To see the music director of the Boston Symphony Orchestra performing as a soloist under the baton of a Boston Pops conductor? That was unprecedented in the orchestra’s entire performance history.
“Conducting to a film that has already been made is a really big challenge. It’s really one of the toughest things that I’ve had to do as a conductor.”
--- Keith Lockhart, musical director of the Boston Pops
When the on-air portion of “A Prairie Home Companion” ended at 8 p.m. on Saturday, Keillor, band, and guest singers immediately launched into a record-breaking 1.5-hour encore performance.