Firefox was the first with a Web Audio API. Google has an alternate API. Neither one is a standard. Both are great ground for experimentation though.

Google named his one Web Audio API and Mozilla named is one Audio Data API.

Mozilla's Audio Data API is available since FF4.

Web Audio API has been enabled in Chrome 13 or 14, before it was off by default. Probably appeared shortly after FF4 (?)

Such non-standardization sucks balls if you ask me.

These guys should make HTML5 standards and stick to it. Not make the standard evolve every NEXT day saying "oh look its what HTML5 is now!"

That's absolutely non-standard and annoying as hell.