When Afro Celt Sound System burst onto the music scene some 15 years ago their impact was so instant, so astounding, that it hit like a thunder crack. Here was a band unlike anything else, a band whose fusion of West African rhythms, Irish traditional music and cutting-edge dance grooves battered the senses and unleashed a wellspring of joy and liberation. Festival audiences did a double take then danced like dervishes. Albums flew off the shelves. There were awards. Grammy nominations. Star turns on big film soundtracks.

Afro Celt Sound System were the perfect storm: a phenomenon whose confluence of elements swept you away on a journey of light and shade, delicacy and power. When they added diverse new touches - Indian bhangra, Arabic influences, dub reggae, more - they did so seamlessly, in ways that only enhanced their sound and emphasised their openness. A super group whose line-up expanded and evolved around four core members (Simon Emmerson, James McNally, Iarla O'Lionaird, Martin Russell), the Afro Celt's pan-global sound redefined dance music and stumped music critics. They remain defiantly, enigmatically uncategorisable.

Catch them live at St David's Hall on May 29 tickets available online at www.stdavidshallcardiff.co.uk

or at the box office on 029 2087 8444.