Spaces James Romig Tony Oliver, vibraphone Sawyer Editions   James Romig’s music has become more expansive. Spaces (2021) is his third recent piece to run over an hour in duration. Still (2016), a piece for pianist Ashlee Mack, was a finalist for the Pulitzer Prize. Last year brought The Complexity of Distance, a piece for metal guitarist Mike Scheidt that was both rigorously constructed and ripped uproariously.    Like all of Romig’s music, Spaces has a highly detailed plan. Each of the four sections of the piece has an “a” and a “b” subgroup. They begin with a collection of