In July(?) 2013, there were [changes made to the WebAudioAPI](https://developer.mozilla.org/en-US/docs/Web_Audio_API/Porting_webkitAudioContext_code_to_standards_based_AudioContext). At least one change causes `pico.js` to throw the following error in FireFox28: `TypeError: context.createJavaScriptNode is not a function`