音乐指挥是为了指出旋律的变化,使歌手们的演唱或乐队的演奏整齐规范。在记谱法尚未问世时,音乐基本靠口头传授。在祭祀舞蹈中领头的人便成了最早的指挥,他为了向人们提示旋律的进行方向,便用手在空中“划”出旋律线来。然而这种“手势术”既不方便又不准确。 Musical conductor is to point out the melody changes, the singers singing or band play neat standard. When the notation method has not yet come out, the music basically relies on oral teaching. The leader of the ritual dance became the earliest conductor. In order to show people the direction of the melody, he used his hand in the air to draw a melody line. However, this “gesture ” is neither convenient nor accurate.