I am wanting to expand on my Interactive Chords sketch by adding video snapshots for each user to identify themselves and then make a way to orchestrate the users to play a song together. I imagine some Guitar Hero-style interface where the users must move their mouse to the incoming note, but they should also try to balance themselves out so that too many people don’t get stuck in one place before the next note comes. Then they could try to move the mouse to hit the note targets as the song progresses.
I could also act as a super-user conductor to direct the players to areas on the page where the notes will need to happen. One issue of course will be timing since music is so dependent on rhythm. Below is a quick prototype of the notes moving by and a link here to the code.