A FEW YEARS AGO, while flipping through the new arrivals crate at Nice Price Records in Raleigh, North Carolina, where I was visiting family over the holidays, I became transfixed by what I heard playing on the store’s stereo system. It was immediately recognizable as Christmas music: A jubilant, resonant male baritone implored the listener to “let me hang my mistletoe over your head / and let me love you.” But the voice, landing somewhere between the velvet burliness of Teddy Pendergrass and the genteel phrasing of Lou Rawls, like the lustrous production and extravagant, modern R&B arrangement,