BLOCK EDIT.

// CONNECT YOUR RIG

You need a unit connected — there’s no demo data, so an empty screen just means it isn’t seeing your hardware yet. Block Edit works with the Axe-Fx III and the full Axe-Fx II family:

• Axe-Fx III— connect over USB. It’s class-compliant, so plug it straight into your iPad or iPhone (USB-C, or a camera adapter) and it shows up.
• Axe-Fx II, Axe-Fx II XL, and Axe-Fx II XL+(including the original Mark I and Mark II) — use a Bluetooth MIDI adapter (e.g. WIDI) or a 5-pin DIN MIDI interface. The II’s USB isn’t iOS-compatible.

When it connects, the top bar names the unit and turns green.

// GOING WIRELESS — THE WIDI ADAPTER

A WIDIadapter (by CME) is a small Bluetooth-MIDI dongle that plugs into a Fractal unit’s 5-pin DIN MIDI ports and connects it to your iPhone or iPad over Bluetooth. Hook it to MIDI IN and OUT, pair it in iOS Bluetooth, and you’re on the air — no cables. It draws power from the MIDI port itself, so there are no batteries to charge or replace.

The exact adapter we’ve tested with — WIDI on Amazon →

// WHAT TO TEST

Run these and tell me anywhere the app and the unit disagree:

• Connect — does the top bar show the right model (II vs III) and go green?
• Presets & scenes — on the GRID page, step through presets and scenes. Does the unit follow instantly?
• Amp edit — on EDIT, move the knobs and flip Boost / Cut / Fat / Bright. Do the app and the unit stay in sync?
• Grid— does the routing shown match what’s on your unit’s screen?
• Tuner & tap — does the tuner engage, and does tap-tempo land?
• Perform — does the PERFORM pad feel right under your thumb?
• Unplug mid-session — does it disconnect cleanly (no freeze, no crash) and recover when you reconnect?

// KNOWN LIMITATIONS — NOT BUGS as of June 17, 2026

• Axe-Fx II scene names— the II doesn’t store scene names, so Block Edit shows scene numbers there.
• Wah, Cab, and Synth blocks aren’t calibrated yet— they’re intentionally locked so a wrong value can’t reach your rig.
• No preset import/export yet — editing is parameter-by-parameter for now.

// HOW BLOCK EDIT GETS BUILT

Fractal doesn’t publish the SysEx protocol. Everything Block Edit knows about how to talk to an Axe-Fx was reverse-engineered by watching the bytes that flow between Axe-Edit and the unit — call it probing. We’ve done this on the Axe-Fx III and the Axe-Fx II XL from scratch.

Every Fractal unit announces itself with a one-byte ID inside a SysEx header that starts with F0 00 01 74. That byte is all we need to add support for a new unit. If you own an Axe-Fx model we haven’t confirmed yet, you can grab it in about two minutes.

If none of that sounds fun, just email and we’ll do a 2-minute screen share. Either way, paste your unit model, firmware version, and the F0 00 01 74 line into the form below and we’ll have your unit in the next build.

// FOUND A BUG?

In the app: tap the connection indicator in the top bar — the small icon that shows your connection status and turns green when a unit is online. That opens the Connection panel; Report a Bug is the last section, at the bottom. It builds an email with app version, your device, your connected unit, and the raw MIDI log — you review it before it sends.

The more detail you give — what you did, what the unit did, what the app did — the faster it gets fixed. Or use the form below.