As you might have heard, local legend Mary Timony (Helium) recently got together with Sleater-Kinney guitarist Carrie Brownstein, Janet Weiss (Quasi, Sleater-Kinney), and Rebecca Cole (The Minders) to form the Merge Records powerhouse that is Wild Flag. Today, NPR posted a new Wild Flag single called “Glass Tambourine.” It’s one half of a Record Store Day 7-inch the band will release on April 16. Produced by Spoon’s Britt Daniel, the track kicks off just how you might might expect from an ex-Sleater-Kinney, ex-Helium band—-casually delivered vocals following the catchy melody of the single-note guitar line. From there, it just gets trippy. The mildly psychedelic post-punk doo-wop vibe morphs into a sea of vocal harmonies and gives way to a freaked out guitar solo, replete with swirling effects and interstellar riffs. The song yields both a rad pop chorus and sonic exploration. If you’re headed to SXSW this month, make Wild Flag’s set a must-see on your schedule. Or if you’re not, catch White Flag March 10 at the Black Cat. $13.