Marco Martini of Perfect Flight 2000 in Italy has released Sound Environment X on simMarket. According to mr. Martini the program “…… adds more realistic engine and surrounding sounds in your flight simulation experience by changing and improving all default FSX and Acceleration pack sounds…..”.
“…… By default, sounds in Flight Simulator X comes registered by Microsoft at 22,050 kHz using only one channel (MONO). Sound Environment X converts all sounds using two channels (STEREO) at 44,100 kHz. The result is a more accurate effect for every sound available in Flight Simulator X and Flight Simulator X Acceleration Pack……”.
Available here from simMarket.