"Madison's north side - home of the Muskies and the Cherokee Country Club - isn't known as a center of avant-garde art," contributor Dean Robbins writes in the City Notes section. But that will change Sunday afternoon, when Madison's own Roscoe Mitchell brings his Double Rhythm Section to the Northgate Mall's Sapphire Ballroom, making it "instantly...an important musical venue." Mitchell, writes Robbins, is on the cutting edge of modern jazz, and the sax virtuoso will record the concert for possible inclusion on his next album. Mitchell says the gig "takes me back to the '60s in Chicago, when there were regular Sunday afternoon concerts in places like the Lake Meadows housing projects. I thought it was a shame there aren't more things like that going on now." Mitchell is now Distinguished Milhaud Professor of Music at Mills College in Oakland, Calif. Robbins is now editor of Isthmus.