FWIW I don’t dismiss this claim–but I don’t think there’s enough of a claim yet (at least from what I’ve seen in this thread) to evaluate. A journalist says that unnamed sources cast doubt on audio just isn’t specific enough to consider. I trust he’ll be bringing those specifics in a full story, with interviews with multiple experts who go on the record to explain their conclusions; when he does so, that’s when I’ll try to figure out if the claim makes sense.