<audio controls=controls>
<source src=„mySongComplex.aac“ type=„audio/mp4; codecs=mp4a.40.5“>
<source src=„mySongSimple.aac“ type=„audio/mp4; codecs=mp4a.40.2“>
</audio>
více např. v http://developer.apple.com/safari/library/documentation/AudioVideo/Conceptual/Using_HTML5_Audio_Video/
