Why doesn't my YI 4K Action Camera have sound? Please check if you muted the speakers Sound Settings: Go to "Back screen -> Settings -> System Settings -> Volume" to view or change sound settings. Related articles I can view the Live feed, but I couldn't hear any audio Why does the video recorded have no sound? How to reset your YI Home camera? When I playback my videos on the computer, What happened that the sound sometimes is lagged or no sound at all? And why I have trouble in playbacking the videos sometimes? (YI LITE Action Camera) I am concerned about security. Can I turn off the camera's microphone?