On Mon, 11 Feb 2008 20:35:18 -0800, Darren New wrote:

> Jim Henderson wrote:
>> I'm trying to see how that would work in a sound file, though.
> 
> Futz with the analog before you encode it the first time. It's going to
> be more audible that one that wouldn't survive recodings, but if you
> want a watermark that survives being played out a speaker and
> re-recorded, that's what you need.
> 
> I don't know enough about the physics of it to know how to do it, but I
> know it's been done (and broken) multiple times.

Huh, I wouldn't have thought it could be done...too many variables..

Jim

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