Human chemistry is indeed a mercurial thing. And adding any artistic endeavor into that mysterious balance can, every so often, create some true magic. For Dave McGraw and Mandy Fer (pronounced fair), the delicate intertwining of music, life and that always-fine interpersonal equilibrium has borne fruit in the shape of a truly one of a kind artistic partnership.With the release of the songwriters’ first official collaboration, Seed of a Pine, the duo’s striking ability to blend their lush folk and Americana-influenced styles is on full display. McGraw’s consoling, velvety baritone voice, reminiscent of Greg Brown, coupled with Fer’s soaring and subtly powerful vocal approach, likened to that of Patty Griffin, puts a spit-shine polish on the finely crafted body of songs they have generated together. The intricate weavings of their vocal harmonies are undeniably exceptional. McGraw’s hard-hitting tunes echo narratives of the culture and landscape of the American West, wherein he thoughtfully spins tales of ev