http://fowlertown.com/projects/terry/widgets/audio.html
Or if you don't want to click the link, here is the code that matters:
<audio type="audio/mpeg; codecs='mp3'" controls src="sample.mp3">Your browser does not support the HTML5 <audio> element.</audio>
This isn't showing up in Firefox 15.0.1 and 16.0.1 on Mac OS X 10.7.4 which depresses me because this is crazy simple HTML5 code. It pops up for a fleeting moment on load but then disappears. It doesn't even show the fallback text.
Thoughts? Is it working for Windows users?
edit: http://html5doctor.com/html5-audio-the-state-of-play/ is where I got my browser support list, which indicates FF has supported the audio element (MP3 codec) since version 3.6.