[Sam's Army]

"In the first ones I heard the woman's voice sounded stilted, like a badly read script."

I have wondered that as well. Also, her voice comes across more clear, as if she isn't on a phone line but he is.

Perhaps it is easily explainable by whatever equipment she was using to record the call, that it may "shield" her voice from sounding like a phone conversation, but it seems a strange effect if so.

[stylecouncilor]

I think she’s holding a mic up to the phone-that’s why she is so clear. But I’m no expert.