here's also a DEMO video of me playing

Connect musically online with friends using a MIDI compatible piano or keyboard. Great for jamming, collaboration, music lessons over the internet. This product I've built aims to be a tool for online jamming with high-quality virtual instruments and low ping. Helpful for jam sessions and collabs remotely. Give the app a little go at https://jamhub.io — create room, share link with friends and let me know what you think!

And this is also an app review and walkthrough: