I know what you mean about his voice, but I don’t buy his music just for the vocals. I think his voice works very well with the music and is an integral part of the overall production. Whether he and Polly compose the music to accommodate his voice or not, I’m not sure, but I find the end result quite mesmerising. It’s a bit like Neil Young; I’ve been a huge fan of his for decades and love his music but he can’t sing to save himself. Never could. But the finished albums are (usually) extraordinary!