It's New Music Tuesday and in this installment NPR music critic Ann Powers reviews new releases from Wild Flag and St. Vincent. Wild Flag is an indie super group featuring Sleater-Kinney members Carrie Brownstein and Janet Weiss, Mary Timony from Helium and Rebecca Cole of The Minders. On their debut album, simply called Wild Flag, the band goes from punk to progressive in effortless leaps and bounds. Recording as St. Vincent, Annie Clark's new album is called Strange Mercy. It features Clark's soothing voice and deft guitar work.