If live shows reveal the mind of a performer, Julian Koster’s inner life takes place in a veritable magic kingdom. He’s on the road as Music Tapes with a show called “The Traveling Imaginary,” featuring an actual circus tent and some strange instrumentation crafted for the occasion. And of course, the Tapes’ dreamy weird music puts one in mind of Willy Wonka if he had a fascination with accordions and banjos rather than chocolate bars. Music Tapes plays three Triangle shows this week – two at Carrboro’s Cat’s Cradle ( catscradle.com) Monday, and one on Tuesday at Durham’s Duke Coffeehouse ( dukecoffeehouse.org). Tickets are $12 at the Cradle, $5 at Duke Coffeehouse (free with Duke ID).