Hello, this is KMPlayer team.
KMPlayer doesn’t support some of the audio codecs.
If you want to use this codec, please purchase the codec.
In the 18.104.22.168 version, after you have installed the codec, when you re-run the KMPlayer, will be applied codec immediately without a different setting.
In version 22.214.171.124 or earlier version requires an external audio codec settings of KMPlayer settings.
How to set external audio codec in version 126.96.36.199 or earlier version
1) Preferences(F2) → Filter Control → Decoder Usage → Internal Audio Decoder
→ check “ALL Disable”.
2) External Audio Decoder → click “External Decoder Search”.
3) Add your purchased codec by clicking “Add External Codec”.
** KMPlayer supports Dolby codec(AC3/E-AC3) in Window8
Enjoy your video with KMPlayer.