This weekend I have bought via Simmarket on their black friday special the Sound application “Dolby Cockpit Sounds for FS2004“. I read about it in the mycockpits forum and was fascinated about it. I have searched a long time for such a sound addon. FSPS offers a 2 day free trial, so anyone can test this before buying.
And its fabulous. A game changer in you cockpit. It allows you to to play some cockpit sounds (spoiler winds, flaps winds, gear RPM, gear wind and Brakes) on your 5.1 or 7.1 dolby soundcard. So you will actually hear the spoiler wind sound coming from you back speakers.
Just check it out!