Ancient ‘Pitch’ Was More Than High and Low: What Do the Ten Degrees Measure?
The “ten degrees of one tone” are easy to misread as an ancient vocal scale.
But the Mirror Classic of Bian Que assigns them a much broader purpose.
After listing Zheng, Shao, Zhong, Kai, Pan, Zhi, Yu, Jia, Tai, and Shang, it says:
The ten qi of the various tones are all pivots of tone and voice, instruments of weight and balance, and agents of qi transformation. By knowing the going and coming endowed in tone and lü, one knows flourishing and decline in channel qi transformation, and thereby knows the counterflow or conformity, fullness or deficiency of blood and qi.
The purpose of the ten degrees is therefore to distinguish the flourishing and decline of channel qi transformation and the counterflow, conformity, fullness, and deficiency of blood and qi.
“High and low” has at least two layers
Section titled ““High and low” has at least two layers”The first is of course an audible difference. The text explicitly speaks of the “high and low of tone.”
The second is that these audible differences are used as indicators of qi-transformational state. Sound itself is the “mirror”; what it is intended to reflect is the internal going and coming, flourishing and decline.
Therefore, Shang-Gong should not be directly equated with a fixed number of hertz, nor Shao-Jue with a single disease. The text establishes a relative scale of degrees, not a ready-made modern frequency table.
The same degree can cross different Five Tones
Section titled “The same degree can cross different Five Tones”“Shao,” for example, can occur as Shao-Gong, Shao-Shang, Shao-Jue, Shao-Zhi, and Shao-Yu. “Tai” can similarly occur across all five tones.
This means Shao/Tai is one horizontal degree dimension, while Gong-Shang-Jue-Zhi-Yu is another categorical dimension.
As a matrix:
| Degree | Gong | Shang | Jue | Zhi | Yu |
|---|---|---|---|---|---|
| Shao | Shao-Gong | Shao-Shang | Shao-Jue | Shao-Zhi | Shao-Yu |
| Tai | Tai-Gong | Tai-Shang | Tai-Jue | Tai-Zhi | Tai-Yu |
The other degrees follow the same pattern.
This matrix structure prepares the next step: “two tones sharing a degree.”
From single values to relations
Section titled “From single values to relations”Knowing only that a sound is Shao-Jue still gives a single state. But qi transformation in the body is not a single-variable system. Different channels, left-right locations, and different tonal classes can appear together.
So the Mirror Classic does not merely add more standalone tone names. It asks: how should the relation between two tones be encoded?
Its answer is the ten “transformation tones”: An, Fu, Gong, Ge, Zhi, Ling, Jie, Bian, Sui, and He.
The importance of the ten degrees is that they transform tone and voice from five large labels into a hierarchical, relational, combinable state space.
The next article begins to decode the ten names that appear most obscure at first glance, yet form the core of the book’s relational encoding.