I have the same problem, I tried every solutions you mentioned but non worked. Now I'm using Media Player Classic without any audio problem, but I would like to use VLC again
I have the same problem, but I'm on Windows 7 Ultimate 64 bit. Every 8-10 seconds the sound on a video goes on mute for at least half a second. I tried to turn off the Asus EPU energy manager, but the problem is still here. What can I do?