Composers’ imaginative new worlds of sound infuse MusicNOW concert with energy, flair

Review: This just in from Chicago Symphony’s new music series: Benedict Mason’s multimedia “Delta River” with odd-lot Far East film, Donnacha Dennehy’s “Stainless Staining” for pianos of special resonance, and Anders Hillborg’s “Vaporized Tivoli,” which hints at a circus gone bad. ★★★★