Claim: Sonha Bihan was founded by Mamta Chandrakar and was aimed to introduce rap music to Bollywood, the Indian Hindi-language film industry based in Mumbai.
Evidence: The time when Bollywood music was influencing the local folk music, he started a company called "Sonha-Bihan" in 1974. Sonha-Bihan was aimed to keep the soul of folk music alive in people's heart and mind with this thought Sonha-Bihan performed in front of forty to fifty thousand people in March 1974.