This is just a simple test/demo of the HTML5 <audio> tag with which to test browser support.
Assuming you have a modern web browser, click "play" below to hear which audio format your browser defaults to. Below this, you'll see a form showing which major web formats your browser SAYS it supports, and buttons to click to try out the other formats (click the button, then press "play" in the audio controls, and see if it works).
NOTE: Feel free to try formats that the browser claims it doesn't support - the browser may be lying.
Internet Explorer 9 or later: I recommend installing the free
WebM Components for Microsoft Media Foundation to enable playback of WebA audio (and WebM video) as well as creation of WebM files via any software that uses
the Microsoft Media Foundation system.
Windows users may also want to install the also-free Xiph DirectShow Filters to add
support for the high-quality, legally-free "Vorbis" audio codec (and "Ogg/Vorbis" files) along with FLAC, Speex,
and other legally-free audio and video formats.
Safari: I recommend installing the free WebM Quicktime Component, which not only enables Safari to play weba audio (and webm video) but also allows any other QuickTime-using software to play or create WebM media. You may also want to install the also-free XipQT QuickTime Component which does the same for Ogg Vorbis audio, as well as FLAC, Speex, and several other legally-free formats.
Android Browser: ALL versions of Android come with built-in Ogg Vorbis audio support, but support for the HTML5 <audio> tag wasn't added until the "Gingerbread" release (Android 2.3). For some odd reason, Android browser reports that it doesn't support WebM Audio, but it actually does (This is a known bug since August 2011 in "Gingerbread", and still present in the current "Ice Cream Sandwich" version - Wake up, Google!).
iOS: You're stuck with just the few proprietary formats that Apple corp. permits you. On this page, that's just mp3. Sorry, nothing anyone can do as long as Apple forbids you access to other formats.