signal is an app that I personally make as a hobby. Please forgive all kinds of bugs. If you agree with the concept of lightweight composer software that runs in a browser, please support me. I would be grateful if you could report bugs, recommend to others, and sponsorship.
http://signal.vercel.app/
origin - https://www.pipiscrew.com/2020/09/fully-open-sourced-online-midi-editor/ fully-open-sourced-online-midi-editor