lags sound, what to do? (Batman: Arkham Origins)

SEK1R
In my opinion, the Latencymon utility should show what the plug is.
still dig into the realtek audio driver, slap more hertz.
And since there's nothing else here, I'll add that the death of a sound system is a common thing in motherboards, on a par with a network adapter (old motherboards). In general, look at the English reddit if you think that the problem is in the game specifically.