How “noticeable”?
To achieve its multi-room synchronised play feature, Sonos creates a buffer, delaying the start of sound streaming my a small amount. When there’s nothing to register it against (ie it’s just music) it doesn’t matter and doesn’t show. When it’s a video source the lip sync goes out and can be very off-putting. This is minimised for their soundbars to be almost unnoticeable, though is still there.