Comedian Amy Schumer plays KeyArena — and her half-brother Jason Stein opens with an avant-garde jazz set.

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It’s been a great year for Amy Schumer, with Emmy and Peabody awards for her TV show “Inside Amy Schumer” and strong reviews and ticket sales for her raunchy yet romantic film, “Trainwreck,” as well as the tour that advanced it.

But if you’re going to her New Year’s Eve show at KeyArena, you probably know all that. What you may not know is that before Schumer starts skewering our cockeyed attitudes about women, you’re going to be listening to a set of avant-garde jazz by her bass-clarinet-playing half-brother Jason Stein and his trio, Locksmith Isidore.

Yep. A wonderful player on the Chicago scene who has an advanced arsenal of sound-production techniques — spits, honks, multiphonics, shrieks and microtonal mini-melodies (he can also swing with cool aplomb) — Stein has caused a bit of head-scratching on the tour. One writer in Chicago suggested the crowd waited politely for him to finish.

But if you like jazz, this will be a real plus for the evening, the kind of thing you would only hear in Seattle during the Earshot Jazz Festival.

Have fun out there!

8 p.m. Thursday, Dec. 31, at KeyArena, 305 Harrison St., Seattle; $146 (800-745-3000 or ticketmaster.com).