Dolby encoding: 2 sec of silence at start?

I have a movie that starts out with the sound of wind gradually fading in. I encoded a Dolby file but a few seconds of my wind sounds got completely cut out. I heard thru the grapevine that you need to have 2 seconds of silence to start your sound so that Dolby encoders can use that as a reference point. ??? Or should I have a loud sound begin the program - example: a voice saying, "And now our feature presentation"?

As far as I know - using Compressor with AC3, just takes in what you give it and puts out the Dolby compressed equivalent.

silence is good, but i think (please test and report back!) you can start your DVD with two seconds of black video with AC-3 sound, as long as all sound on the disc is AC-3
(the decoder has to switch.)
Always a good idea, since the specs state first play has to be a video stream.
I do this always, but just to be safe. Over here (Pal land) i never had the problem...

Bouke