Audio data URI
Turns out that you can use data URIs in the <audio> tag. Just upload an MP3 file to http://dataurl.net/#dataurlmaker and you’ll get a long string starting with data:audio/mp3;base64... Insert this into your HTML: <audio controls src=”data:audio/mp3;base64...”> That’s it – the entire MP3 file is embedded into your HTML page without requiring additional downloads. This takes a bit more bandwidth than the MP3, and won’t work on Internet Explorer. But for modern browsers, and small audio files, it reduces the overall load time – sort of like CSS sprites. ...