Hauschka on his improvisational Bristol Proms set

Ahead of his performance at the inaugural Bristol Proms, Volker Bertelmann (otherwise known as Hauschka) spoke to Classic FM's Jane Jones about the peculiar nature of his concert.

As he explains, his own unique brand of prepared piano technique (which has its roots in the work of John Cage) and some experimental improvisation form the backbone of his work, but that's not all it is - he'll also be collaborating with visual artist Rod Maclachlan, who's created a special robot to go inside the piano especially for the concert.

"The idea is to create sound and pictures, only inside of the piano - and there is nothing else that you can see."