The inaugural instrumental quartet, that included Yo-Yo Ma and Itzhak Perlman, was faked. They were “hand-synching” to canned music.
This is unsurprising: I was shocked they were in such good tune at 27° F. In my marching band days, my euphonium went way sharp in cold weather.
Per Carole Florman, spokeswoman for the Joint Congressional Committee on Inaugural Ceremonies:
I think this is a whole lot of nothin’. These are world-class performers who are playing in 19 degree weather [editor: NOAA said 27 degrees at that time] and the technical requirements of their instruments made it impossible for them to have their music amplified and know that it would be in tune. So they made, what I think, was probably a difficult decision to play to tape. (source)
Oh, come on. Nothing suggested it wasn’t real. You shouldn’t have waited several days to reveal this.