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Old January 24 2013, 05:18 PM   #22
YellowSubmarine
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Re: wild dolphin seeks out human help

I was thinking about the encoding, and not the range. There is more than one way to embed a meaningful thing in a sound. Some of the known ways to do so are impossible to interpret or detect without a common reference, but thankfully those are always artificial and not something you'd see evolving naturally. It could still be something pretty elusive, though.
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