He’s a mystic wanderer, the type who seeks transcendence in darkness as well as in light. He never hides his voice. It’s a huge, barreling wail, a declamatory roar. And the music matches the majesty of that voice, calling on traditions that can sometimes go past ancestral country music and into tribal-chant territory. This is big music, a type of music that we don’t often hear anymore. It’s music for calling down heaven.