For longtime public radio aficionados, one man’s laid-back voice and gently satiric humor are the instantly recognizable symbols of NPR entertainment. Of course, I’m talking about Garrison Keillor, who brings his tender timbre and wry wit to Oxford for Miami University’s Bicentennial Celebration on Wednesday. The Prairie Home Companion host and bestselling author will appear as a solo act, and the intimate setting will have him sharing Midwestern lore, wise observations on getting older and the news from Lake Wobegone directly with the audience. And there’s little doubt that the ever-musical Keillor will regale the crowd a couple songs. Don’t miss this opportunity to see one of the few, true-blue radio-show icons in his element, still vital and entertaining as ever. 7:30 p.m. in Millet Hall on Miami University’s campus. $40. Get details and buy tickets here.