While flying the 747-400, I occasionally get a continuous loud squeal from the speakers that may last a minute or so. This particularly happens when I change views in 2D to an outside view or to tower or spot view. Can anyone help with this?Also, I recently installed the new sound file update for the 747 in the hope that this would stop the squealing but there's been no change. I noticed in the install notes for the sound update, that if you intend to uninstall 747-400 you have to uninstall the sound update first. How do you do this?Thanks in advance.Guy

Guy,This sounds like a driver issue to me - make sure you have the latest sound drivers for whatever card/on-board chip you have and also make sure you're running the latest DirectX runtime files from MS.