I have a SB Audigy 2 sound card and I'm having trouble with a number of engine sounds in FS9. I tend to get a hissing in the higher frequencies with some planes that's become really annoying. I've run the diagnostic software that came with the sound card and have double checked the wiring of my 5.1 speakers. There appears to be no problems there. As a few examples, in MAAM's B-25 the external sound is fine, but at take off and cruise speeds the internal hissing sound is quite bad. The internal sound of the Real Air Decathalon has noticable hissing as do a numnber of other planes. I'm starting to consider deleting FS9, but before I do, I thought I might try to find some sound editor and and try to remove the hissing in each sound file. Can anyone suggest a sound editor that could take the hissing out of wav files?Any other possible solutions?Thanks

Could this be wind rush noise, I wonder? Have you tried adjusting the level of cockpit sound from within FS2004 or maybe the wind noise levels within the sound.cfg file?David

Have you updarted the sound card drivers lately? I think I recall that one of the Creative updates was to deal with this issue.Allcott

Thanks for the replies. I have the latest drivers for the Audigy 2 ZS which are dated 11-19-03. I also tried to mute every sound but the engines and still had the hissing. Next I muted the engine sounds and left all the others on and the hissing went away. So I think it does have to do with the wav files for some of the aircraft engines. The only other thing that seems odd is that every so often I hear what sounds like a pulsing volume sound. The sounds play but it seems like they get louder then return to normal. I'm wondering if it's possible that my Creative 5.1 speakers are to blame. I don't know if that's a real possibility or not.

Well, the easiest way to eliminate your speakers is to plug in a pair of headphones and see what happens????David

You can try a few things: Lower the windows volume via the control panel->Sounds and Audio devices, then use volume control on the 5.1's. Hissing is generally due to but not limited to; feedback from another source, dirty connections and/or excessive volume setting within S&A devices.Gently twist the plugs within their sockets on the sound card and speakers and notice if you get any static, if so clean the connections with a dry cloth or good "Electrical Cleaner", NOT WATER LOL.