Following years of training, master singers sometimes change or add new parts to a pansori song, inputting aspects of their own individuality.
First, because Pansori was a popular art form among the public, in order to meet the expectations of various audiences or to cater to changing tastes depending on the times, there was a need to constantly pursue novelty in performances.
Fourth, the unique characteristic of Pansori transmission called "Gujunsimsoo" (구전심수; 口傳心授) also contributed to the emergence of Deoneum.
[2] The oldest one, called "Going Out to Let a Swallow Go," is found in the song "Heungbuga," and was sung by Gwon Sam-deuk in the Joseon Dynasty.
Other cases of deoneum are: "Namwongol playboy" in "Chunhyangga" was sung by Dal Yeo-gye, incorporating the first application of gyeonggi minyo (a Korean traditional song originating in the Seoul and Gyeonggi area) in pansori.