Accept header for embed/audio tag

~~~embed mp3~~~

==== GC ====
/_test_/public/test2.php
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1626.5 Safari/537.36
text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
--------------------------------------------------------------

==== Fx ====
/_test_/public/test2.php
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:21.0) Gecko/20100101 Firefox/21.0
text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
--------------------------------------------------------------

==== IE (one page load...) ====
/_test_/public/test2.php
contype
*/*
--------------------------------------------------------------
/_test_/public/test2.php
contype
*/*
--------------------------------------------------------------
/_test_/public/test2.php
Windows-Media-Player/12.0.7601.17514
*/*
--------------------------------------------------------------
/_test_/public/test2.php
NSPlayer/12.00.7601.17514 WMFSDK/12.00.7601.17514
*/*
--------------------------------------------------------------





~~~audio mp3~~~

/_test_/public/test2.php
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1626.5 Safari/537.36
*/*
--------------------------------------------------------------
/_test_/public/test2.php
Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)
*/*
--------------------------------------------------------------
/_test_/public/test2.php
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:21.0) Gecko/20100101 Firefox/21.0
audio/webm,audio/ogg,audio/wav,audio/*;q=0.9,application/ogg;q=0.7,video/*;q=0.6,*/*;q=0.5
--------------------------------------------------------------