1, Palace:

Usually equivalent to the do sound when the roll call is called for the first time today. "Gong" is the master and king of the five tones, commanding all the tones. Zhang Yan's etymology also said: "Each of the twelve strings has five tones, which show the Gongdiao ... (all): Huang Zhonggong (mode), Huang Zhongjiao (mode), Huang Zhongbian (tone sandhi), Huang Zhongzheng (mode) and Huang (mode).

2. Business:

Usually equivalent to the re sound in the first song today. "Shang" is the second level of the five tones, ranking behind "Gong". The ancients thought that "it is still gold, like a minister." There is a tone (type) name composed of the upper tone and the final tone. For example, in Yuefu Miscellanies, you should not learn from Duan Anjie's five tones and twenty-eight tones in the Tang Dynasty.

3. Angle:

Usually equivalent to the mi sound in this piece. "Jiao" is the third level in the five tones, ranking behind "Shang". The ancients thought that "horns belong to wood and people are like". There is a tone (type) name, which consists of angular sound and knot sound. In ancient music (style), there are some tunes with the horn as the key, or some tunes with the leap palace as the angle.

4. Logo:

Usually equivalent to the sol sound in this first piece. "Zheng" is the fourth level in the five tones, second only to "Jiao". The ancients thought that "the sign is a fire, but it looks like a thing." There is a tone (type) name, which consists of symbols-based sounds and knots.

5. Feathers:

Usually equivalent to the la sound in this piece. "Feather" is the fifth level of the five tones, ranking behind "sign". The ancients thought that "feather belongs to water and is the image of things". There is a tone (type) name composed of feather and knot. For example, in Yuefu Miscellanies, the "seven tones of flat voice and feather" should not be copied from Duan Anjie's five tones and twenty-eight tones in Tang Dynasty.

References:

Baidu Encyclopedia _ Ancient Five Tones