Question / Help Stumbling sound in record

[simmers]

Hello, guys! There is a problem: when I capture gameplay (or just desktop), the sound "stumbles" for a moment periodically. I don't feel it when I play, everything is alright. But when I watch replay it's very noticeable.
Here is example http://www.youtube.com/watch?v=AAVuwOOW32w watch from 11:12
I use OBSM 0.12.3 now. I checked my old letsplays (which I recorded 1-2 months ago), recorded with old OBS, - no problem.

I used to ask about it and was given an advice to write mkv instead mp4 and set "audio buffering time" to 1500. Last time it helped, but now the problem came back.

 

[simmers]

Found a decision. That was because of sound card settings of frequency and obs settings were different. Screenshot demonstrates it. If somebody has the same problem, firstly try to change frequency. Another settings like container or audio buffering time not influence to sound lag (at least in my situation).