A new lineup veered uneasily between the exquisite and the pleasantly soporific, writes Robin Denselow. Vancouver-based trio the Be Good Tanyas specialise in matching delicate harmony vocals with acoustic guitars and banjo, and in reworking anything from gospel and blues to old rock classics and their own material. Their formula involves classy musicianship and a freewheeling approach to the songs, and it has brought them deserved success. It was no surprise the Chapel was packed. But on this showing, they veered uneasily between the exquisite and the pleasantly soporific.