This reminded me of something I read just last night -- Duke Ellington playing with Leopold Stokowski in the audience.
See here (pp. 93-94): https://books.google.com/books?id=5ponZR7emQMC&pg=PA93&lpg=PA93&dq=duke+ellington,+leopold+stokowski&source=bl&ots=QYhVcPhw4T&sig=aa-dBcj-3lkWC0zlyMe4hzGwxVA&hl=en&sa=X&ved=0ahUKEwjX9br03NjPAhXGslQKHU7qBIsQ6AEISTAM#v=onepage&q=duke ellington%2C leopold stokowski&f=false
And, of course, there's the oft repeated story about Sidney Bechet playing for Ernest Ansermet.
See here (pp. 38-39): https://books.google.com/books?id=TzQukIOsbvEC&pg=PA39&lpg=PA39&dq=sidney+bechet,+ernest+ansermet&source=bl&ots=-UflBrAszr&sig=fFMTnvcB5yEaCMH5F9mZ7fkkg-Q&hl=en&sa=X&ved=0ahUKEwjc9MzW3djPAhUoh1QKHYdoC0oQ6AEIVjAM#v=onepage&q=sidney bechet%2C ernest ansermet&f=false