VLC no sound issue can often occurred not only when you play MKV files but also other file formats. Skipping and Lagging when playing HD MKV with VLC Problems when playing certain MKV files with VLC
You can have a test with the latest VLC 2.2.4, the plug-in had many changes. The reason is the plugin VLC uses to play MKV files is outdated and must be repaced with the current version if you want to play all MKV files. The VLC media player will play most MKV files, but will not play some.
VLC, the most powerful free multimedia player software, however, sometimes will fail to play some MKV files or not play properly play certain MKV files. MKV is an open-standard multimedia format that's widely supported by most software-based media players.
