FM-1 Relay 2.0 — one tempo, every FM-1

One tempo. One transport. Every FM-1 on the same downbeat.

This is the first open-source release of FM-1 Relay, on the web and on iPad. It is a MIDI clock master for up to four M-VAVE FM-1s, whatever open-source firmware they run.

▶ Open the web app

There is nothing to install. It runs in Chrome, Edge, Opera or Firefox on a computer or on Android. Use Menu › Install to give it its own window and offline use. Press TRY DEMO UNITS to try it without hardware.

What's new

FM-1 Relay for the web

The relay now runs in the browser too.

• Four hot-plug slots: each FM-1 takes the next free slot and keeps it.
• Firmware detection by port name and FL-protocol INFO reply, for SLOOP, Felucca, Skiff, JIANT, X0X and ECHOFIELD. A setup line gives the exact menu setting each one needs.
• Late join in phase: a unit switched on or plugged in mid-song waits for the next bar or beat.
• Look-ahead scheduling with Web MIDI timestamps, driven from a worker so the clock stays steady in background tabs.
• ECHOFIELD: START and STOP also go out as CC 104, and the delay follows the tempo by CC 85.
• Tap tempo, drag or scroll the digits, PING to find a unit, full keyboard control, screen wake lock.
• Installable PWA with an offline cache.

FM-1 Relay for iPad

The same relay as a native SwiftUI + CoreMIDI app. It drives four FM-1s on a USB-C hub and keeps running in the background. Build it from ipad/ with Xcode 16.

See the changelog for everything else.

Notes

• Safari and iOS / iPadOS browsers have no Web MIDI. On iPad, use the native app.
• Allow SysEx when the browser asks, so the relay can read each unit's firmware and version.
• FM-1 Relay is a community project. It is not affiliated with M-VAVE or with the firmware authors. MIT licence.