midi

Each MidiAction is a custom payload sent through the CustomPayload system, so a client can pass a MIDI-style action to the server and the server can react to it. The payload is encoded with FriendlyByteBuf and carries a packet ID so both sides know how to read it. On Minecraft 1.20.5 and higher the mod uses the CustomPacketPayload API for registration and handling.

The server side registers a global receiver that handles incoming MidiAction payloads. Authors describe the intended use as driving in-game instruments, sound systems, lighting effects and other MIDI-reactive features, so the mod works as a messaging layer for those systems rather than as a feature on its own. Fabric API is required.

The mod is client-side only in its environment label, which means only the client needs it installed; the server handles the payloads through its own receiver. Files cover 11 release versions 1.20.5 – 1.21.8, with 1.0.0 for 1.21.8 as the latest Fabric file, published 2025-08-01. It is not open source and is released under All rights reserved, though source code and an issue tracker are linked publicly.