(Big Hit Music)Ending a hiatus that began in 2022, the septet recapture a distinctiveness that had been threatening to ebb awayThe general consensus seems to be that as BTS’s commercial stock has gone stratospheric – more than 500m units sold worldwide, including over 104bn streams, making them the bestselling Asian act of all time – the actual music has become more and more irrelevant. Before taking their hiatus in 2022 to fulfil their mandatory military service in South Korea, their saccharine, English-language bops such as Dynamite and Butter – while gargantuan global hits – had smothered the K-pop-specific idiosyncrasies that peppered their earlier material. By 2020’s double whammy of Map of the Soul: 7 and Be, the band’s early years as a hip-hop-focused collective were a distant memory, and thanks to a more westernised sound and studio cast list, so was their identity as a Korean act.On the eagerly anticipated Arirang – pointedly named after a Korean folk song dating back to 1896,...