Good afternoon and thank you for posting on the Final Fantasy XIV Technical Support Forums.

To clarify, the audio desync comes from whatever you are watching on the second screen (Youtube, Twitch, etc.), and not Final Fantasy XIV, correct?

What kind of audio set up do you have? Do the monitors have their own speakers or are you using external speakers?

Has this always been an issue, or is it something that came up recently?

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!