Of course I need to have this div somewhere on the page:
$('#sound_element').html("<embed src='scripts/"+file+".mp3' hidden='true' autostart='true' loop='false'>");
And it does the magic. I found that it plays flawlessly in Chrome, but for Firefox it asks for Quicktime plugin. But I need it for managed environment, so it is not a big deal.
Finally, I can add some tunes to my blog! ;)