I\'ve been looking around and I\'m starting to worry that this isn\'t possible.
Is there any way to make a standard tag with fallbacks...
I did a small PONG-game with WebGL and some audio-tags for the sounds. I borrowed the audio-implementation from Opera's Emberwind HTML5 implementation: https://github.com/operasoftware/Emberwind/blob/master/src/Audio.js
Their solution worked fine for me (Chrome, Opera and Firefox). Maybe it could be of interest to you? They have some code that will try to find a playable format from line 22 and below.