《资治通鉴·隋纪·隋纪二》
因此，牛弘等人上奏请求重新使用旋宫法演奏音乐，可是文帝还记着以前何妥所说的话，于是就在牛弘等人的奏书上面批示，不许采用旋宫法，仍旧只使用黄钟一宫。
弘等乃奏下请复用旋宫法，上犹记何妥之言，注弘奏下，不听作旋宫，但用黄钟一宫。
Therefore, Niu Hong and others requested to play music with the whirling palace method again, but Emperor Wen still remembered what He Tuo had said before, so he made a note on the memorial of Niu Hong and others, not allowing the whirling palace method to be used, and still only using the yellow bell palace.