Those unfamiliar with Chrystia Cabral’s SPELLLING are being gifted the ideal entry point: The Bay Area art-pop pathfinder is breathing new life into her output to this point on her forthcoming fourth album, the self-produced SPELLLING & The Mystery School, coming Aug. 25 on Sacred Bones. Our latest preview of the career-spanning LP is “Hard to Please (Reprise),” a revitalized …