This image is from the Wikipedia page on Data URI scheme

And here is an audio tag, using a converted version of /usr/share/sounds/KDE_Beep_Door.wav

• Does work in Firefox 3.5.9 on Fedora 12
• Does work in Firefox 3.6.8 on Snow Leopard
• Does not work in Firefox 3.6.8 on XP
• Does not work in Iron on WinXP or Chrome on Snow Leopard
• Works in Opera.
• Works in Safari on XP, Win7, Snow Leopard (assuming you have QuickTime)
• Does work in Firefox/Minefield 4 beta 4 on XP

KDE_Startup.wav

• this does work in FF on WinXP
• Does not work in Iron on WinXP or Chrome on Snow Leopard
• Works in Opera.
• Works in Safari on XP and Win7 (assuming you have QuickTime)

And now audio using data URI version of KDE_Beep_Door.wav

• Does work in Firefox 3.5.9 on Fedora 12
• Does not work in Firefox 3.6.8 on XP
• Does work in Firefox/Minefield 4 beta 4 on XP
• Does not work in Iron on WinXP or Chrome on Snow Leopard
• Works in Opera XP
• Works in Safari on XP and Win7 (assuming you have QuickTime)

An MP3 to see if Chrome likes that - it does on Snow Leopard, but Iron on Win7 doesn't

Some references on the audio tag:

• https://developer.mozilla.org/en/using_audio_and_video_in_firefox
• https://developer.mozilla.org/En/Media_formats_supported_by_the_audio_and_video_elements
• http://gonze.com/xipf/datauri/

Some tests using files from the Azoff piano to try to work out why I'm getting bad latency in Firefox (and Safari IIRC - but not Opera)...

An MP3 - doesn't work in Firefox (Minefield), not surprised

A 16-bit sterero 44.1khz WAV, this seems to respond ASAP zzz

My 8-bit mono 8 khz WAV - this has latency in FF

My 8-bit mono 44.1 khz WAV - this is responsive in FF :-) but is crackly :-(

My 8-bit stereo 44.1 khz WAV - Firefox plays horribly, Opera not at all, WMP doesn't like either

My 16-bit stereo 44.1 khz WAV