Fading engine sounds with altitude

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Hello everyone,

I recently noticed that the PMDG 747 v3 has it and the FSLabs A320 has it as well: fading engine sounds with altitude, sounding extremely close to the real thing. This was a feature where a few years ago people were telling us it will never be possible due to FSX sound limitations. It was actually something that bothered me to this day when soundpacks make me hear the hum of the engine fans at FL350 throughout cruise, because anyone who ever flew for real knows its not that way.

So, since both planes still use the FSX sound.cfg for their engine sounds, I wonder how they were doing this. Is this some hard-coded classified developer secret or a parameter in some file that would make it possible to add that function to other planes as well myself? I would love it on the PMDG 777 for example. ;)

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It's always been possible. It's just a question of balancing the various sounds in the cfg. file. It's time consuming to do so that's why some developers have never bothered.

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