Besides, I know what you mean. When you say voice change, you should mean that his voice feels a little different. One possibility is that his live singing will be different from the CD you listen to, which is normal; Secondly, I don't think it's good. It's his work for more than eight years. In the next few years, he had nose plastic surgery one after another, so his voice changed a little more or less, so his voice sounded slightly different. . . .