Multi-platform visionary Santigold issues the new battle cry, “Ain’t Ready,” which she envisioned with Canadian producer Illangelo, Dre Skull, and Sbtrkt. Get ready for more music when the full album “Spirituals” is out on Sept. 9 as she steps into her own power on her new label Little Jerk Records — and get anointed in person when she hits the Wiltern stage as part of her “Holified” tour Nov. 3.