In its 1960s heyday, Atlantic Records was the destination for deeply-felt soul.  Aretha Franklin, Dusty Springfield, Solomon Burke, and Wilson Pickett were just a handful of the artists there who defined the sound of soul music.  Lesser-known but no less significant were The Sweet Inspirations.  Today, the vocal quartet might be best-remembered as Elvis Presley’s preferred onstage backup group, but The King was just one of a staggering number of artists they supported – including the aforementioned artists and even Jimi Hendrix. But Atlantic rightfully believed that these talented singers didn’t have…