Introduction
The KORG i3 Arranger Keyboard is a versatile music workstation designed for creative expression. It features a comprehensive collection of over 800 meticulously designed sounds, including a complete GM2 sound set and 59 custom Drum Kits, powered by a high-fidelity PCM sound engine. With 61 full-sized, velocity-sensitive keys and customizable touch curves, it offers enhanced playability. Intuitive transpose buttons and a dynamic joystick provide real-time pitch modulation. The i3 is portable and can operate on 6 x AA batteries, allowing for performance anywhere.
The operating panel includes a bright, clear display that shows the currently selected sound and style names for great visibility. Buttons are illuminated by LEDs, helping to visualize the setting of each function. The innovative Performance Recording mode enables comprehensive audio capture, allowing you to export MIDI data files or capture full performances as audio WAV files. With various connection options, including USB-to-host and USB-to-device, along with compatibility for headphones, foot controllers, and other MIDI equipment, the i3 adapts effortlessly to diverse musical environments.
This manual provides essential information for setting up, operating, maintaining, and troubleshooting your i3 Arranger Keyboard.

Image: Front view of the KORG i3 Arranger Keyboard in silver, showcasing its 61 keys and control panel.
1. Setup
1.1 Unpacking and Contents
Carefully remove all components from the packaging. Ensure the following items are present:
- KORG i3 Arranger Keyboard
- Music Stand
- Power Supply
Retain the original packaging for future transport or storage.
1.2 Connecting Power
The i3 can be powered using the included AC adapter or 6 x AA batteries (not included).
AC Adapter Connection:
- Connect the DC plug of the included power supply to the DC 9V jack on the rear panel of the i3.
- Plug the AC adapter into a standard wall outlet.
Battery Installation:
- Ensure the unit is powered off and disconnected from the AC adapter.
- Open the battery compartment cover on the underside of the keyboard.
- Insert 6 x AA batteries, observing correct polarity (+/-).
- Close the battery compartment cover securely.
Note: When using batteries, the keyboard will automatically switch to battery power if the AC adapter is disconnected. Remove batteries if the unit will not be used for an extended period.
1.3 Attaching the Music Stand
Insert the music stand into the designated slots on the top panel of the i3 Arranger Keyboard.
1.4 Audio and Data Connections
The i3 offers various audio output and data connection options:
- Headphones: Connect standard 3.5mm stereo headphones to the HEADPHONES jack for private listening.
- LINE OUT L/MONO, R: Use these 1/4-inch jacks to connect to an external amplifier, mixer, or audio interface. Use both for stereo output, or the L/MONO jack for mono output.
- AUDIO IN: Connect an external audio player (e.g., smartphone, MP3 player) to the 3.5mm AUDIO IN jack to play along with your favorite tracks.
- USB-to-Host: Connect the i3 to a computer using a USB cable for MIDI data transfer. This allows the i3 to function as a MIDI controller or to receive MIDI data from software.
- USB-to-Device: Connect a USB flash drive to this port for saving and loading user data, MIDI data files, or audio WAV files.
- MIDI OUT: Use a standard 5-pin MIDI cable to connect the i3 to other MIDI-compatible instruments or devices.
- FOOT CONTROLLER: Connect an optional foot switch or expression pedal for hands-free control over various functions.

Image: Rear panel of the KORG i3 Arranger Keyboard, highlighting the power input, USB ports, MIDI out, foot controller input, audio input, and line output jacks.
2. Operating Instructions
2.1 Powering On/Off
Press the POWER button located on the top panel to turn the unit on or off. A brief startup sequence will occur.
2.2 Navigating the Display and Controls
The i3 features a clear central display and illuminated buttons for easy navigation and function selection.

Image: Close-up view of the KORG i3's central display and surrounding control buttons, showing current sound and style names.
- The display shows currently selected sounds, styles, and other parameters.
- Use the CATEGORY buttons and ENTER button to browse and select options.
- Illuminated buttons indicate active functions or settings.
- The joystick allows for real-time pitch bend and modulation control.
2.3 Sound Selection
The i3 includes over 800 sounds and 59 custom Drum Kits. Sounds are organized into categories for quick access.
- Press the SOUND SET button to enter sound selection mode.
- Use the CATEGORY buttons or data entry knob to scroll through available sound categories.
- Select a desired sound using the corresponding buttons or by pressing ENTER.
- Utilize the UPPER/SPLIT and LOWER buttons to layer sounds or split the keyboard for different sounds on each hand.
2.4 Style Performance
The i3 features various accompaniment styles to enhance your performance.

Image: Close-up view of the KORG i3's style performance section, showing illuminated buttons for different parts and chords.
- Press the STYLE PERFORMANCE button to activate style mode.
- Select a style using the CATEGORY buttons or data entry knob.
- Press START/STOP to begin or end the accompaniment.
- Use the PART MUTE buttons to individually control accompaniment parts (e.g., drums, bass, chords).
- Adjust the tempo using the dedicated TEMPO buttons or the TAP TEMPO function.
- The VARIATION buttons allow for changes in the style's arrangement.
2.5 Performance Recording
The i3 allows you to record your performances as MIDI data files or audio WAV files.
- Connect a USB flash drive to the USB-to-Device port.
- Press the PERFORMANCE REC button to enter recording mode.
- Follow the on-screen prompts to select recording type (MIDI or Audio) and start recording.
- Press STOP to end the recording.
- Your recorded file will be saved to the connected USB flash drive.
3. Maintenance
3.1 Cleaning
- Wipe the exterior of the keyboard with a soft, dry cloth.
- For stubborn dirt, slightly dampen the cloth with water and a mild, non-abrasive cleaner, then wipe dry immediately.
- Do not use abrasive cleaners, solvents, or alcohol, as these can damage the finish.
- Avoid spraying liquids directly onto the keyboard.
3.2 Storage
- Store the i3 in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity.
- If storing for an extended period, remove batteries to prevent leakage.
- Cover the keyboard with a dust cover to protect it from dust and debris.
4. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | AC adapter not connected properly; Batteries depleted or incorrectly inserted. | Check AC adapter connection and wall outlet. Replace batteries or ensure correct polarity. |
| No sound | Volume too low; Headphones/speakers not connected; Incorrect audio output selected. | Increase master volume. Ensure headphones/speakers are connected and powered on. Check audio output settings. |
| Keys not responding | Keyboard in a mode that disables key input; MIDI settings issue. | Restart the unit. Check MIDI settings if connected to external devices. |
| USB drive not recognized | Improperly formatted USB drive; Drive not fully inserted. | Ensure USB drive is formatted to FAT32. Reinsert the drive. Try a different USB drive. |
5. Specifications
| Feature | Detail |
|---|---|
| Brand | KORG |
| Model Name | i3MS |
| Color | Silver |
| Number of Keys | 61 (Velocity-sensitive) |
| Skill Level | Beginner |
| Special Feature | Portable |
| Operating System Compatibility | Standard USB (Windows, macOS, Linux) |
| Connector Type | USB-to-Device, USB-to-Host |
| Connectivity Technology | USB |
| Power Source | Battery Powered (6 x AA) / AC Adapter |
| Headphones Jack | 3.5mm Jack |
| Item Weight | 12.9 Pounds (approx. 5.85 kg) |
| Item Dimensions (L x W x H) | 40.83 x 11.65 x 3.15 inches (approx. 103.7 x 29.6 x 8 cm) |
| Instrument Type | Synthesizer / Arranger Keyboard |
6. What's in the Box
The KORG i3 Arranger Keyboard package includes:
- KORG i3 Arranger Keyboard
- Music Stand
- Power Supply
7. Warranty and Support
7.1 Warranty Information
The KORG i3 Arranger Keyboard comes with a 1-year manufacturer warranty. Please retain your proof of purchase for warranty claims. For detailed terms and conditions, refer to the warranty card included with your product or visit the official KORG website.
7.2 Customer Support
For technical assistance, troubleshooting beyond this manual, or service inquiries, please contact KORG customer support. You can find contact information and additional resources on the official KORG website: