I haven't seen this posted here, but the problem I've been experiencing..

When FONV would run, it was great. But it seemed randomly..sometimes 5 minutes, sometimes 45 minutes after starting, it would crash to desktop, I'd get a rather obnoxious clicking sound through the speakers, and I'd have to reboot.

I'm using w7 64-bit with an Asus Xonar D1 sound card. I know it's not the shiniest sound card available, but it's one of the best for multiplatform use (I use linux for working).

I'll skip over everything I tried to troubleshoot and skip to the solution:

In the Xonar audio center, there's an option to enable/disable "GX". Turned it off, and I haven't crashed since. I believe it's similar to Eax, so..
check your sound card's control panel and disable advanced sound options (eax, gx, etc.)

Granted, I use a pair of rather high quality headphones, but I haven't noticed any difference in sound quality and haven't crashed once since
this change to my settings.

Hope it helps... somebody.

thank you, but that is pretty sad to expect users to disable the things they enjoy and pay for with their hardware or software.

Agreed.

However.. you can turn it off and play, if it helps.. or, you can keep crashing.

I have the same card, but after I disabled GX the sound quality went down drastically.
I will stick to the "save-often" scheme and live with the crashs, they are not that often.

GX is ASUS's emulator for Creative EAX. It's crashed on me in other games as well, I always disable it. Xonar D2X pci-e / Windows 7 64

FYI - ASUS Xonar sound card owners may want to check out the third party unified drivers -
http://brainbit.wordpress.com/2010/07/19/asus-xonar-unified-drivers/
I use them and they have worked for me rather well.