The Famous Fingers Were Live, but Their Sound Was Recorded at the Inauguration - NYTimes.com: "“It’s not something we would announce, but it’s not something we would try to hide,” Ms. Florman said. “Frankly, it would never have occurred to me to announce it. The fact they were forced to perform to tape because of the weather did not seem relevant, nor would we want to draw attention away from what we believed the news is, that we were having a peaceful transition of power from one administration to the next.”"
But of course! So much for transparency.