I've been patiently waiting for an update that fixes this but there still hasn't been anything that fixes this. Reverting to older versions does nothing anymore. When 3.33 came out, I was able to revert to 3.32 and surround came back but since 3.34 came out, reverting does nothing. I am on Windows 8.1 and I've had these headphones for about a year now with no issues prior.