Static is an online stream tuned permanently to alternative rock's loudest two decades. Its playlist covers the 1990s and 2000s — grunge, post-grunge, indie rock and nu-metal-era guitar bands — the music that once ruled American modern-rock FM. There is no talk format layered on top; the channel simply keeps the distortion pedals of the Clinton and Bush years humming for listeners who still hear those riffs as the sound of youth.