https://bugs.winehq.org/show_bug.cgi?id=38313
--- Comment #3 from Yuki cute.dark.sorcerer@gmail.com --- so, just for completeness sake did I create a new WoW64 setup based on wine-1.7.33 to see if sound is bugged or not in any way. Apparently, sound works just fine.
Finally, I did another test using the patch, this time using my original prefix - no front/back sound whatsoever.
Last but not least, I find it very strange how wine is able to bypass .asoundrc settings. I created one which would mix channels together, but the outcome is always the same when starting skyrim.