I got a glitched version of the DVD where when I play the commentary it comes out garbled. It was amusing though since Chris already has a soft voice so it wasn't unpleasant to listen to, just amusing :modesty:

i play the memento commentary´s when i go to sleep because he has a soft voice :modesty: :modesty:

I've listened to about 80% of the Memento commentary and it sounds perfectly fine to me. I suppose he does have sort of a soft voice, but it is still quite a bit louder than the movie playing underneath.