[hortonew]

I think the author had a little over-the-top reaction of "it’s time to unplug everything, chuck my phone, don a tinfoil hat, and move to the woods." The buzzing and computer-created audio was immediately noticed. I also consider myself very good at noticing sound differences, but I think that's beside the point in this case.

[brlewis]

It isn't hard for them to hold onto the training audio to use with later versions of the AI.

Assuming, of course, that the buzzing and other flaws weren't added to lull you into a false sense of security.