Taka Kigawa participated and performed Erik Satie's "Vexations" for about 60 minutes in total. Twenty pianists played, and the whole concert lasted about 19 hours. Here's the thoughtful and detailed report by Joshua Barone, who stayed for the entire concert, on The New York Times.
September 30, 2017
What It’s Like to Hear the Same Piece of Music for 19 Hours