Who? Gene Puerling died late last month at 78. And if you don’t know who he is, you should. I grew up obsessed with my older brother’s Four Freshman albums and learned to sing harmony from them. I moved on to the Beach Boys, Manhattan Transfer and Take 6, and I loved my sons’ Boys to Men CDs. And they all owe a debt of gratitude to Puerling, who was the godfather of close-harmony singing. The recordings by his studio group, The Singers Unlimited, with the peerless Bonnie Herman, are masterworks. May his heavenly choirs be in perfect tune and vibrato-less!