Bob Dylan did what very, very few singers ever do. He changed popular singing. And we have been living in a world shaped by Dylan's singing ever since. Almost no one sings like Elvis Presley anymore. Hundreds try to sing like Dylan. When Sam Cooke played Dylan for the young Bobby Womack, Womack said he didn't understand it. Cooke explained that from now on, it's not going to be about how pretty the voice is. It's going to be about believing that the voice is telling the truth.
 
To understand Bob Dylan's impact as a singer, you have to imagine a world without Tom Waits, Bruce Springsteen, Eddie Vedder, Kurt Cobain, Lucinda Williams or any other vocalist with a cracked voice, dirt-bowl yelp or bluesy street howl. It is a vast list, but so were the influences on Dylan, from the Talmudic chanting of Allen Ginsberg in "Howl" to the deadpan Woody Guthrie and Lefty Frizzell's murmur. There is certainly iron ore in there, and the bitter cold of Hibbing, Minnesota, blowing through that voice. It's like a knotted fist, and it allows Dylan to sing the most melancholy tunes and not succumb to sentimentality. What's interesting is that later, as he gets older, the fist opens up, to a vulnerability. I have heard him sing versions of "Idiot Wind" where he was definitely the idiot.
 
I first heard Bob Dylan's voice in the dark, when I was 13 years old, on my friend's record player. It was his greatest-hits album, the first one. The voice was at once modern, in all the things it was railing against, and very ancient. It felt strangely familiar to an Irishman. We thought America was full of superheroes, but it was a much humbler people in these songs — farmers, people who have had great injustices done to them. The really unusual thing about Bob Dylan was that, for a moment in the Sixties, he felt like the future. He was the Voice of a Generation, raised against the generation that came before. Then he became the voice of all the generations, the voices in the ground — these ghosts from the Thirties and the Dust Bowl, the romance of Gershwin and the music hall. For me, the pictures of him in his polka-dot shirt, the Afro and pointy shoes — that was a brief flash of lightning. His voice is usually put to the service of more ancient characters.
 
Here are some of the adjectives I have found myself using to describe that voice: howling, seducing, raging, indignant, jeering, imploring, begging, hectoring, confessing, keening, wailing, soothing, conversational, crooning. It is a voice like smoke, from cigar to incense, where it's full of wonder and worship. There is a voice for every Dylan you can meet, and the reason I'm never bored of Bob Dylan is because there are so many of them, all centered on the idea of pilgrimage. People forget that Bob Dylan had to warm up for Dr. King before he made his great "I have a dream" speech — the preacher preceded by the pilgrim. Dylan has tried out so many personas in his singing because it is the way he inhabits his subject matter. His closet won't close for all the shoes of the characters that walk through his stories.
 
I love that album Shot of Love. There's no production. You're in a room hearing him sing. And I like a lot of the songs that he worked on with Daniel Lanois — "Series of Dreams," "Most of the Time," "Dignity." That is the period where he moves me most. The voice becomes the words. There is no performing, just life — as Yeats says, when the dancer becomes the dance.
 
Dylan did with singing what Brando did with acting. He busted through the artifice to get to the art. Both of them tore down the prissy rules laid down by the schoolmarms of their craft, broke through the fourth wall, got in the audience's face and said, "I dare you to think I'm kidding."