Seven years since they last released an album, Desert Hearts return, vision undimmed and armed with a magnificent new record. And, as Francis Jones discovers, the passing of time has not tamed them. I’m sitting downstairs in Voodoo bar in Belfast awaiting the arrival of Desert Hearts. I’m here to interview them about their new album, Enturbulation=No Challenge. The last – and only previous – time I interviewed this band was back in 2006, around the release of their second album, Hotsy Totsy Nagasaki. My memories of that evening are not altogether pleasant. Drummer Chris Heaney had recently departed the…