What is the tone of "average" in ancient poetry?

In ancient times, there were four tones of * * * and each tone was divided into eight tones of * * * according to Yin and Yang.

The four tones are flat, rising, going and entering (which can be misunderstood as flat, rising, falling and short)

Yin tone corresponds to voiced initials, while Yang tone corresponds to voiced initials. The crisp tone of Yin is higher, and the deep tone of Yang is lower.

In addition to the flat voice, the third place calls itself flat, that is, if it is uneven, it will be flat.

These are archaic sounds. Modern tones are different from ancient ones.

There is little difference between the tones of southern dialects and ancient tones, and the basic pattern of four tones and eight tones is the same, so it is easy to distinguish flat tones.

The tones of northern dialects and Putonghua are very different from those of ancient times. In particular, the entering tone (short tone) disappeared, and some of them became flat tone, which caused great difficulties in reading and writing poetry. Therefore, northerners need to spend some energy to understand which words are pronounced in order to distinguish flat and even words. In addition, the so-called one or two tones in Mandarin basically correspond to flat tones, three tones basically correspond to rising tones, and four tones basically correspond to falling tones.