Excellent article about How to Embed MP3 Audio Files In Web Pages With Google or Yahoo! Flash Player. Here’s the guts of it:
Google Reader has an inbuilt MP3 player that is pretty much the same as Gmail player but it also works on non-Google websites. This player has volume controls, no Google branding and it auto-detects the duration of the music file so your readers know how long the song will last.
And there’s the HTML for it:
Let’s test it with a one of Jim’s Whole Wheat Radio recent :