The key to “Eno” comes near the beginning of the film — at least, the beginning of the first version I saw. The musician Brian Eno, the documentary’s subject, notes that the fun of the kind of art he makes is that it’s a two-way street. Most movies are made up of juxtapositions of scenes, carefully selected and designed by the editor. But “Eno,” directed by Gary Hustwit, turns that convention on its head. He agreed to participate in “Eno” only if it, too, could be an example of what he and others have long called generative art.

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Persons: “ Eno ”, Brian Eno, ”, “ Eno, Gary Hustwit, Eno