Music school dean David Gier and others demonstrate a new app for Apple Vision Pro that lets performers rehearse inside a realistic, immersive concert hall, complete with a simulated audience, so they can practice managing nerves before a concert. 1:30–3:30 p.m., Britton Recital Hall, 1100 Baits. Free. Preregistration requested at bit.ly/pianolabprodemo. (734) 764–0583.