The venerable Blue Note Records label was founded in 1939, and from the late 1940s onward emphasized what was most modern about jazz.  Blue Note became well known, of course, for the hard bop classics recorded under its aegis.  But the varied influences that created hard bop led Blue Note to explore how the avenues of soul, rock and blues intersected with that of jazz.  Three new releases from Real Gone Music and the reactivated Dusty Groove Records label explore three sonically-diverse titles from the storied Blue Note catalogue circa the early…