From up north of Denver, the Fort Collins-based SpokesBuzz music organization is heading all the way south to Austin, Tex., again this year for its own SXSW party.

Take your protein pills and put your helmets on, thieves. This week we’ve got electro-rock from The Echo Chamber and ambient beauty from Long E, short e.

A city’s music movement doesn’t arrive on the national scene drop by drop. When it happens, and that is rare and remembered, it comes with a big splash. In that way, Colorado’s independent musicians are doing a cannonball into this year’s South by Southwest music festival, which starts in Austin, Texas, on Wednesday. Nothing predicts the tides of American pop music better than the annual Texas cavalcade of up- and-coming acts. And this year, the festival will be drowning in Denver sounds.