The secret to instrumental rock music is to show such disregard for conventional song structures that the listener doesn't even expect to hear vocals. The second album from Danish quintet Diefenbach, however, often gives the impression that the singer simply got lost en route to the studio. Their rippling neo-psychedelia and brawny rhythms are impressive: Windmills is wonderful acid-casualty pastoral, midway between Four Tet and David Crosby. Yet the band, who take their name from a minor character in the Coen brothers' film Fargo, only come into focus when they open their mouths. Make Your Mind, the towering highlight, suggests a more benign My Bloody Valentine: a starry-eyed mantra swept up in an obliterating whoosh of guitar.

Apparently, Diefenbach's debut, which was never released in the UK, was entirely instrumental while their next record will be mostly song-based. No wonder Run Trip Fall, glinting with promise though it is, sounds more like a stepping stone than the finished item.