Swingin’ sounds will dominate downtown this weekend. The 32nd Chicago Jazz Festival kicks off today and so Eight Forty-Eight is all that jazz. Think of it as a mini-tour to many of the jazz happenings you can drop in on this weekend. From the Cultural Center to the Pritzker to the Petrillo - fans will have plenty of artists and styles to choose from. WBEZ’s Richard Steele will be hopping between the stages, trying to absorb as much as possible. He offers a preview of what he’s looking forward to hearing.