Sorry, my bad. I meant you can't set FFTSIZE higher than 2048 and we need at least 8192 to identify notes correctly (at least in Safari). Does Firefox allow higher FFTSIZE than the default?
[0]: https://webaudio.github.io/web-audio-api/#dom-analysernode-f... [1]: https://github.com/WebAudio/web-audio-api/issues/375