Post-rock, as a genre, has always been difficult to define or explain. Yet, for Portland-born Grails — whose members now live in three different cities on two different continents — definitions and descriptions grow even more complicated as the years pass. Ostensibly a post-rock band by default of their catalog of instrumental music played in the rock idiom, Grails have long existed in the narrow overlap between psychedelic rock and film scores, with elements of ambient, trip-hop and metal. The music that Grails make is complicated and nuanced — not the kind of sound that one files away under one label so easily.

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