There are 2 repositories under midi-file topic.
🎹 Play and display MIDI files on the web
Standard MIDI Files (SMF) Processing Library
Standard MIDI Files: read / write / play
A framework for producing test MIDI files
Command line tools to work with MIDI files
🎵 Split MIDI tracks with multiple instruments! Convert MIDI to FLP! 🎵
MIDI Player for browsers
JavaScript MIDI file writer
Melodfy✨: AI-Powered Piano Audio to MIDI Converter 🎶