Harmony in Ultraviolet

Bookended by two tracks, the harmonious "Blood Rainbow" and its dissonant doppelganger, "Rainbow Blood," the Canadian ambient electronica artist Tim Hecker's sixth album is a study in textures, with the smooth serial patterns of "Chimeras" gliding by like stately digital swans on a river of ambient sound, ominous static-driven pulses slowly gathering in "Dungeoneering," and questing sonic vapor trails soaring across the cathedral-like spaces of "Radio Spiricom."