Instead of Górecki, the deathly cloud formations of Alban Berg come to mind during the song's interludes. But Björk is no naive Lulu she uses such a scene to try out some primal vocal and back-stretching calisthenics.
Such signs of life are a step in the right direction, away from the nadir of 2004's Medúlla (Elektra), which was doomed from its conception as an all-vocal album. Björk has a tendency to overestimate her singing range, as any Ella Fitzgerald fan who has heard the Icelandic one try to get through "Like Someone in Love" on sheer winking cuteness can attest to. Fortunately, this same belief in her power has made for some thrilling songs. Volta only has a couple, but a couple are better than none. *
With Joanna Newsom and Ghost Digital
Sat/19, 7:30 p.m., $26.50$70.50
1 Amphitheatre Pkwy., Mountain View