Read more: How to fix VLC no sound issue step by step > And sometimes, you should check configuration settings if VLC is working without sound, say, enable speaker icon, unmute VLC, and enable audio in VLC audio settings. You can fix this by following the tips above. Reasons of this issue are similar to those of VLC not playing video.
Solution 2 to fix VLC not playing audio/VLC no sound problem. So, try to uninstall current VLC and reinstall the latest version, or download and install additional VLC codec packs. Such kind of issues may be result from outdated VLC version or video codec incompatibility.
Sometimes VLC can't play MKV, MP4 and videos movies downloaded online. This is the most common issue while running VLC.