There’s a reason Lindsey Buckingham is portrayed as the aloof-and-silent type on Saturday Night Live’s “What’s Up With That?”: In real life, he’s always seemed that way. Yet his songs with Fleetwood Mac—many of which he sang—remain some of the most heartrendingly intimate ever committed to mass consciousness. His solo work since Mac’s prime has been hit or miss, but 2008’s Gift Of Screws was a beautiful reminder of Buckingham’s bygone directness and warmth. His new album, Seeds We Sow, sees him shying away from that sincerity, but occasionally eliciting gooseflesh for all the right reasons. “Illumination” is a sharp, accusatory screed that vibrates like a Tusk outtake, and “In Our Own Time” wrings sorcery out of Buckingham’s signature finger-picked arpeggios and haunted swathes of harmony.