Request for TCP MIDI Events Exposure During Playback or General Use of MuseScore

[jimishol]

Background

In my previous post How MuseScore motivated me to read about harmony, I introduced a 3D harmony structure that projects notes, chords, and scales as geometric entities in real time. Despite my limited programming background, I turned that idea into a working prototype:

Cholidean Harmony Structure
https://github.com/jimishol/cholidean-harmony-structure#cholidean-harmony-structure

The Challenge

Today, no MIDI application I know—MuseScore included—ever exposes the fundamental Note On/Off (or velocity=0) events outside its own audio engine. My visualizer (written in Lua) can only abuse FluidSynth’s console output.

Feature Request

Could MuseScore offer an optional TCP-based MIDI event stream? In practice, this would be a lightweight server you toggle in Preferences (or via a tiny QML plugin) that broadcasts every note-on/note-off over a socket. My Lua tool could then connect with plain TCP—no extra libraries—let the events flow, and render harmony in 3D live.

Basic Requirements

• Host default: 127.0.0.1
• Port default: 9000
• Data format: raw MIDI bytes (hex/decimal) or simple text lines, for example:

  90 3C 64   ← noteOn, channel 1, Middle C, velocity 100  
  80 3C 40   ← noteOff, channel 1, Middle C, velocity 64
  

• Zero impact on existing audio/MIDI pipeline
• Minimal UI: just a checkbox and host/port fields

Why This Matters

• Enables truly live external visualizers and teaching tools
• Eliminates file-export and console scraping hacks
• Fosters innovative plugins and community-built performance interfaces.
• Puts MuseScore ahead of other apps by offering a real-time MIDI feed

Questions for the Community

1. Has anyone else needed raw MIDI event streaming from MuseScore?
2. Are there hidden hooks or plugin APIs I’ve missed?
3. Would a raw-byte TCP approach fit MuseScore’s architecture?
4. What minimal UI/UX would you recommend for configuration?

Thank you for reading—and for any pointers on making MuseScore a real-time MIDI server. I believe this small addition could unlock a whole new class of educational and creative tools!