Watch: Trailer And Interview With Sufjan Stevens For His New Film Project 'Round-Up'

"Serendipitous" is how Sufjan Stevens describes his introduction to the 100-year-old Oregon tradition known as the Pendleton Round-Up. Stevens collaborated with DPs Aaron and Alex Craig to film the round-up in 2013 and turn it into a five-minute short that he could share online. But after collecting 60 hours of footage, the Craig brothers told Stevens that their shortest edit was thirty minutes, and even that left good footage on the cutting room floor. After a year in production, the trio will debut “Round-Up,” an hour-and-fifteen-minute documentary/performance, at the Brooklyn Academy of Music, featuring Stevens on electronics and Yarn/Wire performing piano and percussion.

Today, the first trailer for “Round-Up” has arrived, and the trio answered some questions about the film.

How did you find the Pendleton Round-Up?
Sufjan Stevens: It was serendipitous. I was on a road trip and found it listed in a newspaper. I went for two days and felt like a voyeur or...