It's a WebMidi editor for Yamaha XG compatible synthesizers, as a single page web app (all styles and scripts are embedded in-page). This is work in progress / proof of concept - a lot of the options are still missing. If you want to add stuff, please follow my naming conventions. There's a great XG parameter list over at http://www.studio4all.de/htmle/frameset091.html
How to use: Download the HTML file from the release https://github.com/mrfloydst/webxgmidi/releases/download/second/webxgmidi.html . Open that HTML file in a modern browser that supports WebMIDI (read: anything but Safari). Confirm your browser is allowed to use MIDI. You can use an external keyboard to play notes and send control data, this has a MIDI router built in.
I made this to have an interesting video on my YouTube channel, https://www.youtube.com/@mr_floydst ;-) Support me by streaming my music on Apple Music https://music.apple.com/de/album/not-my-hyena/1657940323
