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).
Later, it was employed for celebratory purposes such as Bihu. Moreover, an improved model of Pepa was also created in the Chutia kingdom and known as Kaali (made of copper), which is documented in Deodhai Buranji (where Ahom king Suhungmung brought Kaali instruments from Sadiya to Sibsagar).