Requesting browser MIDI access...
If this message does not go away, try unplugging any connected MIDI devices.
Your browser does not support the MIDI Web API.
Chrome (version 44+) or Opera (version 33+) required.
Your browser supports the MIDI Web API. However, MIDI authorization failed.
1. Click the lock icon next to the URL.
2. Look for “MIDI devices full control” at the bottom of the popup list, and
3. Set it to “Always allow on this site”.