No sound

This is usually the browser. Browsers keep a page silent until you've clicked on it, so click anywhere and try again. If you still get nothing, check Volume on the stage and make sure the tab isn't muted.

Keys not working

You probably don't have a Seat. Only seated players can play, and Join bounces if you try without one. If you do have a seat and it's the typing keys that aren't working, check that Settings›Play with your keyboard isn't set to Off, and click away from the chat box, because the keys stop while you're typing in it.

MIDI not showing

Safari can't see MIDI devices at all, so use Chrome or Edge. Plug the keyboard in, refresh, and look in MIDI›Input. The browser may ask for permission the first time.

Slow sounds

Sounds download the first time you pick one, and some of them are big (the sizes are on Instruments). It only happens once, since your browser keeps them after that.

Lag

Check that Settings›Direct connection is still on. It sends notes straight to the other seated players, which is usually quicker.

Opened elsewhere

Your account is open in another tab, and only one tab can be connected at a time. Close it or go back to that one.

Missing songs

Guests' songs aren't kept. If you have an account and deleted it, look in Song menu›Trash, where you can put it back.

Contact

With an account you can use Settings›Send feedback. Otherwise, email hello@jamphony.com or ask on the Discord.