After the Ritsuryo Legal Codes were established, the Professors of Ondo were positioned within the Daigaku-ryo system, but because their role was to teach the reading aloud of the scriptures during the first course of Confucianism to the students of the main course (later known as Myogyodo, the Confucian department of Daigaku-ryo), their position was only deemed to be supplementary and it was not mentioned within the regulations that they may have their own students like Sando (Mathematics) and Shodo (Calligraphy) Departments.
律令制確立後に大学寮の下に音博士が位置づけられたが、本科（後の明経道）の学生が儒教の教育を受けるために行う最初の課程であった経典の音読を指導するのが役割であった事から、算道・書道_(大学寮)のような独自の学生を保持することは学令などにも記載されていないなど、最初から補助的地位に止められていた。