Music lags on client when connected to server

Hello,

I have a small issue:

I have a server / client system.On my client, I am playing some music and it works fine. However, as soon as I connect to the server, I experience small freezes in the music, which occur every 3s and last less than half a second.

There is no overload of information sent from the server as my game is empty for the moment, and the fps rate never drops below 60.

Any idea where it could come from ?

Thanks