Fred Hersch, Mark Dresser and Bobby Previte alternate lush, dreamy landscapes and a swinging, straight-ahead jazz foundation in support of the saxophonist's adventures.   Her passionate interpretation provides insight into the goals Pollock had in mind when he created these works of art.   The quartet's emphasis remains focused on the theme of motion in art; hence, their program of chamber jazz eschews the tradition in favor of dreamier sequences.   The live electronics employed by the saxophonist apply to the motion of her column of air, and serve as an extension of her trademark right & left lobs.   With her live microphone controls, the saxophone's tone is tossed this way and that.   At times it's split harmonically or altered.   It's as if Jackson Pollock were directing the notes that fly from her horn.