For more details, please see below. https://www.ongakunotomo.co.jp/catalog/detail.php?id=192505 [Feature 1] You can hear more, and the sound changes! How to use "Chorus & Vocal Practice" Whether incorporating singing into practice, having a chorus appear in the middle of a song, or performing a full-fledged chorus at a concert... there should be surprisingly many situations where you "sing" even if you're in a wind band. From the basics to the musical aspects, there are many good things about incorporating singing into practice. If you're going to sing, do it more beautifully and effectively! Why not aim for a two-sword style of wind band (instrument) and chorus (singing)?