I'll look into more webkit browsers -- I know on my Nexus S webkit browser, it has awful performance, but the audio plays. If the webkitAudioContext/AudioContext isn't found, it falls back to the Mozilla implementation, which is an extension of the non-fancy HTML5 audio, which means it will play audio, just be unable to read the frequency data from it -- and while the glowy balls move around independent of that data, there'll just be no boom and shaking due to absence of the frequency data :)

Now to build Chromium and try on vanilla Webkit..