Node.js WebSocket MIDI server

13 Dec 2021

Background

• ESP32-S2 supports composite USB, but not reliably including MIDI
• Wireless MIDI is a “thing” (but mostly Apple MIDI via UDP)
• MIDI over TCP is reliable, but needs WebSocket for speed
• mnet MIDIHub serves some unsupported flavor of WebSocket MIDI for TouchDAW
• Many WebSocket MIDI implementations are in JavaScript,
  mostly for Node.js.
• WebMIDI is about browser-based MIDI apps, not necessarily networked.
• WEBMIDI.js implements WebMIDI for Node.js,
  but is also specifically about locally-attached MIDI devices,
  not WebSocket MIDI
• node-midi is basic MIDI I/O (device) support for Node.js

node-midisrv is a MIDI websocket client & server, running on node.js

- does *not* include a browser JavaScript client
- server does not receive by WebSocket and send to device
- includes [mididump.js for debugging](https://git.nroo.de/norwin/midiserver) - [midisocket](https://github.com/vine77/midisocket) is another Node.js websocket MIDI client-server;     server simply echoes binary MIDI back to client[s]. - [midiServer](https://github.com/PauloSeb/midiServer) is yet *another* MIDI websocket nodeJS server *in a single file*     using MIDI by utf8 JSON   - [midi-websocket](https://github.com/fa-m/midi-websocket) has a simple Node.js websocket server and browser client - [fork](https://github.com/fa-m/midi-websocket)     server is simple echo broadcaster - [James Byrd wrote a WebSocket MIDI article](https://medium.com/@jbprojectlab/how-to-make-a-real-time-music-application-using-websockets-56776990c558) about using Node.js   - [Tutorial: How to create a MIDI synthesizer with MIDI API and Node JS](https://medium.com/nebo-15/tutorial-how-to-create-midi-synthesizer-with-midi-api-and-node-js-48d41c162009)

MIDI WebSocket for JavaScript, a browser WebSocket MIDI client

also Node.js client and server with log4js; whether and how compatible with e.g. mnet MIDIHub is unknown..
Its WebSocket MIDI is binary and bridged to local MIDI devices and also broadcast to other WebSocket clients

• HTML5 - WebSockets includes Client Side HTML & JavaScript Code
• How to Set Up a Websocket Client with JavaScript