“No it’s not,” cries a man in the audience, and for a moment, Sufjan Stevens is completely thrown off track. After a little audience dialogue, the artist’s previous assertion that this was his first time in Bristol does indeed unravel, a lapse attributed to “a lot of drugs.” The audience laugh along, and it’s a welcome note of levity on an evening dominated by Carrie & Lowell, Stevens’ seventh studio album and tribute to his late mother.