Can a trippy VR film bring classical music to a new generation?

Venezuelan conductor Gustavo Dudamel opens virtual reality film Symphony in Madrid

The two huge white trailers that sit between the Royal Palace and the Royal theatre in central Madrid form an unlikely pair of portals to a universe of boundless visual and aural possibility.

But step out of the December drizzle and in through their doors and you will find yourself crawling inside a violin, sitting in an orchestra before one of the most famous conductors in the world and bathed in a stream of lysergic images, all to the strains of Beethoven, Mahler and Leonard Bernstein.