John Cale and the anger behind Velvet Underground

Stephen Sackur talks to John Cale, a founding member of the Velvet Underground, and a solo artist and producer.

In the checkered history of rock and roll, there have been relatively few artists who have managed to create a genuinely new, even revolutionary, sound.

The Velvet Underground achieved just that in mid-sixties New York - combining youthful anger, musical creativity, with an avant-garde art sensibility.

John Cale acknowlwges that many of the songs wre based around protest writing - so where did the anger come from.