THIS morning this knocked me out of my blue haze. Percussionist Emil Richards was interviewed on NPR’s Weekend Edition Sunday this morning. He told stories about Sinatra and playing the xylophone for cartoons (they can be both antic and whimsical, no?). He of course was part of The Wrecking Crew — that fabled stable of L.A.-based studio musicians who provided the backspace moods, grooves, foundation for so much of midcentury music as we know it. Five minutes of way-back machine fun.