CSO’s ‘French Reveries and Passions’: Spirit and imagination set crown on a dream festival

Festival Review: It’s that time of the year when orchestras change their pace, kick back a bit and come a-bloom with new ideas in the spirit of the warming clime. Thus the New York Philharmonic celebrates its 50th season of Concerts in the Parks, the Cincinnati Symphony’s May Festival gets underway, the Boston Symphony is deep into its Pops concerts. But the place to be this season is in the Windy City, where the Chicago Symphony Orchestra is midway through an extravagant multidimensional festival “French Reveries & Passions.”