Bappi had burst on the scene with the advent of disco songs towards the late 1970s with his popular compositions in Mithun Chakraborty’s spy flicks such as Surakksha (1979) and soon reached his peak with Namak Halaal (1982) and Disco Dancer (1982). In no time, he raced ahead of all the reigning monarchs of Hindi film music, including Pancham, Laxmikant-Pyarelal and Kalyanji-Anandji, with his ability to meet the growing demand for the fast-based techno-disco songs, which had become a rage after the phenomenal popularity of Biddu’s 'Aap jaisa koi', sung by Pakistani teenager Nazia Hassan in Feroz Khan’s Qurbani (1980). Bappi Da’s Hari om hari sung by Usha Uthup in Pyara Dushman (1980) was one of his early disco successes.