Speaking of Madison’s Central Library, if you happen to be on the third floor of the new building, don’t be alarmed if you hear quiet, invisible voices whispering softly in your ear. The building’s too new to be haunted, after all. No, you’re more likely to have just encountered Meg Mitchell’s latest installation art project, on display at the library through February. It’s part of a joint exhibition with Mitchell, Milwaukee multimedia artist Nathaniel Stern (whom we’ve interviewed before on the Buzz), Kemper Smith and Bryan Cera. Meg Mitchell joined the Buzz on Monday, January 27 to tell us more about it.