Pablo Casals' White House concert
Before the boards shut down, I wanted to share these two Youtube.com videos with you. The first one is the complete performance of Pablo Casals at the White House on November 13, 1961.
The second one is of the final part of the concert, the piece heard in the film.
https://www.youtube.com/watch?v=n9WkhhFNTEE
https://www.youtube.com/watch?v=qKoX01170l0
(The second video lists him as "Pau Casals".)
I hope you'll enjoy it. The videos are not mine, I found them after I went looking for the artist and a recording. Frankly, I was surprised to learn it was not just recorded in its entirety, but released for sale too.