There's not a whole log of information in your post or your log.
Can you explain a little clearer what you mean?
What video player are you checking the recordings in?
Have you validated all your device drivers (USB, sound card, etc.) that might be affecting audio are fully up to date?
Try getting a clean log file from OBS that shows a sample recording, and if possible, provide that recording to us for examination.
To make a clean log file, first restart OBS, then start your stream/recording for ~30 seconds and stop it again. Make sure you replicate any issues as best you can, which means having any games/apps open and captured, etc. When you're done select Help > Log Files > Upload Current Log File. Copy the URL and paste it here.