Remember the old museum audio tours? The big clunky tape recorder slung over your shoulder, telling you to visit the artwork in a strict sequential order? Times have changed. Today’s audio equipment is elegant, like handheld wands with no cords to get tangled up in. And because it’s digital, you can skip around easily. But for lots of art lovers, that’s not enough. The MP3 age is shaking up the form and content of museum tours, and we sent Aimee Rinehart to find out how.