【Anonymous Delivery】This book covers the mechanics of voice, psychological perspectives, scientific frequency analysis, and specific improvement training, making it suitable for salespeople, musicians, and vocalists. There is some minor wear and tear, and some yellowing on the inside of the spine, but the inside is relatively clean and still very readable. Vocal Training Sound Engineer Mastering Vocal Training Voice Training Vocal Training Karaoke Sekai Ichi Uketai Jugyo (The Class You Want to Take the Most in the World) Matsumi Suzuki Ei Fukushima Nihon Onkyo Kenkyujo (Japan Acoustics Laboratory)