This might seem an odd thing, but when I have airport ambience enabled, a minute or so after I start taxiing I get a high-pitched 'screaming' sound start up - actually two sounds which slightly phase with each other (which makes it even worse). It is very loud - I can't imagine what it is supposed to be. It sounds rather like the sort of 'screeching' sound you get when a train slowly pulls into a terminus, the wheels scraping along the rails as it turns corners.
I am assuming it comes from FDC, as I never heard it before I installed the programme this week. Well, I turned off airport ambience for my last flight and it didn't happen, but maybe someone recognises what I am talking about - I could then remove the wave file (or replace it with a silent dummy wav file). I haven't located a 'culprit' though playing through the ambience files one by one....
Thanks,
Martin