Bluetooth setup
Fractal Remote · last updated 10 November 2026
Control your AM4, FM3, FM9, Axe-Fx III or VP4 from the app with no computer, through a Bluetooth MIDI adapter plugged into the unit. You need the full version.
1. What to buy
- AM4 or VP4: a CME WIDI Uhost (Amazon · CME), a CME C2MIDI Pro (Amazon · CME), two Type-A MIDI to 3.5 mm adapters (Amazon; Type B won’t work), and a phone charger.
- FM9 or Axe-Fx III: the WIDI Uhost, the C2MIDI Pro and a phone charger. Use FM9 firmware 7.00 or later, Axe-Fx III firmware 25.00 or later.
- FM3: the WIDI Uhost, a CME U2MIDI Pro (Amazon · CME), a USB-C to USB-A adapter (Amazon) for its plug, and a phone charger.
On an FM3, never use the C2MIDI Pro or a WIDI Master: both got very hot on one. Its MIDI OUT runs any adapter that draws power from it hot, even on USB power. The U2MIDI Pro doesn’t, and stays cool. If anything on an FM3 gets warm, unplug it at once.
Before the first time, update the Uhost in CME’s free WIDI app, then close that app.
2. Plug it in
- Turn the unit on and let it finish starting up.
- The cable’s black plug [TO MIDI IN] goes in the unit’s MIDI IN, the white plug [TO MIDI OUT] in its MIDI OUT (on an Axe-Fx III, OUT, not THRU). On an AM4 or VP4 they go in through the 3.5 mm adapters; a VP4 uses the black plug only.
- The cable’s USB plug goes in the Uhost’s left socket, USB Host/Device; the charger in its right socket, USB Power. 5 volts only.
- The Uhost’s right light goes steady green and its left one flashes blue: it’s ready.
3. Settings on the unit
- AM4, FM3 and FM9: Setup → MIDI/Remote → MIDI Thru: Off.
- FM9 and Axe-Fx III: in Setup → MIDI/Remote, also set Program Change on, the MIDI channel to 1 or Omni, PC Mapping off, MIDI PC Offset to 0, and Send Realtime Sysex on.
- VP4: in SETUP > MIDI/Remote, set Receive MIDI PC to ON and the MIDI Channel to 1 (or OMNI).
4. Connect
- In the app: Settings (the gear at the top right) → My rig → Bluetooth.
- Pick your unit, then tap Connect.
- iPhone or iPad: allow Bluetooth, tap your adapter on Apple’s screen, wait until it says Connected, then tap Done. If that screen shows no Done button, swipe it down to close it. Connect it in the app, not in the iPhone’s Settings → Bluetooth. Android: allow Nearby devices (Location, switched on, on Android 11 and older).
It says Connected · AM4 answering (or your unit) when it works. Quit the computer app while you use Bluetooth. A VP4 gets presets and scenes only.
Not working?
- Swap the two plugs if they are the wrong way round.
- The adapter takes one thing at a time: close CME’s WIDI app, and Bluetooth on any nearby Mac.
- Unplug the Uhost’s power for a few seconds, then tap Connect again.
- Close the app completely (swipe it away) and open it again.
- Still stuck? Tap Report a Bluetooth problem on the app’s Bluetooth page.
More ways to hook up, and more fixes, are on the app’s Bluetooth page.