Aural archaeologists Rich and Steve Roach delve deep into the strata of the primordial mind in this acclaimed 1990 collaboration. They forge a symbiotic artistic alliance where their signature sonic motifs are generally abandoned for the sake of a collective sound. Implementing their combined arsenal of synths, samplers, flutes, drums, and steel guitar, the duo creates a variety of moods and atmospheres--serene ambiences ("The Grotto of Time Lost"), ritualistic, rhythmic invocations ("Fearless"), intense dark ambient spaces ("Magma"), and surreal, bubbling soundscapes ("Persistence of Memory [For Dali]"). As with their other works, the composers utilize a balanced blend of organic and electronic instrumentation in an exploration of the human psyche that is simultaneously primal and cerebral. This album was a critical and commercial success, remaining on the Billboard New Age charts for several months after its initial release. --Bryan Reesman