CME WIDI Jack Review (Keyboard → iPad / Mac / Windows 11)

After using MIDI cables for decades, the CME WIDI Jack feels like a real step forward: a wireless Bluetooth MIDI adapter that lets you play software instruments without long cables everywhere. I tested it across iPad (iOS), an older iMac (macOS), and a Windows 11 PC.

I tested with Pianoteq (I own the paid version), but that’s just one example — you can use any instrument, including free plugins and free instrument apps. The WIDI Jack is simply sending MIDI data.

Real-world workflow: play anywhere without MIDI cables

The biggest advantage I’ve noticed is simple: once the WIDI Jack is paired, my keyboard can sit anywhere in the music room, and I can play any device that supports Bluetooth MIDI (iPad, Mac, Windows) with a virtual instrument loaded. No long MIDI cables dangling everywhere.

Pro tip: Bluetooth MIDI connections are often “single-host”. If another device has already claimed the WIDI Jack connection, you may need to disconnect that device first before pairing to the next one.

My actual setup (photos)

CME WIDI Jack connected to an older 61-key synthesizer keyboard using standard 5-pin MIDI connections
WIDI Jack connected to an older 61‑key synth — a clean way to make classic 5‑pin MIDI gear wireless.
Close-up of CME WIDI Jack with blue status light and WIDI cables connected to MIDI OUT and MIDI IN ports
Close-up: status light and the two WIDI leads connected to MIDI OUT and MIDI IN.

Related: What is Wireless MIDI? • Wireless MIDI troubleshooting • Best wireless MIDI adapters (2026)

Back to: Wireless MIDI hub • Pillar guide: What Is Wireless MIDI?

Ad / affiliate block placeholder (CME WIDI Jack)

What the WIDI Jack is (plain English)

The WIDI Jack is a Bluetooth MIDI adapter that plugs into the standard 5-pin DIN MIDI ports on a keyboard/controller. Once paired, your iPad or computer sees it like a normal MIDI device.

iPad setup (iOS): easiest entry point

  1. Download the WIDI app from the Apple App Store.
  2. Power the WIDI Jack and open the app.
  3. Pair/connect the WIDI Jack in the app.
  4. Open a software instrument and play wirelessly from your MIDI keyboard.

Once connected, it was straightforward to load an instrument and play. The response felt immediate and very playable.

If you’re building an iPad + keyboard setup, Wireless MIDI is one of the cleanest ways to reduce cable clutter.

macOS setup (older iMac): Audio MIDI Setup

  1. Open Audio MIDI Setup (Utilities).
  2. Open the MIDI Studio window.
  3. Click the Bluetooth icon and select the WIDI Jack.
  4. Once connected, it appears like a normal MIDI device.

This worked quickly for me. I played Pianoteq wirelessly on macOS, and I also tested REAPER with virtual instruments — MIDI input behaved exactly like a normal controller.

Windows 11 setup: most involved (but worth it)

  1. Download and install the Korg BLE-MIDI driver.
  2. Ensure Bluetooth is enabled on the PC.
  3. Pair/connect the WIDI Jack.

Important pairing tip: disconnect other connections first

Windows pairing became much easier once I realised the WIDI Jack was still connected to my iPad. Disconnect the WIDI Jack from other devices first, then pair on Windows.

CME WIDI Jack latency test (iPad, Mac & Windows 11)

Your “feel” depends on both Bluetooth MIDI latency and audio driver latency. On Windows, using an ASIO driver can make the biggest difference.

Windows latency optimisation: ASIO4ALL

Installing ASIO4ALL reduced latency to around ~1.5ms (depending on buffer settings), which felt fantastic for playing virtual instruments.

If you’re setting up instruments in REAPER, see: How to Install VST Plugins in REAPER (Windows & Mac).

Pros and cons

Pros

Cons

Who this is perfect for

Related reading

Affiliate disclosure

Some links on this page may be affiliate links. If you buy through them, I may earn a small commission at no extra cost to you. This helps support Music Using Tech and keeps the guides free.