This audio element has mp3 (required for iPod), aac (Safari, Chrome), and ogg (Firefox, Chrome) sources.
Your browser does not support the
element properly. iPod only plays mp3s :
Firefox requires ogg (WebM):
RFC 4337 mimetype is audio/m4a:
Most common mimetype in google search is audio/mp4a-latm:
Browsers' FileAPI report file.type as this mimetype, but Safari does not honor it:
Safari (but not on iOS 4.2) only works without a mimetype: