Progressive bluegrass is a fancy notion for a genre that prides itself on playing like the preceding generation (or the one before that), but this Arizona quintet balance convention and innovation with some style. Their crying fiddles, mandolin and two sets of sibling harmonies are all firmly in country tradition, while a cello lends numbers like A Dream in the Night a classical flavour, and the stately Sunday for Larks is pure string quartet. The mood is more chapel than saloon bar, and the gospel flavours pay off on a closing trilogy that ends with the lament Far From My Home. Poised, if a little bloodless.