But I believe this was the layer change, and only occurs for a second. It's THX approved as well. The mix is very nice, and it is needed. The chirps of the birds, the crashes, the various noises, without a good mix it's hard to watch the movie. But thankfully, it is a nice sound mix.
Dialogue is clear too, and things are loud and ear-crackling.
But for some reason, something feels missing in this mix, but I can't put my finger on it. The mix is Dolby Digital 5.0 in English, as well as French and Spanish. It just describes the whole movie, so, if you can't see, this helps you imagine the movie quite a bit more. While this disc does not cover so much new ground, because the whole layout is basically like the great A Bug's Life Collector's Edition. A very good majority of the features is about the whole making of the movie, all the process and techniques involved.