Yes, I'm using the latest graphics drivers.
Oops...I misspelled...it should have read "Dreamfleet".

I haven't re-isntalled this plane yet, because this problem happens with just about any plane - even before I installed the Piper - so I know this problem isn't caused specifically by this plane alone.
Here are things I have tried before this....
I've removed any add-on planes, removed add-on terrain mesh (I only had a few of those), and I've also completely un-installed fs2004 then re-installed it. None of this has worked yet. This really is baffling me, because for the first two months of use, this was never a problem. It just started one day, and ever since then, it's been like this. I don't know if this is a system wide problem, but I sure don't have any sound issues in any other program.
Sometimes, I open a flight and everything is fine the entire flight. Other times, I need to cycle the views once (while the plane is moving), and all is well for the rest of the flight. And yet at other times, there's nothing I can do to get rid of the static sound but end the flight, and start again (and hope for the best). It's definitely a "regular" probem, but certainly not consistent in terms of me being sure that it will happen every time.
This is really driving me nuts. I hope someone can help.
Thanks for trying!