FSX sound and switching to a simconnect client application

Hi, I wonder wether it is possible to still receive sound from FSX when you run FSX in windowed mode and select a different window (f.e. client Simconnect application) on the desktop (I use a wide desktop with two monitors). If you do so, FSX will continue running, but without sound. I found no option within FSX that keeps the FSX sounds alive when you switch to another application. Is there any ? Guess I don't see something here ...Kind regardsrudolf