In May, my Reader colleague Leor Galil took a long look at the surfeit of summer music festivals in Chicago. As he subsequently tweeted, folks here are often so eager for a reason to get outdoors when the weather’s warm that it seems like they’ll accept almost anything: “People want to be outside at an event, does it really matter what you put in front of them?”

Circuit des Yeux Sat 7/21, 4-4:45 PM, Blue Stage

Joshua Abrams & Natural Information Society Fri 7/20, 3:20-4:10 PM, Red Stage

Irreversible Entanglements Sun 7/22, 1:45-2:25 PM, Red Stage

This Is Not This Heat Sat 7/21, 6:30-7:15 PM, Blue Stage

In its early years, Pitchfork even offered a sprinkling of acts well outside that territory, venturing into free jazz and so-called world music. In 2006 and 2007 the lineup included such gloriously daring improvising artists as 8 Bold Souls, Chicago Underground Duo, the Jeff Parker/Nels Cline Quartet, Tyondai Braxton, Craig Taborn’s Junk Magic, Fred Lonberg-Holm’s Lightbox Orchestra, Ken Vandermark’s Powerhouse Sound, and the William Parker Quartet. At the 2008 festival, A Hawk and a Hacksaw, Boban & Marko Markovic, and Extra Golden shared traditional sounds from three continents.

Irreversible Entanglements by Irreversible Entanglements