The sound of the MV is definitely different from that of the concert. First, the sound of the MV must be processed. When recording, noise or ventilation sound must be removed to ensure the best sound effect.

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. . . .