Later, it was used as a musical instrument for festive occasions like Bihu. An improved version of Pepa was also developed in the Chutia kingdom which was known as Kaali (made of copper) as mentioned in Deodhai Buranji (where Ahom king Suhungmung brought in Kaali instruments from Sadiya to Sibsagar).
In the future, Pepa was employed as a musical instrument for festive gatherings such as Bihu. Additionally, an improved model of Pepa was developed in the Chutia kingdom and called Kaali (made of copper), which is documented in Deodhai Buranji (where Ahom king Suhungmung introduced Kaali instruments from Sadiya to Sibsagar).