Best way to play wav files in the browser?

I have no choice but to play wav files directly in the browser (serverside encoding to mp3 isn’t an option, unfortunately.)

What’s the best way to do this? I’d really like to take advantage of the HTML 5 audio tag but my target audience includes many, many teens using IE6. As far as I’m aware flash isn’t an option, but speedy playback really is critical.

Thanks.

Best way to play wav files in the browser?