You can never step in the same river twice. And, unless you are blessed with an infinite amount of patience, time, and mortality, you can never see the same version of the Sundance documentary Eno twice.

This is by design. Brian Eno — former Roxy Music member, legendary recording producer, Berlin-era Bowie bestie, ambient music pioneer, and a man who rocked a Seventies kimono like no other — is not someone who likes dwelling on the past or being pinned down. The idea of a movie chronicling his 50-year career behind the keyboards and mixing boards,...