During "Mother"'s angry speech to Norman, while Janet Leigh is trying to hide the money in her room, the audio gets very low when Leigh opens the window to listen. You would think the audio level would get louder when she opens the window. As it is, you can barely make out Mother's words. The French track does not have this problem. Can someone who is familiar with Psycho explain if this is a mastering error? Or is this the way it has always sounded. Thanks!