The Korg microX is a compact yet powerful synthesizer that offers professional-grade sound in a portable package. Released in 2007 alongside its larger sibling, the X50, the microX stands out with its diminutive form factor and distinctive packaging—each unit comes in a durable, bright orange road case rather than a standard cardboard box, making it ideal for touring musicians and performers.
At just two feet in length (606 x 226 x 80mm) and weighing only 2.5kg, the microX is designed for portability without compromising on sound quality. Originally available in black, Korg later released a limited edition white model. Despite its small size, the microX delivers the legendary "Korg sound" through the same HI (Hyper Integrated) synthesis engine found in the company's premium Triton workstation line, making it the most affordable entry point into Korg's professional sound engine technology.
Sound Engine and Quality
The microX features a 64MB PCM Wave ROM, with 32MB containing the classic Triton waveset and the remaining 32MB dedicated to new multi-sampled sounds and drum samples—many unique to this model. This comprehensive sound library includes 642 multisamples and 929 drum samples of exceptional quality.
The sound quality is impressive, with particularly excellent pianos, exceptional organs, sublime strings, and even convincing acoustic guitars. The digital and analog-style keyboard pads are both fresh and inspirational, with many developed specifically for this keyboard. Despite its compact size, the microX produces a surprisingly big, mature sound that rivals much larger synthesizers.
Sound Organization and Capabilities
The microX offers an extensive collection of sounds organized into:
- 640 single patches (Programs)
- 384 Combinations (layered, split, or velocity-switched arrangements of up to eight Programs)
- 40 user-programmable drum kits
- Complete GM sound set
With 62-64 voice polyphony (depending on the complexity of the sounds), the microX has enough power to handle even the most elaborate layered combinations. Every musical style is covered in the preset library, from conventional instruments to contemporary electronic sounds.
Synthesis Architecture and Programming
The microX is built on a two-oscillator, virtual-analog synthesis structure with extensive modulation options for precise sound shaping. Every parameter is fully programmable by the user, either through the onboard controls or via the included editor/librarian software.
The large backlit display (with a distinctive bright red screen) and array of front panel knobs make programming relatively straightforward, given the depth of options available. Four controller knobs with three switchable functions provide access to 12 parameters for real-time tweaking, covering filter/envelope settings, arpeggiator controls, and user-programmable functions.
Effects and Arpeggiators
The effects section is particularly powerful, allowing up to four effects to be used simultaneously:
- One insert effect
- Two master effects
- One master three-band EQ
- 89 different effects algorithms in total
The dual polyphonic arpeggiators are a standout feature, with 256 pattern locations (5 preset, 251 user-programmable). These patterns range from basic scales to drum patterns, guitar riffs, bass lines, and piano flourishes, many responding dynamically to playing style.
Controller Functions
Beyond its capabilities as a synthesizer, the microX functions as a MIDI controller for software instruments and DAWs. The four knobs can be switched to control 12 soft synth parameters or DAW functions, with 64 programmable control setups. Preset templates are included for popular software like Reason, GarageBand, Cubase, and Korg's Legacy collection.
Design and Build
The microX features a 25-note velocity-sensitive keyboard with a light, springy action. While not built like a tank, it's robust enough for its intended purpose. Some components like knobs and end-cheeks are somewhat lightweight and plastic, but others, like the joystick-style combined modulation and pitch-bend control, feel reassuringly solid.
The control panel includes a joystick-style "Click Point" navigation system, octave up/down buttons with LED indicators, and a clear, informative display. The headphone port is conveniently located on the front panel to prevent cables from trailing over the keyboard, though it uses a mini-jack sized connection rather than a standard one.
Connectivity
The microX offers comprehensive connectivity options:
- Main stereo outputs
- Two individual outputs
- Headphone output (mini-jack)
- MIDI In and Out
- USB port for direct computer connection
- Three pedal inputs: assignable continuous controller, on/off footswitch, and damper pedal
Software Integration
The bundled editor/librarian software runs both as a standalone application and as a plug-in (VST, RTAS, or Audio Units) within most popular DAWs. This software provides complete control over every aspect of the synth through a series of tabbed screens, making deep editing much more intuitive than using the hardware interface alone.
Summary
The Korg microX may be physically small, but it's a highly capable, versatile synthesizer that delivers the professional "Korg sound" in an exceptionally portable package. While its limited two-octave keyboard may not suit all players, its comprehensive sound library, powerful synthesis engine, and additional controller functions make it an excellent option for studio producers, touring performers, and anyone seeking high-quality sounds in a compact format.
Technical Specifications
Physical Specifications
- Dimensions: Approximately 2 feet (60 cm) in length
- Weight: 2.5 kg (5.5 lbs)
- Keyboard: 25 keys, velocity-sensitive (no aftertouch)
- Display: Large backlit LCD (bright red)
- Colors: Black (standard), White (limited edition)
- Case: Included durable, bright orange molded-plastic carrying case
Sound Engine
- Synthesis Type: HI (Hyper Integrated) sample and synthesis system
- Wave ROM: 64MB PCM samples
- 32MB original Triton wavesets
- 32MB new multi-samples and drum samples
- Multisamples: 642 total
- Drum Samples: 929 total
- Maximum Polyphony: 64 notes (may be reduced with complex sounds)
Sound Library
- Programs (Single Patches): 640 preset
- Combinations: 384 preset (up to 8 Programs per combination)
- Drum Kits: 40
- GM Sound Set: Full General MIDI sound set included
Architecture
- Basic Structure: Two oscillator, virtual-analogue synthesis
- Modes: Program, Combination, Multi (16-channel multitimbral)
Controllers
- Main Controllers:
- Combined modulation and pitch-bend joystick
- 4 controller knobs with 3 banks of functions (12 parameters total)
- Navigation "Click Point" (joystick-style)
- Octave up/down buttons with LED indicators
- Pedal Inputs:
- Assignable continuous controller
- Assignable on/off footswitch
- Dedicated damper pedal input
Arpeggiators
- Number: 2 independent polyphonic arpeggiators
- Memory Locations: 256 total
- 5 preset patterns
- 251 user-programmable patterns
Effects
- Simultaneous Effects: Up to 4 per sound/combination
- 1 insert effect
- 2 master effects
- 1 master three-band EQ
- Effect Types: 89 different algorithms
Controller Functions
- MIDI Controller Memory: 64 different programmable setups
- Included Templates: Preset templates for Reason, GarageBand, Cubase, and Korg Legacy Collection
Connectivity
- Audio Outputs:
- Main stereo output (L/MONO, R)
- 2 individual outputs
- Headphone output (mini-jack, front-mounted)
- MIDI:
- USB: Type B port for direct computer connection
- Pedal Inputs: 3 (continuous, footswitch, damper)
Software
- Editor/Librarian: Included
- Standalone version
- Plug-in version (VST, RTAS, Audio Units)
- System Requirements:
- Windows XP or above
- Mac OS 10.3 or above
- Not compatible with Intel Macs (as noted in original review)
Additional Features
- Microtuning: Programmable custom microtuned scales
- Audition Function: Triggers appropriate musical phrase for sound preview
- MIDI: 16-part multitimbral operation in Multi mode
