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Korg RADIAS R Rackmount Synthesizer / Vocoder Module

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The Korg RADIAS Synthesizer Vocoder brings together a sound module based on Korg's cutting-edge, analog-modeling MMT engine and a full complement of knobs and buttons. This 24-voice synth offers a var... Click To Read More About This Product

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The Korg RADIAS Synthesizer Vocoder brings together a sound module based on Korg's cutting-edge, analog-modeling MMT engine and a full complement of knobs and buttons. This 24-voice synth offers a variety of synthesis algorithms together with multiple effects, modulation sequencing, comb filter and wave shaping features, as well as formant-motion vocoding. The Korg RADIAS includes customizable synthesis templates to be used as starting points, with template data for 128 synth timbres, 128 insert effects, and 128 master effects.

The heart of this synthesizer vocoder beats with Korg's cutting-edge MMT (Multi Modeling Technology) synth engine, which borrows much of its modeling techniques from Korg's flagship OASYS. It eliminates aliasing noise in even the highest frequencies and delivers clean, pure waveforms. RADIAS provides two oscillators for each timbre that deliver modeled analog waveforms, formant waveforms, noise, ring modulation, sync, plus classic and modern PCM waveforms. The analog modeled waveforms allow a variety of oscillator modulation algorithms to be used to create complex sounds, even from a single oscillator. The dual-filter structure allows two filters to be used individually, side by side, or in series for maximum versatility.

Three envelope generators are used to apply time-varying changes to the pitch, filter cutoff, and amp level, as well as many other parameters. The bundled Korg RADIAS Sound Editor/Librarian software makes it easy to edit, manage, and archive settings on your computer through the USB port. RADIAS has two LFOs, variable Drive mode, a flexible wave shaping circuit, three modulation sequencers, six virtual analog synth patch cords, envelope follower, 16-band vocoder, 30 effect algorithms, six types of arpeggiator patterns, dual linkable 32-step sequencers, 256 programs, 32 drum kits, and 16 formant motion sets.


MMT (Multiple Modeling Technology) synth engine
24-voice polyphony
Oscillator 1: 9 basic waveforms, 4 types of modulation, PCM (64 sounds, 128 drums)
Oscillator 2: 4 basic waveforms, 2 types of modulation
Noise generator
Filter 1: -24 dB Low Pass, -12 dB Low Pass, High Pass, Band Pass, Thru modes
Filter 2: Low Pass, High Pass, Band Pass, Comb modes
Each filter has serial, parallel, and individual routings
1 driver or wave shaper (11 types)
3 EGs
2 LFOs
6 virtual patches
3 modulation sequences
16-band vocoder
Variable level/pan for each vocoder channel
Vocoder formant control functions
Envelope follower
30 effects
6 arpeggio types (Up/Down/Alt1/Alt2/Random/Trigger)
Dual 32-step sequencers
256 programs
32 drum kits
2 - 1/4" inputs
1/8" mic/line input
L/MONO, R 1/4" outputs
L/R 1/4" outputs
1/4" headphone jack
Assignable pedal jack
Assignable switch jack
USB connector
128 x 64 pixel full-graphic backlit LCD screen
RADIAS upright: 34.84"W x 8.78"H x 15.08"D
RADIAS folded: 34.84"W x 3.90"H x 15.08"D
19.18 lbs.
Includes headset condenser microphone; AC adapter; CD-ROM (PC editor software, etc.); 4 washers, 4 bushings, 4 screws (RADIAS-R only); accessory shelf
Windows system compatibility to connect via USB
Supported OS: Microsoft Windows XP Home Edition/Professional
Supported Computer: A computer with USB connector that meets the above requirements
Macintosh system requirements to connect via USB
Supported OS: Mac OS X 10.2 or later
Supported Computer: Apple Macintosh with USB port
Note: USB MIDI has been tested and works under Rosetta and Universal Binary on Intel-based Macs, using the standard Class Compliant driver. In this case, however, Port Names will be shown as generic names like Port 1, Port A etc. instead of the product name.
Windows Sys. Req. for RADIAS Editor
CPU: Intel Pentium/Celeron 500MHz or faster
Memory: 256MB or more, 512MB or more recommended
Monitor: 1024 x 768, 16-bit color or higher
Operating system: Microsoft Windows XP Home Edition/Professional Edition Service Pack 1 or later
Mac Sys. Req. for RADIAS Editor
CPU: Apple G4 400MHz or better
Memory: 256MB or more, 512MB or more recommended
Monitor: 1024 x 768, 32000 colors or higher
Operating system: Mac OS X v.10.2.8 or later
Note: This software has been tested on Intel-based Macs, and while not Universal Binary compliant, runs fine under Rosetta
PCM sound processed with INFINITY
Specifications subject to change without notice
Pro Coverage
USA Warranty Policy

All Korg products purchased from a Korg USA authorized dealer are warranted to be free from defects in material and workmanship to the original consumer purchaser as listed below:

Labor: 1 Year
Parts: 1 Year

Exceptions: Tubes, AC Adapters, Foot Switches: 90 days

Warranty Requirements and Limitations:

-Proof of Warranty - The customer must provide proof of purchase in order to obtain warranty service. The dated sales slip or copy thereof is the only acceptable proof of purchase.

-The product must be purchased from a Korg USA authorized dealer and have a valid serial number.

Damage resulting from the following causes are excluded from the warranty set forth above:
-Misuse, including damage occurring during shipment, damage caused by battery leakage, accident, fire, unauthorized repairs, tampering, cosmetic damage or other types of damage which are the result of improper handling or abuse.
-The cleaning of controls or contacts due to exposure to dirty, dusty, or otherwise contaminated environment.
-Damage resulting from modification.
-Damage to units used for loan or rental.

Register online and extend your warranty!
Register your new Korg keyboard, keyboard rack module or digital piano online and receive a certificate that extends the product warranty for an extra year from the date of purchase.

  • Customer Reviews

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by PowerReviews

(based on 2 reviews)

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Reviewed by 2 customers

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(3 of 5 customers found this review helpful)


Radias is very easy to program

By Nick

from Texas

The Korg Radias is an amazingly easy Analog Modeled Synthesizer to program especially if you understand synthesizer basics. The design of the software is excellent in just how easy it is to navigate to any of the many features this synth has. I have several synths and this is by far the easiest synth to learn, master, and program. It has many great features like Vocoder, Modulators, Arpeggiator, with great sounding Oscillators and Filters. One complaint is the PCM waves in this synth are weak and too few but most like me will probably be using this synth for the standard analog type waves it produces such as saw, square, triangle, and sine. The Unison feature yeilds incredibly fat analog sounds. It only has 24 note Polyphony but that's still very high for an analog modeling synth and if you need more just buy another Radias and stack them. I plan on buying 2 more cuz I really like this synth.

(3 of 3 customers found this review helpful)


First Time Vocoder User

By K.J.Williams

from Portland , OR

This is probably the greatest investment I have ever made. KORG is the only brand that has made synthesizer/vocoder like this. This is my first vocoder that I have owned. It will complement my old Yamaha DX7-IIFD, which works well with the Radias. As for Vocoder - I found it to be a tool to teach myself how to sing. You can not cheat the vocoder by trying to sing higher or lower than the key note that you are telling the Radias to output your voice as - it will not change. But you can cheat singing practice ( not training tone control ) via the vocoder. I wouldnt recommend it for truely devoted singers who are in training. However, the Radias in all , makes an excellent upgrade and addition to my music. I would recommend this KORG device to any keyboardist of my style.

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