At the very least they've definitely been run through a middle-man at some point. So what they've done is put a microphone in a library, grabbed whatever audio is on it, voice recognition'd it and then cleaned it up, and uploaded it to Twitter. And hidden it inside a lamp. shrug
Yeah. I love the idea/concept though.
They are not even using software for voice recognition. Instead, they are paying people pennies an hour to do it on Mturk.
They're using Mechanical Turk to transcribe the audio.