I spend 90% of my time flying addon aircraft but decided to try one of the training flights - the VOR approach into Setac in the default 172. It's been so long I can't remember if I noticed this before, but the engine sound crackles and has a static sound when throttle settings are changed. It doesn't seem to happen with my Dreamfleet or Flight1 planes. All my connections are good as well as my sound performance otherwise. Any ideas?? Thanks Tom

I dont know if this will help but have you checked the sound-quality settings in FS9? Theres 3 settings: low, medium & high....:)

What kind of sound card do you have... on board chip or Soundblaster and what model and which drivers?All of these may have an impact... also, there is a Sound Acceleration setting in DXdiag that may help..Lastly, some folks have reported that changing the fps lock setting in FS9 has an effect on sound "crackling"..That should be enough to keep you wondering for a while :-)

Bert, Thanks for trying to help. I checked my sound card and it is a Creative Soundblaster Audigy Audio W/IEEE 1394 (firewire). The driver is 5.12.4.252. Everything else sounds great on my system. Regards, Tom

>Bert,> Thanks for trying to help. I checked my sound card and it>is a Creative Soundblaster Audigy Audio W/IEEE 1394>(firewire). The driver is 5.12.4.252. Everything else sounds>great on my system. > Regards,> TomI have that problem on my rig also with onboard sound,and same as yours--only when using FS9,CD's sound great.Doesn't seem to do it with most default aircraft but does with the Howard 500 which I fly most of the time. And..its not an everyday problem,it comes and goes usually when taxiing,moving the throttle up and down. I'm only going to have this mobo for another six months so I'll just live with it.David

I am also having the same problem with most of all of my engine sounds when I throttle up and down I get a lot of crackle. I have found so far that it has to do with the Panel cfg files. When I remove the whole panel file the sound is pure and free of all crackles. I have tried to remove one at a time gauges and I still can not find the problems. I can tell you this that it is not your computer hardware that is not the problems as I also tried it on my friends computer AMD 64 bit 2.4 ghz toledo dual core with the MSI Diamond mother board and all up to date drivers a $5000.00 system with dual SLI video cards and it sucks for the crackle is still there and just as anoying as my rig. I has something to do with the Fs9 sound.dll's they are designed crappy.