After a few years of relative quiet from the Lake Worth singer/songwriter, it's a relief to hear that John Ralston can still fill a single tenor note with vulnerability and hope, glee and introspection, or wisdom and bitterness. His latest album, Shadows of the Summertime, proves to be one of the finest alt-country/roots collections the area has ever heard, and above all, it's his relaxed vocal style — a tad like Tom Petty, a smidge of Jeff Tweedy, but mostly just uniquely Ralston — that makes it definitive. His recent recordings with Invisible Music show an equal amount of polish, so he might not only be the best vocalist but the hardest-working one as well.