Did your phone always have the wine? Even stock? Some people have always had this.
I have not always had it, and I suspect many have been able to rid themselves of it inadvertently through some software patch. Here are some relevant links.
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<details the problem and links to the 893 solution
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<provides steps to flash .893
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<details the ICS update restoring the whine
One update is that after wiping, flashing, FDR, and reboot, the hiss/whine/squeal is a little quieter and barely detectable in the left ear (maybe that's my hearing) but definitely still present in the right. For those who've never experienced this I truly envy you but I know there is a software/firmware repair to this problem so I'll do whatever it takes to flash and test the way to a solution.
Also the XDA thread has another user reporting the audio whine using the 3/16 nightly.
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Edited by ReservedName, 17 March 2013 - 05:31 PM.