How to fix choppy sound replay with VLC?

I have a problem with VLC playing some file formats, for example MKV or M2TS (I didn't notice this problem with AVI though).

The sound plays okay, then disappears for a second or two, then re-appears. It occurs around once every 10 seconds. This is really annoying and prevents me from using VLC for those files, which, by the way, play completely okay in Media Player.

Here's what I already tried to do about it:

1. Change VLC sound output method.
2. Re-install K-Lite codec pack.
3. Re-install/upgrade VLC.

My configuration is:

1. Soundcard: Asus Xonar Essence.
2. Operating System: Windows 7.
3. Codecs: K-Lite.

What else could I try to fix this issue?

in VLC... Tools – Preferences - Select Input & Codecs option ... Look for "Skip the loop filter for H.264 decoding " or “Skip H.264 in-loop deblocking filter” and select ALL from the drop down list.

Save the preference and play the video.