Jazz@Penylan Festival, Cardiff⭑⭑⭑⭑⭑LIVE rock and pop events often happen in huge indoor venues, outdoor stadiums and fields of many acres, but the history of myths and legends in jazz is very different. The whispered religion of sacred performances never to be repeated or just occasionally captured on a recording are the cache of jazz aficionados.Cardiff, very recently, has been busy reframing itself as a “music city,” home to huge rock and pop “events.” But is the “music city” good for local music?