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Choose the Musical Partner Destined to Deliver that Perfect Performance
From the legendary Donca-matic to the world’s most popular workstations, KORG has spent decades innovating new technologies designed to propel every keyboard performance to the highest level of excellence. KORG’s flagship Pa4X Professional Arranger continues this tradition with incredible refinements to every aspect of the sound quality—and with enhanced performance capabilities. The Pa4X Professional Arranger is more than a keyboard. It’s your backup band; your accompanist; and your musical director. It’s your soundman; your effects engineer; and your always in-tune background singers.
Best of all—you’re always in charge!
Ideal for composing, recording, and combo use, the intuitive Pa4X really comes to life in the hands of the solo keyboard performer and entertainer. And nowhere else is the flawless operation and superior sound of one keyboard instrument more in the spotlight. To that end, every aspect of KORG’s industry-leading Professional Arranger series has been re-examined and improved, resulting in the Pa4X—an instrument without equal. The all-new EDS-X (Enhanced Definition Synthesis – Expanded) sound engine delivers unprecedented realism and highly detailed sounds, drawing on a massive PCM resource over 10 times larger than those found in previous models. KORG’s exclusive DNC (Defined Nuance Control) provides highly-articulate solo instruments. Partnerships with Waves Audio and TC Helicon provide state-of-the-art audio processing and vocal effects. Plus, there are tons of new instruments and drumkits, along with a massive infusion of Styles to cover a world of musical genres.
From the original SAS-20; through the i, iS, and iX Series; to the highly acclaimed Pa Series; KORG’s arranger keyboards have been used by hundreds of thousands of music professionals across the planet. The Pa4X honors this rich history with powerful new technology and progressive input and ideas from leading performance musicians from around the world. The result is a combination of unbeatable sound quality, intuitive control, and innovative features—all housed in a modern, strong, and stylish aluminum case.

Three assignable switches, the four-way joystick—even a ribbon strip—allow KORG’s unique DNC (Defined Nuance Control) to reproduce the subtle nuances and articulations of acoustic instruments creating ultra-realistic performances rich in expression—all in real time and on demand. Bring any solo or melody to life with the growl of a passionately-played saxophone; the changing embouchure of a trumpet; the breath elements found in a clarinet or harmonica; and the added characteristics that give extra authenticity to the pizzicato and arco sounds of a string section. More than 90* authentic drumkits—including Ambient Drums—breathe life into any rhythmic passage; the Drum Family Easy Editing feature offers total control over volume, pitch, EQ, and more. An additional 400 MB* of user memory allows new sounds to be added quickly and easily using KORG, WAV, AIFF, and SoundFont™ formats. Conduct your own sampling session and take advantage of the complete sample recording and editing features found in the Pa4X.

The entire screen can be tilted forward and back to provide the perfect angle for optimum viewing—on stage or off! Searching for that song, Style, or file that you were just using? The multi-function Search feature can find what you are looking for—quickly! Styles and Keyboard Sets can be read directly from a USB drive—without the need to load data in the internal memory.
For those seeking an all-in-one solution, experience the optional PaAS Speaker System. This easy-to-use add-on provides spectacular sound for home and rehearsal use—or as a personal performance monitor. The bi-amped PaAS sound system contains five loudspeakers in a sleek cabinet that attaches directly to your Pa4X. Best of all, installation takes only seconds; no tools are required; no cables are needed, and no power supply is necessary.

The latest Styles – today!
Thanks to an all new built in SMF (Standard MIDI File to Style converter), you can quickly and easily have on board styles of the latest songs! Just obtain a new Standard MIDI File, load it into the Pa4X and the inbuilt converter will easily and quickly turn it into a full KORG style which you can save and recall any time you need it. Every function band musician will love the combination of latest styles and incredible KORG sound!




In addition to the Main Left and Right outputs, the Pa4X includes two additional assignable outputs. This can be ideal for isolating a part for additional signal processing or feeding an external mixer. A headphone output is conveniently located on the front panel. The microphone input uses an XLR connector, and phantom power is available. For inputs, the Pa4X provides a pair of balanced 1/4" inputs (Line 1) and a stereo 1/8" jack (Line 2) for use with smartphones, mobile devices, etc. MIDI In, Out, and Thru connectors are provided, as well as a USB to computer (Device) port. The composite RCA video output delivers the score and lyric display (or simply mirrors the internal display) to an external monitor.
More KORG Pa4X 61-Key Arranger Features At A Glance:
- Semi–weighted keys with velocity sensitivity and aftertouch.
- Elegant, streamlined aluminum cabinet
- Huge 7-inch capacitive TouchView™ display with tilting system.
- Easy-to-use panel layout and intuitive redesigned graphical interface.
- New EDS-X (Enhanced Definition Synthesis-eXpanded) sound engine for improved realism and pristine sound quality.
- Massive internal ROM with a renewed PCM database, plus up to 400 MB of user PCM data
- Over 1,500 sounds including GM and XG sets
- 512 user Sound and 128 user Drumkit locations with full editing features
- Digital Drawbar Organ sound engine
- DNC (Defined Nuance Control) and realtime articulation:
- Three assignable switches
- Four-way joystick
- Ribbon controller - Complete sample recording and editing features
- Import audio waveforms in the most common formats including Wav, Aiff and SoundFont™
- Over 500 factory Styles with Intros, Endings, Fills, Count-ins, and Breaks
- 4 Keyboard Sets and 4 Pads per Style,
- 13 Internal user banks and 13 Direct user banks locations for unlimited storage - Guitar Mode 2 provides more realistic guitar parts
- Chord Sequencer function in Style Play mode records any chord progression on-the-fly
- Chord Sequences can be saved in each Style and SongBook entry - Search function for quickly locating any musical resource
- New standard MidiFile to Style converter feature
- Keyboard Set Library includes a collection of best ready to play sounds
- Keyboard Sets can be recalled even from Direct locations - Multiple Effects processors – 142 effect types:
- 4 Insert and 3 Master effects for accompaniment parts,
- 1 Insert and 2 Master effects for Keyboard Tracks - Waves MAXXAUDIO Mastering Suite: MaxxEQ™, MaxxBass™, MaxxTreble™, MaxxStereo™, MaxxVolume™
- TC Helicon® Vocal Processing: Four-part Harmonizer, Double, µMod, Reverb, Delay, Filter, HardTune, Pitch Correction plus Compressor, EQ, Gate (Adaptive Mic Setting on the Mic input)
- Double MP3/MIDI file players with recording capability, X-Fader and Vocal Remover
- Score, Chords, and Lyric display
- Compatible with most common lyrics formats including graphical (+G) for MP3.
- Lyrics can be showed in their original languages (except Oriental and Arabic Languages - Enhanced compatibility for GM and XG songs.
- Fully programmable SongBook database based on Styles, SMF, Karaoke, and MP3
- Instant recall of any song setting
- User-definable Set Lists assignable to panel buttons
- Filtering and ordering options - Multi-language extended character set.
- Internal hard drive (Optional)
- MicroSD card slot (card not included) allows for mass storage and data protection
- Optional PaAS speaker bar—connects without wires or power supply
Keyboard
- 61 keys (C2 – C7)
- Semi–weighted keys with Velocity and Aftertouch
System
- Upgradable Operating System
- Multitasking, load while play feature
Sound Generator
- EDS-X (Enhanced Definition Synthesis-eXpanded)
- Filters with Resonance - Three band EQ for each track
Polyphony
- 128 Voices, 128 Oscillators
Effects
- Accompaniment/Song: 4 Insert Effects; 3 Master Effects (148 Types)
- Keyboard Tracks: 1 Insert Effect; 2 Master Effects (148 Types)
- Final Mastering Effects: Waves Audio Ltd. MAXX Suite (Includes MaxxEQ™, MaxxBass™, MaxxTreble™, MaxxStereo™, MaxxVolume™)
Voice Processor Technology by TC Helicon®
- Four-part Harmonizer, Double, µMod, Reverb, Delay, Filter, HardTune, Pitch Correction; plus Compressor, EQ, Gate (Adaptive Mic Setting on the Mic input)
Sounds / Drumkits
- Factory: More than 1,800 Factory Sounds including a new multilayer Stereo Piano with damper/body resonance, GM/XG sound sets and more than 90 Drumkits* including Ambient Drums
- User Area: 512 Sounds, 128 Drumkits
- Digital Drawbars: 9 Footages, Percussion, Key On/Off, Leakage (Effect section includes rotary speaker)
- Defined Nuance Control (DNC) Technology
- Natural Ambience Drums Sound
- Full Sounds/Drumkits editing
Sampling
- User PCM RAM Memory: 400 MB
- Load KORG, Wav, AIFF and SoundFont™ formats
- Save KORG, Wav and AIFF formats
- Full Edit, Time Slice, Sampling feature
Styles
- Factory: More than 500 Factory Styles, freely reconfigurable sets
- User: 1,248 locations, including User, Favorite and Direct banks
- Eight Accompaniment tracks, 4 Keyboard Sets, 4 Pads per Style; Style Settings (Sounds and Arranger parameters) on each Style
- Guitar Mode 2, Parallel and Fixed NTT (Note Transposition Table)
- Style Record with Step Record, Track and Event Edit
- MIDI Song to Style Converter
- Style controls: 3 Intros, 4 Variations, 4 Fills, Break, 3 Endings, Synchro Start, Synchro Stop, Tap Tempo/Reset, Bass Inversion, Auto Fill, Manual Bass, Memory, Accompaniment Mute, Drum Mapping, Snare & Kick Designation, Style to KBD Set Mode
Chord Sequencer
- Chord Sequence recorder in Style Play mode
- Chord Sequences can be saved to Style and SongBook En-tries
- Edit functions: delete, copy from Style/SongBook, import/export from/to SMF
Keyboard Set Library
- Memorize keyboard Sounds settings
- Factory: More than 340 Factory Keyboard Sets, freely recon-figurable
- User: 1,056 locations, including User and Direct banks
- “My Setting” special Keyboard Set
Song Play
- Patented XDS Crossfade Dual Sequencer Player with X-Fader Balance control
- Supported formats: MID, KAR, MP3 + lyrics, MP3+G
- 2 Players with separate Select, Start/Stop, Home, Rewind and Fast Forward controls
- Lyrics, Score, and Chord data can be displayed on screen, or on external video monitor
- Markers with Add, Delete, Edit and Loop functions
- Jukebox function
MP3 Player / Recorder
- Double MP3 Player and MP3 Recorder
- Transpose (+6/-5 semitones)
- Tempo change (±30%)
- Vocal Remover
- Records MP3 files including Styles, MIDI Songs, MP3 Songs, Keyboard Sounds, Pads, Microphone and Effects
Sequencer
- Quick Record (Backing Sequence), Multitrack and Step Record functions -
- Full-featured sequencer, 16 tracks, Up to 200,000 events, SMF (MID) native format
SongBook
- Fully programmable music database based on Styles, MIDI Songs (MID and KAR files), MP3 Songs with automatic selection of Style Play and Song Play modes
- User definable Set Lists, with Entries selectable from the control panel
- Filtering and sorting options
Compatibility
- "i-Series" models: Styles
- Pa-Series models: Styles, Performances, Programs/Sounds, Songs, SongBook Entries, Pads
Pads
- Four Assignable Pads + Stop Buttons
- Pad Record function
General Controls
- Master Volume; Fade In/Out; Keyboard-Acc/Song Balance Volume; Ensemble; Octave Transpose; Master Transpose; Quarter Tone and Arabic Scale memorized inside Keyboard Sets; Joystick (pitch + modulation); Ribbon; Mic Volume; Harmony/Double; Delay/Reverb; Mic Preset; Mic On/Off; Harmony On/Off; Double On/Off; 8 Assignable Sliders; Slider Mode; MP3 Volume; 3 Assignable Switches; Tempo +/-; Tempo Lock; Metronome On/Off; Dial; Up/+; Down/-; Search; Shift; Chord Scan (Lower, Upper); Split; Keyboard Tracks Sound Select and On/Off; Record
Control Inputs
- Damper pedal (support half-pedaling with optional DS-1H pedal)
- Assignable pedal/switch
- EC5 multiswitch pedal
Mic/Line Inputs
- Mic: Combo XLR balanced with Gain control and Phantom Power
- Line 1: Left/Right Jack (1/4") Line Input, balanced
- Line 2: Stereo Mini-jack (1/8") Line Input, unbalanced
Outputs
- Audio Output: Left/Right, Out 1, Out 2; (1/4" Jack) balanced
- Headphone Output x 1 (1/4" Jack)
- Video Out (RCA connector)
MIDI
- IN, OUT, THRU standard MIDI connectors
- USB to MIDI using the USB Device port
- 8 user definable MIDI Setups
Storage
Hard Drive:
- Pa4X 76: Standard
Micro SD card: (Card not included)
- Rear panel slot with plastic cover
USB Flash Drive: (Drive not included)
- 1 Front panel port
- 1 Rear panel port
Display
- 7” Wide capacitive color TouchView™ TFT display
Clock
- Internal System Clock
AC - Power Consumption
- 100-240 Volts, 50/60 Hz
- 0.5 Watt in standby / 16 Watt normal / 38 Watt with PaAS installed
Dimensions (W x D x H)
- 980 x 364.4 x 125.56 mm / 38.58" x 14.35" x 4.94"
Weight
- 13.9 kg/30.64 lbs
Accessories
- AC Power Cable, Music Stand, Accessory Disc containing the Video Manuals, additional manuals and software utilities
Options
- PaAS Amplification System
- ST-SV1 Keyboard Stand
- HDIK-3 Hard Disk Installation Kit (for 61 keys only)
- EC-5 External Controller
- EXP-2 Foot Controller
- XVP-10 Expression/Volume Pedal
- DS-1H Damper Pedal (support half-pedaling)
- PS-1 Pedal Switch
- PS-3 Pedal Switch
* Appearance and specifications are subject to change without notice.
** All product, company, and standard names are trademarks or registered trademarks of their respective holders.