Some artists go on feeling like secrets long after they’ve started being told. Leif Vollebekk, who released his third album last February is one of these singer-songwriter treasures. Born in Ottawa in 1985, he taught himself music using instruments inherited from his grandfather: harmonica, guitar, piano, an old fiddle. Vollebekk’s latest, long overdue LP, Twin Solitude, is the product of everything that came before: the unending tours, the slow cover songs, the experience of seeing Prince, alone at a piano.