He speaks slowly and with a voice as deep as the bass grooves for which he’s famous.  Methodical ... contemplative ... serene. All are hallmarks of a spiritual leader, which is what Aston “Family Man” Barrett is these days. More so than a musician, he’s the keeper of the flame—the man who carries a torch for his old friend, reggae legend Bob Marley, and still holds it aloft for the rest of the world to see.  “This, this is everything to me,” Barrett told The Daily Times this week. “That’s why I came up with that name—‘Family Man’—because I’m everything from the bandleader to the bass player to the musical arranger to the producer. I’m the on who put the band together ...