Audra McDonald makes her first Hobby Center appearance with an intimate concert spanning Broadway, the Great American Songbook, and music beyond both traditions. The record-setting Tony winner is equally at home delivering crystalline soprano lines, exposing the quiet center of a lyric, or letting sharp humor loosen the room between songs. Houston-born music director Andy Einhorn joins her at the piano, adding a hometown thread to a rare one-night performance built around voice,…