As a listener of traditional music, I've always been moved by subtlety, finding much to be garnered from musicians who are truly steeped and saturated with the idioms of their musical language, and where mastery is shown by depth instead of flash and flair. It's this sense of saturation and depth that we find in Charm City Junction, a Baltimore-based quartet featuring bluegrass fiddler Patrick McAvinue, old-time banjoist Brad Kolodner, irish accordionist Sean McComiskey and