Interesting and completely pointless. I've heard other audio "experts" analyze the tapes and come up with the opposite conclusion, or no conclusion at all. Evidently even with augmentation it's one of those tapes that each listener hears what they want from.
In other news, NBC has announced they are undergoing Operation Scapegoat to try and convince the public that they're unbiased and totally not liars when they presented a version of the 911 tapes that they heavily and purposefully edited to make it seem like Zimmerman was a racist who was racially profiling Martin---until they got caught with their fingers on the race-baiting switch. Now, they intend to find some preferably lower ranking employee, or maybe the piece's producer to pin the blame on so they can show that they as a network had NOTHING to do with such a clumsy attempt.
I'm kind of surprised networks and other news agencies keep doing things like this. Do they think that no one will check in the age of internet bloggers and news agencies? It's sort of like that Rutgers thing where they came out and said that one kid taped the other having gay sex and put it on the internet, after holding viewing parties, none of which he did.
Or the media in the Duke lacrosse rape case which turned out to be fabricated.