Is it possible for special scenery objects to act as a trigger to play a sound in FS9?If so, could a plug-in be created to play the sounds of AI aircraft landing and taking off? These 'objects' could be rendered invisible and placed anywhere on the runway or, perhaps, at a certain AI spotting location. I believe MS Train Simulator uses this method to play various sounds - eg - birds, cars, running water etc. Perhaps certain 'flags' in the aircraft.cfg file could trigger certain engine sounds - eg, piston, turbine, jet. I am an absolute AI fanatic - so this idea appeals to me - alas - I don't have the skills to create it myself. I know about FSHotSeat - but I like the idea of user placed triggers. Anyway, just a thought!! Hope this stirs some skilled technicians!!!!CheersJont

Try posting in the scenery design forum. You might have more luck there.Good Luck, Adam