I posted this question on another thread but apparently it is lost in another discussion. Has anyone else noticed that loud hum that is always present in the cockpit, and seems to pretty much drown out the noise of the engines? Is that some sort of recirculation fan? I have tried switching various things on and off ( Kinkos will have my printed manual ready tomorrow, so maybe there will be a clue in there as to what to switch off) but I can't seem to kill the sound at present. Any suggestion's.

Avionics. There's at least one thread on this at the official forum.Allcott

Look fs9 folder/sounds/Flight One ATR 72-500 and choose F1ATR_Exhaust.wav. MAKE A COPY to desktop. Open sound recorder,open copy on desktop, choose effects and decrease volumeto suit your taste. Rename F1ATR_exhaust.wav in folder and place your modified wav back in. Now background sounds will not be as loud.Can also mod others as you wish.

Also, if you happen to have a creative sound card, you might want to check your speaker settings and make sure they aren't messed up. For some reason, opening the ATR config editor cuases the settings to get changed. Mine were set for "headphones" and got switched to "5.1 surround", which of course sounds a bit off through phones...

>Look fs9 folder/sounds/Flight One ATR 72-500 and choose>F1ATR_Exhaust.wav. MAKE A COPY to desktop. Open sound>recorder,open copy on desktop, choose effects and decrease>volume>to suit your taste. Rename F1ATR_exhaust.wav in folder and>place your modified wav back in. Now background sounds will>not be as loud.>Can also mod others as you wish.>>That worked, thanks. Now that I know this trick, I am going to edit a few other sounds on FS :)Bob

FWIW, I use a product called Acoustica to edit FS sounds. For $29 US it's a pretty powerful sound file editor. A 30 day demo is available.