mp3 audio works in all browsers but not IE9

Question

I have three mp3 audio files that play fine in all browsers but play for only 1.x seconds in IE9 unless I change \"controls\" to \"autoplay\" in which case it plays just fine. <

Answer 1

EDIT: My fix didn't work. It still fails in IE9 but everything works still in every other browser.

An answer to my own question that solves the problem, at least, but I have not found out why.

I don't know why some mp3 files play just fine in IE9 but others, that also work well in any modern browser, won't play in IE9 using the markup I show above. I made audio play by adding the audio attribute preload="auto" and all is fine now in IE9.

Modern browsers do not need this. Why IE9 does, I do not know yet.