WIDI Master
Premium Bluetooth MIDI
Make Your MIDI Device Wireless
WIDI Groups
Build your Bluetooth MIDI group in seconds. Set it once.
From then on, everything connects automatically - every time you power up.
No re-pairing. Just play.
What is WIDI Master?
Go Wireless Without Changing Your Setup
Turn your existing MIDI gear into a wireless setup. Simply plug in WIDI Master and enjoy the freedom of Bluetooth MIDI. No computer or complicated installation required.
Start Playing Instantly
Simply plug in, pair once, and start making music right away.
Stable Wireless Performance
Enjoy a fast, reliable Bluetooth MIDI connection with up to 20m / 65ft of range.
Feels Like a Cable
Ultra-low 3ms latency delivers a natural and responsive playing experience.
Pair Once. Play Forever.
No menus or re-pairing. Your WIDI devices reconnect automatically every time.
Complete MIDI Compatibility
Transmit notes, CC, Clock, SysEx, MPE and more. Just like a wired MIDI connection.
Compact & Stage Ready
A clean, compact design that keeps your setup simple on stage and in the studio.
Connect More Devices
Create wireless MIDI splits, merges and fixed pairs with expansion up to five devices.
No Extra Power Required
Powered directly from your MIDI Out port—no USB cable or power adapter needed.*
Ready for the Future
Free firmware updates add new features and improve compatibility over time.
Optimized Your Way
Fine-tune latency and stability with the free WIDI App (iOS/Android).
Wireless You Can Trust
Behind every WIDI device is our Smart Connectivity Algorithms (SCA) technology. It continuously optimizes the Bluetooth connection to reduce latency, minimize interference, and maintain a stable performance - even in busy wireless environments.
The result? A fast, reliable MIDI connection that simply feels natural.
- As low as 3ms latency between two WIDI devices
- Adaptive Frequency Hopping automatically avoids interference
- Up to 400 kbps data throughput for demanding MIDI applications
- Optimized for live performance and studio use
What can you do with MIDI over Bluetooth?
Less Cabling. Less Setup. More Playing.
Connect Two MIDI Devices Wirelessly
Replace long MIDI cables with two WIDI Masters and enjoy complete wireless freedom between your instruments.
Connect a Bluetooth Controller to Classic MIDI Gear
Play any MIDI hardware directly from a Bluetooth MIDI keyboard, controller, or pedal - without needing a computer.
Play Your Hardware from Your Computer, Tablet, or Phone
Connect macOS, Windows, iPad, Android, or Linux wirelessly to your MIDI equipment for recording, editing, or live performance
Build Your Wireless MIDI Network
Connect up to five WIDI devices in one group with automatic reconnection. Create fixed pairs or wireless MIDI split, merge, and thru setups that remember your configuration every time you power on.
What does Roger Linn say about WIDI Master?
What industry leaders say about us
CME WIDI is the first Bluetooth MIDI adapter that can perform as both a “peripheral” or “central” device, allowing fast, low-latency, and stable point-to-point wireless connections between any two devices.
TOM WHITE
Former President of MMA
I (Roger) have tested WIDI and found it to be well-designed, fast, easy to use and low-cost. Interestingly, CME have figured out how to get the latency down to as low as 3 ms, which is quite an accomplishment. In my test playing 3-note chords and melody with 3D MPE expression, I didn't perceive any added latency or delays normally associated with Bluetooth.
ROGER LINN
CEO RogerLinn Design
We at teenage engineering are super happy that CME chose to make this super-useful accessory for the K.O.II. I've known the team behind CME for 16 years, so it was about time this happened. the EP-series WIDI will open up lots of fun use-cases in the studio as well as on the campsite.
DAVID ERIKSSON
Head of hardware teenage engineering
I was lucky enough to be able to start working with a pair of prototype WIDI adapters from CME. They worked flawlessly and transparently. For example, I immediately had our flagship synthesizer, the Moog ONE, controlling and being controlled by our older MIDI instruments and vintage MIDI controllers.
CYRIL LANCE
Former CTO MOOG Music
Discover the WIDI family
Bluetooth MIDI solutions. Connect all your MIDI devices!
Which WIDI Do You Need?
Technical Specification
As low as 3ms between 2 WIDI devices without obstacles in "low latency mode"
Technical Specification | WIDI MASTER | WIDI JACK | WIDI Uhost | WIDI BUD PRO |
|---|---|---|---|---|
Bluetooth 5 | Each WIDI device implements high-performance Bluetooth Low Energy 5 (BLE 5) with twice the speed, four times the range and Adaptive Frequency Hopping technology for minimal interference, secure connectivity and optimal wireless performance. | |||
Latency | As low as 3ms between 2 WIDI devices without obstacles in "low latency mode" | |||
Jitter | Sub 1ms variation between 2 WIDI devices without obstacles in "low jitter mode" | |||
Range | 20m/65ft without obstacles | |||
Power | Only via MIDI power. No external power option. | Via MIDI power or external via USB-C port | Via USB bus-power or external via USB-C port | Only via USB bus-power. No external power option. |
WIDI App | Available for free for iOS and Android via AppStore & Google Play | |||
WIDI Groups | Easily configure WIDI groups via WIDI app or with group auto-learn. Create fixed pairs and 1-to-4 MIDI Split/Thru or 4-to-1 MIDI Merge with one (1) central WIDI device and up to four (4) peripherals consisting of WIDI or standard Bluetooth MIDI devices over 16 MIDI channels. Run multiple groups at once with automatic pairing from default memory. | |||
Automatic Pairing | Between WIDI devices and with standard BLE MIDI controllers. | |||
Compatible OS via Bluetooth (Manual paring) | With iOS, macOS and Android via integrated BLE MIDI. With Windows 10/11 via Korg BLE MIDI drivers. | |||
Compatible OS via USB | N/A | N/A | macOS, iOS, Windows, Android, Linux, ChromeOS | macOS, iOS, Windows, Android, Linux, ChromeOS |
Special |
Work with all MIDI devices with 3.3v or 5v MIDI Power via 5-PIN MIDI OUT ports. Does not work with devices with only MIDI IN or unpowered MIDI Out. Check the instruction manual of your device. |
Accessory cables available for TRS MIDI and DIN MIDI ports. Also works with devices with only MIDI IN or unpowered MIDI ports via external USB-C power. |
Works with all "class compliant" USB MIDI devices. Smart power distribution for bus-powered USB devices. Only works as a USB device with USB hubs. Works with the 1st USB MIDI port for USB devices with multiple (virtual) MIDI ports. Works as USB host with USB OTG cables. |
Adds premium Bluetooth MIDI to all operating systems, including Linux and ChromeOS. Bypass wireless MIDI limitations of iOS/macOS. Enjoy auto-pairing and group auto-learn for WIDI and Bluetooth MIDI controllers with optimal latency and jitter performance. |
Technical Specification | WIDI MASTER |
|---|---|
Bluetooth 5 | |
Latency | As low as 3ms between 2 WIDI devices |
Jitter | Sub 1ms between 2 WIDI devices |
Range | 20m/65ft without obstacles |
Power | Only via MIDI power. No external power option. |
WIDI App | |
WIDI Groups | |
Automatic Pairing | Between WIDI devices and with standard BLE MIDI controllers. |
Compatible OS via Bluetooth (Manual paring) | With iOS, macOS and Android via integrated BLE MIDI. With Windows 10/11 via Korg BLE MIDI drivers. |
Specifications are subject to change without notice.
Press & Awards
Press & Awards
Contains MIC : 211-200902
Contains MIC : 211-240611
Contains IC : 25657-BLEM205
Contains FCC ID : 2ABRUBDLEM205
FCC Statement
Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
