Image courtesy of Flickr, Howdy, I'm H. Michael Karshis

Each year, the Interactive and Music portions of SXSW bleed into each other more and more, with bands performing at tech parties and music apps popping up all over the damn place. Never has the marriage of nerd and indie been so apparent, however, as in a new app created by the band BlueBrain: The Violet Crown.

The Violet Crown is, according to the band’s Vimeo page, “a musical composition, available exclusively as a free iPhone app, that uses the phone’s built-in GPS to alter the music as the listener traverses the area — each street and intersection is tagged with various pockets of sound, turning the festival grounds into a musical ‘choose-your-own-adventure.’”

This isn’t the first location-based album.app that BlueBrain has created. In October, the band launched an app for New York’s Central Park titled Listen To The Light that turned the park into a massive instrument, and their first offering, The National Mall (which could only be experienced at that national landmark), earned BlueBrain an O Music Award nomination for Best Music App.

Starting March 9, users can download the SXSW-flavored app for zero pennies. As if the free beer/shows/love weren’t enough.