Subscribe to BBC News null There are few more Spanish sounds than the "click" of a pair of castanets. Their rhythm is the bedrock of flamenco. Few know the complexity and craftsmanship involved with castanets better than Juan Vela. He started in the business at the age of seven and is the fourth generation of his family to practise the trade. Now, with more than 50 years experience, Juan is almost unique in making castanets in the traditional way. BBC News visited Juan at his studio in Seville to find out more about the art behind this captivating sound. Producer: Carolina Valladares Subscribe to BBC News HERE http://bit.ly/1rbfUog Check out our website: http://www.bbc.com/news Facebook: http://www.facebook.com/bbcworldnews Twitter: http://www.twitter.com/bbcworld Instagram: http://instagram.com/bbcnews