The folk revival of the indie scene seems to find its basis in an interesting ideal: the continuing search for beauty in little moments. Though it's difficult to avoid the perception of artifice - perhaps rightly so - in hipsters reprising a genre that more or less defines itself as the purest artistic expression of one dirt-poor troubadour and his busted-up guitar, this is ultimately how we separate the wheat from the chaff. All artifice aside, it still is a genre of paramount humanism. With no fancy effects to hide behind, it's awfully easy to spot a charlatan. I don't believe that Greylag are charlatans. A four-piece from Portland, the band makes music that wisely avoids any attempt to replicate traditional folk chestnuts, instead focusing efforts on creating a warm ambience of airy harmonies, gentle guitars and distantly chugging drums. Were it not for the insistent momentum that the drums provide, one might worry for a Greylag song evaporating into the atmosphere. 

[Northern, with Liz Janes, Tattered Dress 8 p.m., $6, 321 Fourth Ave., Olympia, northernolympia.org]