Nice idea, but .. Just thought I'd better report: Doesn't work for me at all on OSX, Safari 9.0.1 .. on Firefox 42.0, it works, but the GUI renders improperly and the controls don't respond to mouse events, but it plays sound when I hit the QWERTY keyboard .. Chrome 46.0.2490.86, it renders the GUI properly, plays sound, but doesn't really react to mouse events on the knobs as smoothly as I would expect of a synthesizer - very jerky. Also, presets don't seem to work.