited-edition version featuring reverse-color keys (black keys on white), with production limited to around 300 units. The microKORG product line has evolved through several key variants, reflecting advancements in synthesis and :
  • 2002: Original microKORG release.
  • 2009: microKORG XL, introducing an updated Multi Modeling (MMT) engine and larger display.
  • 2012: microKORG XL+, adding new , aesthetic refinements, and expanded program categories.
  • 2014: RK-100S , a performance-oriented model with the microKORG's synthesis in a strap-on format.
  • 2016: microKORG S, featuring built-in speakers and additional .
  • 2020: RK-100S 2, an enhanced with improved controls and finishes.
  • 2024: microKORG 2, incorporating modern multi-engine synthesis and a interface.

Commercial Impact

The microKORG, released in , achieved significant commercial success as one of the best-selling synthesizers in history, driven by its affordability and accessibility for musicians across genres. Priced around $400–$500 at launch, it appealed to beginners and professionals alike, becoming a staple in indie, electronic, and production due to its distinctive analog-modeling sounds and built-in . Its enduring popularity stems from widespread adoption in live performances and studio recordings, where it provided reliable, portable sonic options without requiring extensive setup. The instrument's longevity underscores its market impact, remained in production for over two decades until its discontinuation, while still being actively sold through retailers as of 2025, making it one of the longest-running lines. Initial reviews praised its compact design, battery-powered operation (using six AA alkaline batteries for approximately 4 hours of use), and gig-friendly portability, which facilitated easy integration into band setups and solo performances. However, critics at the time noted drawbacks such as the tiny 37-mini-key keyboard, which felt cramped for , and the limited number of physical knobs for real-time control, often requiring menu diving for adjustments. Retrospectively, these concerns have been overshadowed by acclaim for its build reliability and the vocoder's intuitive appeal, contributing to its status as a dependable workhorse instrument. Key milestones highlight the microKORG's sustained relevance, including the 2017 release of a limited-edition platinum model to commemorate its 15th anniversary, featuring a stylish silver finish while retaining the core design. In 2022, the marked its 20th anniversary with widespread retrospectives celebrating its cultural footprint and ongoing sales momentum. The microKORG's influence extended beyond individual sales, sparking a broader trend toward compact, affordable synthesizers in the early market, where larger, more expensive instruments had previously dominated. Its low entry barrier and versatile sound palette encouraged experimentation among emerging artists, fostering a proliferation of portable gear that prioritized immediacy and mobility over complexity. This shift helped democratize synthesizer ownership, sustaining the instrument's appeal through economic accessibility and practical features like battery operation.

Original Model

Design and Controls

The original microKORG, released in 2002, features a compact and portable design optimized for musicians seeking a lightweight /vocoder suitable for stage and studio use. Measuring 524 mm in width, 232 mm in depth, and 70 mm in height, it weighs 2.2 kg excluding batteries and the included , allowing easy transport without sacrificing functionality. The body adopts a distinctive beige-gold accented by wooden side panels, contributing to its retro aesthetic while the sturdy construction ensures durability during performance. Power is supplied via a DC 9V or six AA alkaline batteries, providing approximately four hours of operation for enhanced mobility in battery-powered scenarios. The keyboard consists of 37 velocity-sensitive mini-keys, spanning three octaves with additional octave shift capabilities (±3 octaves) for broader range access, though it lacks aftertouch. This compact keybed prioritizes playability in a reduced footprint, making it ergonomic for live manipulation despite the smaller key size. User controls emphasize intuitive real-time editing and performance, centered around five assignable knobs that handle parameters such as pitch, oscillator, filter, and effects, selectable via dedicated edit select knobs for quick adjustments. A provides pitch bend and modulation control, while additional buttons—including program selectors, shift, bank, arpeggiator on/off, and write—facilitate program navigation and storage. The interface includes a 3-digit, single-line 8-segment for viewing program numbers, parameter values, and status messages. For vocoder use, a dedicated condenser gooseneck is included, connecting directly to the audio input for flexible positioning during vocal processing. MIDI implementation supports editor and librarian software compatibility, enabling sound organization and detailed parameter editing via SysEx data transfer through MIDI IN/OUT ports, as provided by Korg's official microKORG Sound Editor application.

Core Specifications

The original microKORG /vocoder features a maximum of 4 voices in single mode, reducing to 2 voices when operating in dual layer mode where two timbres are combined. It provides 128 editable and user-rewritable programs, organized across 8 banks of 16 programs each, with factory presets categorized into genres such as , , , Drum 'n' Bass/Breaks, Hip-Hop/Vintage, Retro, Sound Effects/Hits, and for intuitive sound selection. Connectivity includes MIDI IN/OUT/THRU ports for integration with other equipment, dual AUDIO IN jacks (switchable between LINE and MIC levels for external signals), stereo OUTPUT jacks (L/MONO and R via 1/4-inch connectors), and a dedicated output. Power options consist of a DC 9V (included) or six AA alkaline batteries for approximately 4 hours of operation, with a maximum power consumption of 6.4 W; the unit delivers stereo audio output but lacks built-in speakers. The keyboard spans 37 velocity-sensitive mini-keys covering a 3-octave-plus range from F to F, enabling expressive play without aftertouch. Standard accessories include a gooseneck condenser for vocoding and an .
SpecificationDetails
Polyphony4 voices (single timbre); 2 voices (dual timbre layer mode)
Memory128 programs (8 banks × 16); fully editable and rewritable
Keyboard37 velocity-sensitive mini-keys (F–F range)
ConnectivityMIDI IN/OUT/THRU; AUDIO IN 1/2 (1/4" jacks, LINE/MIC switch); OUTPUT L/MONO, R (1/4" jacks); (1/4" jack)
PowerDC 9V adapter (included) or 6× AA batteries (~4 hours); 6.4 W max consumption; stereo output, no speakers
Presets8 categories (e.g., , /, )
AccessoriesGooseneck condenser mic;

Synthesis Engine

Sound Generation

The microKORG employs a DSP-based analog modeling synthesis engine, enabling the creation of sounds that emulate classic analog synthesizers through . This system supports up to two timbres, which can be layered to stack sounds for richer textures. With a of four voices, the engine allows for versatile sound design within its compact framework. At the core of each timbre are two oscillators, providing foundational tone generation. The first oscillator (OSC 1) offers a selection of waveforms including sawtooth, square, triangle, sine, noise, a VOX reed wave modeled after vintage organ tones, and 64 DWGS (Digital Waveform Select) waveforms drawn from Korg's legacy synthesizers for added variety. The second oscillator (OSC 2) is limited to sawtooth, square, and triangle waves but can be tuned independently in semitone increments. Modulation options enhance expressivity: OSC 2 can synchronize to OSC 1 for classic hard sync effects, apply ring modulation for metallic timbres, or combine both; additionally, cross-modulation akin to frequency modulation (FM) is available between the oscillators. Pulse-width modulation (PWM) is also supported on square waves. Following the oscillators, the signal passes through a multimode filter section per timbre, shaping the harmonic content. The filters include a resonant low-pass filter at 12 dB/octave slope, as well as high-pass and band-pass variants at the same slope; a steeper 24 dB/octave low-pass option is available for more aggressive cutoff characteristics. Resonance can drive the filter into self-oscillation, and modulation sources such as the filter envelope, keyboard tracking, and velocity allow dynamic control over cutoff frequency and resonance. Amplitude and filter contouring are handled by dedicated ADSR (Attack, Decay, Sustain, Release) envelope generators, one each for amplitude and filter per timbre. Each parameter ranges from 0 to 127, enabling precise shaping from sharp percussive attacks to smooth, evolving sustains. An envelope reset option ensures consistent triggering, while velocity sensitivity adds performance nuance. Modulation depth is further expanded by two low-frequency oscillators (LFOs) per , with LFO 1 offering sawtooth, square (including half-width variants), , sine, and sample-and-hold waveforms, and LFO 2 providing similar options including a positive-only square. These LFOs can be key-synced to or voice, tempo-synced to the arpeggiator or external clock, and routed via virtual patching to destinations such as pitch, filter cutoff, , and pan for evolving, animated sounds. The arpeggiator functions as a step sequencer with six editable modes—Up, Down, Alternate 1, Alternate 2, Random, and Trigger—allowing patterns of up to eight steps. Parameters include step resolution (from 1/24 to 1/4 note), gate length (0-100%), tempo (20-300 bpm), range (1-4 octaves), and swing, with individual steps toggleable on or off for rhythmic complexity.

Vocoder and Effects

The microKORG's is an 8-band design utilizing 16 bandpass filters in pairs to analyze and synthesize vocal s, enabling classic robotic vocal effects through the included miniature condenser connected to the AUDIO IN 1 jack. This setup supports 4-voice in vocoder mode, allowing simultaneous chordal playing with vocal modulation. The input serves as the modulator for formant shifting, while the carrier signal can derive from the internal oscillators or noise generator, or an external audio source via the AUDIO IN 2 jack. Additional features include a Formant Hold function to sustain vocal formants independently of the input and adjustable channel levels and panning for each of the 8 bands. The effects section complements the and synthesis engine with a multi-stage processing chain applied post-filter. Modulation effects offer three types—chorus/flanger, phaser, and ensemble—each with parameters for LFO speed and depth to add movement and width to sounds. Delay effects include three variants: stereo delay, cross delay, and L/R delay, which can synchronize to the arpeggiator tempo or external clock, and are positioned after modulation for spatial enhancement. A 2-band equalizer follows the delay stage, providing low-frequency (40 Hz to 1 kHz) and high-frequency (1 kHz to 18 kHz) shelving adjustments with up to ±12 dB gain for final tonal shaping. In program structure, these effects are integral to each of the 128 editable programs, shared across single or layered s in a fixed : timbre outputs mix into modulation effects, then delay, and finally EQ before stereo output. For vocoder programs (16 dedicated presets), the chain processes the modulated carrier signal similarly, with the gooseneck enabling real-time vocal input integration. All parameters are accessible and editable via the front-panel knobs for intuitive .

Successor Models

microKORG S

The microKORG S, released in September 2016, represents a refreshed of the original microKORG /, introducing aesthetic updates and convenience features while maintaining the core analog modeling synthesis . Priced at approximately $499 USD upon launch, it targeted musicians seeking a portable, stage-ready instrument without altering the fundamental sound generation capabilities. Key design enhancements include an elegant white body with light wood side panels, providing a modern visual contrast to the original's darker finish, alongside the retention of the compact form factor with 37 slim, velocity-sensitive mini-keys and familiar control layout. A notable addition is the integrated 2+1 speaker system—comprising two 0.5 stereo speakers (3.5 cm each) and one 3 woofer (4 cm)—equipped with a port for enhanced low-end response and tactile vibration through the , enabling standalone playback without external amplification. The unit weighs 2.5 kg (excluding batteries and ), supports battery operation for up to approximately 4 hours with six AA alkaline batteries, and includes a gooseneck condenser for vocoder use. Memory capacity has been expanded to 256 programs, comprising 192 presets (including 64 new ones tailored for contemporary genres like EDM and hip-hop) and 64 user slots, compared to the original's 128 programs, with a new Favorites function allowing quick access to up to eight registered programs via dedicated buttons. These updates prioritize portability, ease of use, and visual appeal for live performances and casual jamming, without any modifications to the synthesis parameters or effects processing.

microKORG XL and XL+

The microKORG XL, introduced in 2008 and available from early 2009, represented a significant evolution in Korg's compact lineup by incorporating the MMT (Multiple Modeling Technology) synthesis engine derived from the R3 and RADIAS models. This engine enabled analog modeling, synthesis, virtual physical modeling (VPM), and digital waveforms, providing a broader sonic palette than its predecessor while supporting up to 8-voice in standard mode. When engaging the function, reduced to 4 voices to accommodate the 16-band processing, which included adjustable levels and panning per band along with shift capabilities. The XL featured a redesigned measuring 556 mm in width, larger than the original model, paired with a 37-note Natural Touch mini-keyboard that offered velocity sensitivity for more expressive play despite its compact form factor. Key enhancements included USB connectivity for seamless integration with computers, a dedicated PCM/DWGS wave generator for drum samples and expanded waveforms, and 17 touchpad-style effects inspired by the Kaoss Pad series, such as delays and modulations applied via a simple X-Y pad interface. The unit shipped with 128 editable programs organized for quick access, alongside a gooseneck for vocoding and battery operation using six AA batteries for portability. In 2012, released the microKORG XL+ as a refreshed version retaining the same MMT engine and core specifications but introducing expanded preset options tailored for keyboardists, including 128 total programs across eight categories such as , electric piano, organ, and guitar sounds derived from classics like the KORG SGproX , M1 organ, and VOX organ. These additions emphasized editable programs with new vintage and "tape"-style instrument emulations, enhancing versatility for live performance and studio use without altering the underlying , , or effects architecture. Aesthetic updates included a black "new vintage" panel finish, colored control pads for improved visibility, and limited-edition color variants like full black or black-and-red keyboards, while maintaining the 556 mm width and velocity-sensitive keys. The XL+ thus bridged the gap between the XL's technological upgrades and modern genre-based sound selection, appealing to performers seeking immediately accessible keyboard-focused timbres.

microKORG 2

The microKORG 2 is a 37-key virtual analog synthesizer and released by in June 2024 as the latest successor to the original microKORG line. Priced at $699 USD upon launch, it features velocity-sensitive mini-keys and maintains the compact, portable design of its predecessors while introducing a modernized sound engine and user interface. This model emphasizes enhanced programmability and live performance capabilities, targeting musicians seeking an affordable entry into analog modeling synthesis with integrated vocal . The sound engine employs virtual analog modeling to emulate classic analog circuitry, supporting up to three oscillators per with waveform options including sawtooth, square, , sine (with PWM), 64 DWGS digital s, and 32 One Shot PCM waves for added versatility. In single timbre mode, it achieves 8-voice , reducing to 4 voices in dual timbre mode for layered sounds; mode supports 4 voices. Firmware version 2.0 adds logue SDK compatibility, allowing users to load custom oscillators and effects, effectively enabling personalized imports including PCM-based designs. Key features include a 16-band with shift and variable level/pan controls, building on the legacy of 's vocal synthesis heritage, alongside a built-in loop recorder for capturing and synth or vocal audio in real time—enhanced in firmware 2.0 with step recording, slicing, and file import/export functions. The instrument offers 256 programs organized into 4 banks across 8 categories, with a 2.8-inch full-color TFT IPS LCD display providing visual feedback for editing and parameter adjustments. Additional vocal processors encompass Hard Tune (1 part) and Harmonizer (2 parts) modes. Connectivity options comprise USB Type-C for MIDI and data transfer, standard 1/4-inch TS outputs (L/Mono, R), a 1/4-inch TRS headphone jack, In/Out via 5-pin DIN, and inputs for condenser/dynamic microphones plus AUX. It supports battery operation with six AA alkaline or Ni-MH batteries, providing approximately 4 hours of use, or an included 9V DC adapter; no built-in speakers are included, requiring external monitoring. Performance upgrades feature an enhanced arpeggiator with 10 patterns (e.g., Up, Down, Random) and an 8-step sequencer for rhythmic development, alongside modulation, delay, reverb, and EQ effects controllable in real time. These elements facilitate dynamic and sound manipulation without external gear.

Keytar Variant

RK-100S

The RK-100S is a keytar synthesizer released by Korg in June 2014, serving as a modern revival of the company's original 1984 RK-100 remote keyboard while incorporating the analog modeling synthesis engine from the microKORG XL series. Designed for portable, standing performances, it features a guitar-like body with a lacquered wooden construction, available in glossy red, black, or white finishes, and includes a neck strap for hands-free mobility during play. At its core, the RK-100S offers 8-voice with support for up to two , drawing from Multiple Massive Modeling Technology (MMT) for sound generation via two oscillators per timbre, enabling a range of analog-modeled tones across 200 built-in programs. It includes a 16-band for vocal effects processing through a dedicated mic/audio input, alongside an arpeggiator and modulation options like dual ribbon controllers—one short for pitch bend and one full-length for modulation and expression—enhancing performative control. Connectivity is provided via USB Type B for interfacing with computers, a MIDI OUT jack for external modules, and a headphone/line output, but it lacks built-in speakers to prioritize its lightweight 4.0 kg (8.8 lb) form factor. Powering the instrument are six AA alkaline batteries, offering approximately 8 hours of operation, or an optional DC 9V AC adapter for extended sessions, making it ideal for on-stage use without reliance on external power sources. The 37 slim, velocity-sensitive keys are arranged in a compact 830 x 262 x 71 mm (32.7 x 10.3 x 2.8 in) chassis, optimized for ergonomic play while standing, distinguishing it from tabletop models by emphasizing mobility and integrated expression tools over stationary audio output.

RK-100S 2

The RK-100S 2 is a 2020 refresh of Korg's RK-100S , announced at the that year, emphasizing aesthetic upgrades and an expanded selection of presets while preserving the original's core design and synthesis capabilities. It utilizes the same Multiple Modeling Technology (MMT) sound engine derived from the microKORG XL series, delivering analog modeling synthesis suitable for live performances. This update prioritizes visual enhancements and user convenience without introducing significant hardware or sonic overhauls. Key aesthetic improvements include translucent body options in red and black finishes, which reveal the underlying woodgrain for a more striking stage presence, alongside a refined wooden body construction that improves durability and finish quality. The instrument retains the ergonomic elements of its predecessor, such as the 37 slim, velocity-sensitive keys and dual controllers for pitch bend, modulation, and filter control. Battery life remains at approximately 8 hours using six AA alkaline batteries, supporting portable use, with an optional available. In terms of sound resources, the RK-100S 2 offers 200 built-in programs, featuring newly added presets optimized for modern genres like electronic and rock leads to enhance versatility for soloists. An enhanced favorites system allows users to store up to 40 programs across five banks for quick access during performances. The vocoder section is unchanged, providing a 16-band processor with adjustable levels, panning, shift, and hold functions, limited to 4-voice when active, alongside the standard 8-voice for synthesis. USB Type B connectivity enables output for controlling external devices and integration with Korg's dedicated sound editor software for program management.

Software Emulation

Korg Collection Version

The microKORG software emulation, released on November 23, 2022, as part of Korg's KORG Collection 4 suite, provides a digital recreation of the original 2002 hardware synthesizer in VST, AU, and AAX plugin formats for Mac and Windows. This plugin faithfully models the analog synthesis engine of the original microKORG, including its dual oscillators, multimode filter, amplifier sections, effects, arpeggiator, and vocoder capabilities, allowing users to produce the same warm, versatile tones in modern digital audio workstations (DAWs). Designed to celebrate the hardware's 20th anniversary, it supports native operation on Apple Silicon (M1 and later) chips, ensuring efficient performance without Rosetta emulation. Key features include 192 built-in presets drawn from the original microKORG and its S variant, organized via a program browser that categorizes them by model or genre for quick access during production. The integrated simulates microphone input through audio routing in the host DAW, employing an 8-band processing chain, matching the original hardware, with adjustable hold, filter frequency, modulation, level, and panning controls to enable classic vocal effects. An intuitive (GUI) mirrors the hardware's panel layout while adding software enhancements like an for visualization and deep parameter editing, bridging the original's tactile design with precise digital control. As a component of the Collection, the microKORG plugin integrates seamlessly into broader workflows, functioning as a standalone application or DAW insert, with learn for external controller mapping and compatibility with the suite's librarian for preset management. Post-release updates have enhanced its reliability, including stability improvements and performance optimizations in early 2023, followed by the addition of new sound programs in December 2023 to expand creative options. These updates are provided free to existing users, maintaining compatibility with evolving OS versions and DAW environments. Compared to the physical instrument, the plugin eliminates the need for onboard keys or knobs, relying instead on MIDI keyboards or controllers for input, which facilitates easier integration into studio setups. It offers advantages like polyphony up to 64 voices—far exceeding the hardware's monophonic limitations—and inherently lower latency when hosted in a DAW, enabling real-time performance and overdubbing without the audio monitoring delays common in hardware routing. This shift prioritizes workflow efficiency for software-centric producers while preserving the core sonic character of the original's MMT (Multiple Modeling Technology) synthesis.

Integration and Updates

The microKORG software emulation, part of the Collection plugin bundle, integrates with major digital audio workstations (DAWs) including and via its compatibility with , VST3, and AAX formats. It also functions in standalone mode, allowing operation independent of a DAW for quick or live performance scenarios. Additionally, the plugin supports synchronization for LFO rates and arpeggiator tempos, enabling tempo-locked integration with external hardware or software sequencers. Since its debut in Korg Collection 4 in late 2022, the microKORG emulation has received ongoing support through Collection-wide updates, including enhancements for stability and compatibility in versions 5 and 6. Version 6, released on October 28, 2025, expanded the bundle to 20 instruments, ensuring the microKORG plugin remains optimized for modern macOS and Windows systems without specific bug fixes detailed for it alone. The emulation includes 192 factory presets, combining programs from the original microKORG hardware and its microKORG S variant, accessible via an intuitive program browser categorized by model and genre. Priced as part of the Collection 6 bundle at a special rate of $299 (regular $399), the microKORG plugin offers value through access to a comprehensive suite of emulated instruments, with upgrade paths available for prior Collection owners at discounted rates. This bundling supports producers seeking a cost-effective, software-only that bypasses hardware maintenance issues like tuning drift or physical wear common in the original 2002 . In production contexts, the plugin's dual synth and modes, with up to 64-voice , facilitate seamless layering in electronic music tracks or vocal processing chains, appealing to users prioritizing portability and reliability over analog warmth. connectivity further enhances its utility by allowing tone data transfer to and from compatible hardware units, bridging software and physical setups.

References

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  29. https://www.thomannmusic.com/korg_microkorg_s.htm
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  36. https://www.sweetwater.com/store/detail/microKORG2--korg-microkorg-2-37-key-virtual-analog-synthesizer-and-vocoder
  37. https://www.korg.com/us/products/synthesizers/microkorg2/specifications.php
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  50. https://www.sweetwater.com/store/detail/RK100FSRD--korg-rk-100s-37-key-keytar-red
  51. https://www.bhphotovideo.com/c/product/1675682-REG/korg_rk100s2rd_rk_100s_37_note_keytar_red.html
  52. https://cdn.korg.com/us/support/download/files/c0c8b6357456bf3d4d703e8fbb92cc3d.pdf
  53. https://www.korg.com/us/news/2022/1123/
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  57. https://www.korg.com/us/news/2025/1028/
  58. https://korg.shop/korg-collection-6.html
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