It's another sweet night with a death metal hoedown at the Siren's Song tonight as a touring circus of fleet-fingered folk fire into town to set your ears aflame. Denver's Spectral Voice joins Mortiferum from Olympia and Santa Fe's Superstition to grind steel against the dying light. Local rippers Unholy Oriface open. The hour of the power chord is 8 p.m. ($10).