Sufficiently admired in the UK that they were able to pack out London's Royal Albert Hall in April 2010, Opeth have long been a potent antidote to the notion that prog rock and metal are genres bereft of substance. The Swedes' 10th album, Heritage, is a brave, melancholic and often beautiful heavy rock record that revels in the warm, analogue tones and shimmering mellotrons of the pre-punk 70s while still exuding a sense of wonder at new ideas. Band leader Mikael Åkerfeldt has confessed to a peevish rejection of the modern metal scene, but there is still plenty of rugged oomph amid the labyrinthine riffing of The Devil's Orchard and the Rainbow-like clatter of Slither. Although proudly mired in indulgence – Famine is a bewildering squall of crescendos, calms and rasping flutes; Folklore ends with an outrageous Gilmouresque guitar solo – this is both tasteful and timeless enough to lure in the prog-averse, too.