Nautilus AT Gray
Nautilus AT Gray is a limited edition workstation merging Korg's renowned sound with a sleek matte gray finish. Available in both 61 and 88-key versions, it features aftertouch, nine powerful sound engines, dynamic real-time controls, and an intuitive user interface. Elevate your music production with this stylish and versatile instrument, perfect for both stage and studio settings.
Full warranty managed directly by Korg in the UK & Ireland. Find out more.
Free 30-day returns available on all products. Find out more.
Where sound meets style
Introducing the limited edition Nautilus AT Gray, a stunning addition to the Nautilus family. This aftertouch-equipped workstation comes in an elegant matte gray finish, offering both 61 and 88-key versions while maintaining the same powerful features that make Nautilus a top choice for musicians.
The 61-key model boasts a sleek gray bottom panel, and the 88-key model is enhanced with sophisticated black wooden side panels, ensuring a refined aesthetic appeal. Perfect for both stage performances and studio sessions, this limited edition not only empowers your music creation but also adds an artistic touch to your setup. Enjoy the renowned Korg sound with an amplified visual appeal.
Unleash Your Creativity
Nine Powerful Sound Engines
The Nautilus AT Gray continues to push the boundaries of what a performance synth and workstation can achieve. With the power of nine dedicated sound engines, you can explore a vast sonic landscape, from realistic pianos and electric pianos to classic tonewheel organs and beyond. Each engine is meticulously crafted to deliver unparalleled expressive power.
SGX-2
A piano engine offering delicate expressiveness with 12-step velocity-switched sound and string resonance - it features the most piano libraries ever in a single product.
EP-1
Realistically reproduces seven famous electric piano sounds.
CX-3
Generates the distinct sound of classic tonewheel organs.
HD-1
A high-definition PCM engine, it delivers a vast array of instrument sounds with high-quality sampling.
MS-20EX
Powerful analogue modelling engine based on the legendary MS-20.
PolysixEX
Rich polyphonic analogue sounds based on the Polysix.
AL-1
Advanced analogue modelling for dynamic sound creation.
MOD-7
Incredibly powerful FM/VPM engine incorporating subtractive synthesis and wave shaping.
MOD-7
Highly realistic plucked string modelling engine.
Built to perform
Set list
Organise all resources for live performances with 16 touch-screen buttons, each capable of instantly calling up the appropriate Preset, Combination, or Sequence. Customise button colours for quick visual cues during performances. The mode also includes a nine-band graphic EQ to adjust the overall tone to match the venue.
Open sampling system
Sample external audio sources quickly in any mode (Program, Combination, or Sequencer). Load AIFF, WAV, SoundFont 2.0, and AKAI S1000/3000 format samples, and use USB Ethernet adapters for fast data exchange with your computer.
MIDI & audio sequencing
Capture ideas and create polished tracks with a sequencer offering 16 MIDI tracks and 16 audio tracks. The 16-track audio recorder can simultaneously capture up to four tracks of 16-bit/24-bit uncompressed data at a 48 kHz sampling rate.
Powerful effects
Add impact with 12 Insert effects, 2 Master effects, and 2 Total effects. Each timbre, sequencer track, and audio track has a separate three-band EQ for subtle tonal adjustments.
Extended control
Connect class-compliant USB-MIDI controllers directly to the Nautilus for extended control options
Smooth Sound Transition
Switch between sounds without dropouts and glitching, ensuring seamless performance transitions.
More information
Specifications
System, Keyboard
SystemNAUTILUS System Version 1.0
Keyboard
88 key: RH3 (Real Weighted Hammer Action 3), A - C
61 key: Natural Touch Semi Weighted, C - C
*Supports Velocity sensitive and aftertouch.
Tone Generator
Synthesis Types:
SGX-2: Premium Piano (Acoustic Piano)
EP-1: MDS Electric Piano (Electric Piano)
HD-1: High Definition Synthesizer (PCM)
AL-1: Analog Synthesizer (Analog Modeling)
CX-3: Tonewheel Organ (Tonewheel Organ Modeling)
STR-1: Plucked String (Physical Modeling)
MOD-7: Waveshaping VPM Synthesizer (VPM Synthesis)
MS-20EX: Component Modeling Technology (Analog Modeling)
PolysixEX: Component Modeling Technology (CMT Analog Modeling)
Maximum Polyphony *1 *2
SGX-2: 100 voices*
EP-1: 104 voices
HD-1: 140 voices
AL-1: 80 voices
CX-3: 200 voices
STR-1: 40 voices
MOD-7: 52 voices
MS-20EX: 40 voices
PolysixEX: 180 voices
1: In rare cases, when a large number of processor-intensive effects are active simultaneously (for instance, more than 14 O-Verbs), polyphony may be slightly reduced.
2: A portion of the multicore processor in NAUTILUS is devoted to generating voices, and a separate portion is devoted to generating effects. NAUTILUS dynamically allocates the voice processing power between the engines as necessary. The quoted maximum numbers of voices apply when 100% of the voice processing power is devoted to a single engine.
3: 100 dual-stereo notes (equivalent to 400 mono voices)
Preset PCM
RAM: 496 MB / DISK: 2.3G (ROM 1,771 Multisamples, 3,955 Drumsamples)
Build-in Expansion PCM Libraries
EXs301: German2 D Piano
EXs302: Italian F Piano
EXs303: Japanese Upright U Piano
EXs304: Prepared Piano
EXs305: Historical Keyboards
EXs306: Vintage Keyboards 2
EXs307: Strings & Synths
EXs308: Guitar Collection
EXs309: Bass Collection
EXs310: World Essence
EXs311: Background Loops
EXs312: SFX & Hits
EXs313: Found Percussions
EXs314: Expansion Drums
PCM RAM Capacity
Approx. 2GB *4
*4: The memory available for Sampling Mode will change based on the use of Expansion PCM libraries and User Sample Banks. Approx. 260 MB is available when shipped from the factory (When loading the file named “PRELOAD.KSC”).
Wave Sequences
598 User memory, 377 Preload
Support for stereo multisamples, synchronisation of individual notes, and tempo-based settings.
SGX-2 Program
Premium Piano
Full key stereo sampling, Chromatically sampled at up to 12 velocity levels, no looping.
Damper resonance and mechanical noise are reproduced.
Una Corda sample support.
PCM
EXs301 – German2 D Piano
12 velocity levels, includes Ambience Piano type/samples
EXs302 – Italian F Piano
12 velocity levels, no Una Corda samples
EXs303 – Japanese Upright U Piano
8 velocity levels
EXs304 – Prepared Piano
1-4 velocity levels
Piano Type
128
(With the factory settings, the 64 varieties of EXs6: German D Piano, EXs7: Japanese C Piano, EXs12: SGX-1 Austrian D Piano, EXs17: Berlin D Piano do not produce sound. The options must be downloaded. (Those will be released at a later date.)
Oscillator Control
Damper Resonance
Damper Noise
Mechanical Noise
Note Release
String Resonance
Una Corda
EP-1 Program
MDS Electric Piano
Tine and reed-type electric pianos powered by Multi-Dimensional Synthesis (MDS), and vintage effects.
Electric Piano Model Types
7: Tine EP I Early, Tine EP I Late, Tine EP II, Tine EP V, Tine EP DMP, Reed EP200, Reed EP200A
Oscillator Control
Harmonic Sound Level, Attack Noise, Level, Release Noise Level, Attack Brightness, Hammer Width
Panel Control
Tine Type: Preamp Volume, Tone (Treble, Bass), Vibrate (On/Off, Intensity, Speed), Amp/Cabinet (On/Off, Drive)
Reed Type: Preamp Volume, Tone (Treble, Bass), Vibrate (Intensity, Speed), Amp/Cabinet (On/Off, Drive)
Effect Types
9: Small Phase, Orange Phase, Black Phase, Vintage Chorus, Black Chorus, EP Chorus, Vintage Flanger, Red Comp, VOX Wah
HD-1 Program
Advanced Vector Synthesis
Control oscillator volumes and synthesis & effects parameters via the Vector Joystick and the tempo-synchronized Vector Envelope.
Structure
Single: Only OSC1, Double: OSC1 and OSC2.
Double mode: Lets you layer two completely separate synth voices, each with their own velocity-switched oscillator, dual filter, EGs, LFOs, etc.
Drums: One drum kit, Double Drums: Two drum kits.
Oscillators
8 velocity zones per oscillator, with switching, crossfades and layering.
Each zone can play mono or stereo Multisamples or Wave Sequences.
Filters
Two multi-mode filters per voice (low-pass, high-pass, band-pass and band-reject), Four-mode filter routings (single, serial, parallel and 24dB mode)
Driver
Per voice non-linear driver and low boost circuit
EQ
Three bands, with sweep-able mid
Modulation
Three envelope generators, two LFOs per voice, common LFO, four key tracking generators, AMS (Alternate Modulation Source), two AMS mixers
Quick Layer / Split function
EXi Program Common
Advanced Vector Synthesis
Control oscillator volumes and synthesis & effects parameters via the Vector Joystick and the tempo-synchronized Vector Envelope.
Modulation
Common Step Sequencer, AMS (Alternate Modulation Source), Common LFO, 2 Key Tracking Generators
EQ
Three bands, with sweep-able mid
Quick Layer / Split function
AL-1 Program
Oscillators
Ultra-low-aliasing oscillators, OSC1, OSC2, Sub-oscillator and noise generator; ring modulation, FM and Sync
Audio Input
External audio can be processed through the ring modulator, filter, driver, amp, and EQ
Filters
Two multi-mode filters (low-pass, high-pass, band-pass and band-reject) with four types of filter routings (single, serial, parallel and 24dB mode), Multi Filter mode (only Filter-A; modulatable mix of Low Pass, High Pass, Band Pass, and dry input, for creating a wide variety of unique filter types and effects)
Driver
Per-voice non-linear driver and low boost circuit
Modulation
Five Envelope generators, four per-voice LFOs, two AMS Mixers; Per-voice Step Sequencer
CX-3 Program
Tonewheel Organ Modeling
Phase-synchronous tonewheels (clean and vintage modes), percussion, key click, wheel brake
EX Mode
Four additional, user-specified drawbars, and expanded percussion
Internal Effects
Rotary speaker, vibrato/chorus, amp modeling with overdrive, 3-band EQ
Drawbar Control
Controlled via nine front-panel sliders (via Tone Adjust)
Split
Upper, Lower (even in EX mode)
Modulation
Two AMS mixers
STR-1 Program
Physically Modeled String
Includes physically modeled damping, decay, dispersion, nonlinearity, harmonics, dual pickups, and more. Most string parameters can be controlled in realtime.
String Excitation
Three independent excitation sources can be used simultaneously: Pluck, Noise, and PCM.
16 preset “pluck” types, with modulatable width and randomization.
Noise generator with saturation and dedicated low pass filter.
PCM Oscillator
KORG’s ultra-low-aliasing technology, as introduced in the HD-1; 4 velocity zones per oscillator.
Uses any mono Multisamples, including ROM, EXs, User Sample Bank, or Sampling Mode. Supports Virtual Memory.
Excitation Filter
Dedicated 2-pole multimode filter for shaping the string excitation. Filter can be enabled/disabled separately for each excitation source.
Low Pass, High Pass, Band Pass, and Band Reject modes.
Audio Input and Feedback
Run real-time audio through the string, including feedback through effects.
Modeled feedback includes modulate-able instrument-to-amp distance and orientation.
Filters
Dual multi-mode filters per voice; Single, Serial, Parallel (with split stereo output), and 24dB (4-pole) configurations.
Low Pass, High Pass, Band Pass, and Band Reject modes.
Multi Filter Mode (Filter A only):
Modulatable mix of Low Pass, High Pass, Band Pass, and dry input, for creating a wide variety of unique filter types and effects.
Modulation
5 Envelopes, 4 per-voice LFOs, 2 Key Track generators, String Tracking generators, 4 AMS Mixers
MOD-7 Program
Waveshaping VPM Synthesizer
Combines Variable Phase Modulation (VPM), Waveshaping ring modulation, PCM sample playback, and subtractive synthesis; Able to convert-load SYX files.
Oscillators
6 VPM/Waveshaper/Ring Modulation Oscillators: Phase and modulatable pitch per oscillator.
101 Waveshaper tables plus modulatable Drive and Offset.
Use as oscillators, or as Waveshapers or Ring Modulators for other signals.
PCM Oscillator
KORG’s ultra-low-aliasing technology, as introduced in the HD-1. 4 velocity zones per oscillator.
Uses any mono Multisamples, including ROM, EXs, User Sample Bank, or Sampling Mode.
Supports Virtual Memory.
Noise Generator
(With saturation and low-pass filter function)
Audio Input
Run real-time audio through the VPM Oscillators and filters.
Filters
Dual multi-mode filters per voice (Low Pass, High Pass, Band Pass, and Band Reject modes).
Two types of filter looping (Parallel and 24 dB “4-Pole”).
Multi Filter Mode (Filter A only):
Modulatable mix of Low Pass, High Pass, Band Pass, and dry input, for creating a wide variety of unique filter types and effects.
Patch Panel
Supports both preset algorithm (78 types) selection and free patching.
Three 2-in, 1-out mixers for scaling and merging audio, fully modulatable, with phase inversion.
Main 6-input stereo mixer, with modulatable pan and volume, plus phase inversion.
Modulation
10 Envelopes, 4 per-voice LFOs, 9 Key Tracking generators, Per-voice Step Sequencer, 4 standard AMS Mixers plus 4 simple AMS Mixers.
MS-20EX Program
Oscillators
Ultra-low-aliasing oscillators; VCO1, VCO2, Ring Mod, Pink and White Noise Generator.
Audio Input
Run real-time audio through the synthesis engine and ESP (External Signal Processor).
Filters
12dB/octave High Pass and Low Pass self-resonant filters.
ESP section: 24dB/octave Low Cut and High Cut filters, available per voice.
Patch Panel
Patchable audio and modulation, at audio rates.
Patch Points
Keyboard: Keyboard CV Out, Keyboard Trigger Out, VCO1+VCO2 CV In, VCO2 CV In.
VCO: VCO1+VCO2 External Frequency Control In, VCO1 Out, VCO2 Out.
VCF: External Signal In, External HP Filter Cutoff Frequency Control In, External LP Filter Cutoff Frequency Control In, HPF Out, LPF In, LPF Out.
VCO+VCF: Total External Modulation In.
VCA: External Initial Gain Control In, VCA In.
EG: EG1 Envelope Signal Normal Out, EG1 Envelope Signal Reverse Out, EG1+EG2 Trigger In, EG1 Trigger In, EG2 Envelope Signal Reverse Out.
MG: Triangle Out, Rectangle Out.
Noise Generator: Pink Noise Out, White Noise Out.
Sample and Hold: Clock Trigger In, Sample Signal In, S/H Out.
Modulation VCA: Control Voltage In, Signal In, Signal Out.
Manual Controller: Control Wheel Out, Momentary Switch.
ESP: Signal In, AMP Out, BPF In, BPF Out, F-V CV Out, Envelope Out, Trigger Out.
Others: EXi Audio In, Mixer 1 In, Mixer 1 Out, Mixer 2 In, Mixer 2 Out.
ESP (External Signal Processor)
Use incoming audio as a trigger and/or CV source.
Modulation
Original DAR (Delay, Attack, Release) and HADSR (Hold, Attack, Decay, Sustain, Release) EGs 1 & 2.
Original MG (with MIDI sync), Sample-and-Hold, MVCA.
NAUTILUS: 4 additional multi-stage Envelopes, 4 additional per-voice LFOs, and 4 AMS Mixers.
PolysixEX Program
Oscillators
VCO, Saw, Pulse, PWM.
Sub Oscillator: Off, 1 octave below, 2 octaves below.
Filter
24dB (4-Pole) Octave Low Pass self-resonant filter.
Effects
Integrated Polysix Chorus, Phaser, and Ensemble.
Arpeggiator
Integrated MIDI-synced arpeggiator, with adjustable Range, Mode, and Latch.
Modulation
Polysix: Original ADSR EG and MG (with MIDI sync).
NAUTILUS: 2 additional multi-stage Envelopes, 2 additional per-voice LFOs, and 4 AMS Mixers.
Combination
Number of Timbres, Master Keyboard Functionality
16 Maximum Keyboard and velocity splits, layers, and crossfades of up to 16 Programs and/or external MIDI Devices.
The tone adjust parameter function lets you modify program settings, and the master keyboard function lets you control external MIDI devices.
Advanced Vector Synthesis
Control oscillator volumes and synthesis & effects parameters via the Vector Joystick and the tempo-synchronized Vector Envelope.
Quick Layer / Split function.
Drumkit
Assignable stereo/mono samples
8 velocity zones per oscillator (with crossfade functions).
Number of Programs/Combinations/Drum kits
User Memory Programs
2,560 (1,920 [1,280 HD-1+640 EXi] come preloaded)
User Memory Combinations
1,792 (256 come preloaded)
User Memory Drum Kits
264 (104 come preloaded)
256 GM Level2 preset programs + 9 GM Level 2 drum preset programs.
Set List
Number of Set Lists/Slots
128 set lists, 128 slots per set list.
Each set list provides a 9-band graphic EQ, and a Tone Adjust function that allows program settings to be adjusted.
Transpose setting.
Hold Time setting of Smooth Sound Transition (SST) supported for each slot.
Sampling
System
Open Sampling System (resampling, In-Track sampling).
Bit Depth/Sampling Frequency
RAM: 16-bit/48 kHz stereo/mono sampling
DISK: 16 or 24-bit/48 kHz.
Sampling Time
RAM: Depends on the amount of available PCM RAM.
DISK: Maximum 80 minutes stereo (879MB: 16bit).
Sample Locations
16,000 samples/4,000 multisamples (128 indexes per multisample).
Formats
KORG format, AKAI S1000/S3000 data (with advanced Program parameter conversion); SoundFont 2.0, AIFF, and WAVE formats.
Editing
Time Stretch, Time Slice, Crossfade Loop, and other standard editing features.
Effects
Insert Effects
12 Stereo in / stereo out.
Master Effects
2 Stereo in / stereo out.
Total Effects
2 Stereo in / stereo out.
Timbre EQ
One 3-band EQ for each timbre/track.
Effect Types
197
Modulation
Dynamic Modulation and Common LFO.
Effects Control Busses
Stereo side-chaining for compressors, gates, vocoders, etc.
Effect Presets
Total 783 preset, Maximum 32 per 1 effect (Preset User).
Arpeggiator
Arpeggiator Modules
One module in Program mode, two modules in Combination and Sequencer modes.
Arpeggio Pattern
5 presets + ARP A 2,048 slots (1,593 come Preload) + ARP B 128 slots.
Controllers
On/Off, Latch, Gate, Velocity, Length, Swing, Tempo.
Drum Track
Preset Patterns
1,272 (common with the preset patterns of the MIDI sequencer).
User Patterns
1,000. Patterns created in Sequencer mode can be converted to drum track user patterns. Trigger Mode, Sync, Zone, Swing, Drum SD, Tempo settings can be specified.
Sequencer / HDR
Tracks
16-track MIDI sequencer + 16-track hard disk recorder + 1 master track.
Number of Songs
200
Resolution
1/480
Tempo
40.00 – 300.00 (1/100 BPM resolution)
Maximum Memory
400,000 MIDI events or 300,000 audio events.
MIDI Tracks
16 tracks plus the master track, 697 preset / 100 user patterns (per song), 18 preset/16 user template songs.
Audio Tracks
16-track playback, 4-track simultaneous recording, WAV file format 16bit/24bit. Maximum Single-file Recording Time (mono): 80 minutes. Automation: Volume, Pan, EQ, and Send1/2. 10,000 regions (max.). Event Anchors, BPM Adjust.
Other Functions
RPPR (Realtime Pattern Play and Record): 1 Pattern set per song.
General
Disk Mode
Load, save, utility, data filer function (save/load MIDI System Exclusive data), CD-R/RW (UDF format read/write), ISO9660 Level 1.
Controllers
Joystick, Switches 1 & 2. Arpeggiator Control: On/Off, Latch, Gate, Velocity, Length, Swing, Tempo. DRUM TRACK: On/Off, Swing, Drum SD, Tempo.
Display
TouchView graphical user interface, 7 inch color TFT, WVGA (800 x 480 dots), adjustable brightness.
Principal Specifications
Frequency Response: 20Hz-22kHz, +/-1.0dB, 10k Ω load.
THD+N: 20Hz-22kHz, 0.01%, 10k Ω load (typical).
S/N: 95dB (typical).
Dynamic Range: 95dB (typical).
Crosstalk: 95dB, at 1kHz (typical).
Outputs
L/MONO, R, Individual 1-4
1/4” TRS Balanced. Output Impedance: 350 Ω Stereo; 175 Ω Mono (L/MONO Only), Nominal Level: +4.0 dBu, Maximum Level: +16.0 dBu (when load impedance is 600 Ω or greater). MAIN VOLUME slider controls only AUDIO OUTPUT (MAIN) L/MONO and R.
Headphones
1/4” stereo phone jack. Output impedance: 33 Ω, Maximum Level: 60+60 mW (when load impedance is 33 Ω), MAIN VOLUME knob (link with AUDIO OUTPUT (MAIN)).
USB-B
24-bit, Sample Rate: 48 kHz, 2 channels. Digital output of the same signals as AUDIO OUTPUT (MAIN) L/MONO and R.
Inputs
Audio Inputs 1 and 2
1/4” TRS Balanced. Input Impedance: 10 kΩ, Nominal Level: LINE +4 dBu, Maximum Level: LINE +16 dBu, Nominal Level: MIC –22 dBu, Maximum Level: MIC -10 dBu, Source Impedance: 600 Ω.
USB-B
24-bit, Sample Rate: 48 kHz, 2 channels.
Control Inputs
Damper pedal (half damper supported), Assignable switch, Assignable pedal.
MIDI
In, Out, Thru.
USB
USB A (TYPE A)
For connection to external USB devices (QWERTY keyboards, MIDI controllers, ethernet adaptors, and storage).
USB B (TYPE B)
MIDI/audio interface, MIDI: 1 (16 channel) input / 1 (16 channel) output, Audio: 2 channel input / 2 channel output. 2 USB high-speed ports (supports 480Mbps).
Disk Drives
60 GB SSD (2.5”).
Power Supply
AC power supply terminal, Power switch.
Dimensions
88 key: 1,437 x 387 x 139 mm / 56.57” x 15.24” x 5.47”.
61 key: 1,062 x 386 x 116 mm / 41.81” x 15.20” x 4.57”.
Weight
88 key: 23.1 kg / 50.93 lbs.
61 key: 13.0 kg / 28.66 lbs.
Power Consumption
40 W.
Accessories
AC cord, Quick Start Guide.
Option
XVP-20: Expression/Volume Pedal
EXP-2: Foot Controller
DS-1H: Damper Pedal
PS-1: Pedal Switch
PS-3: Pedal Switch
Returns
We offer a 30-day returns period on all products purchased directly from Korg UK.
Specifications and appearance are subject to change without notice.
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