Thanks. The spatial audio is just a feature of the excellent https://howlerjs.com/ https://howlerjs.com/. But I added MIDI keyboard support to the secret fart

Thanks. The spatial audio is just a feature of the excellent https://howlerjs.com/ https://howlerjs.com/. But I added MIDI keyboard support to the secret fart piano recently and thus Firefox throws up a scary warning. It's now disabled unless you access https://frt.rip#midi https://frt.rip#midi. But you can also use your computer keyboard to play/fart a little tune, see Web Inspector for instructions :)