I checked the analog 2ch outputs on Planet Earth in the sections I mentioned above and still hear the stuttering. They are both in chapter 3 of "Shallow Seas".
First instance is from 22:11 to 22:30. This is the more subtle of the two, I can't tell if its a very deliberate vibrato or an audio problem. To me it sounds just a little too harsh to be intentional.
Second instance is from 23:23 to 23:39. This one is pretty bad and very obvious.
I've noticed this same issue in at least one other episode (on a separate disc) so I'm guessing there are instances of this in several places. I really hope this is just some kind of firmware issue, but I'm hoping someone else can confirm they also hear what I do.
First instance is from 22:11 to 22:30. This is the more subtle of the two, I can't tell if its a very deliberate vibrato or an audio problem. To me it sounds just a little too harsh to be intentional.
Second instance is from 23:23 to 23:39. This one is pretty bad and very obvious.
I've noticed this same issue in at least one other episode (on a separate disc) so I'm guessing there are instances of this in several places. I really hope this is just some kind of firmware issue, but I'm hoping someone else can confirm they also hear what I do.