Manhar Udhas is the elder brother of singers Pankaj Udhas and Nirmal Udhas. He completed his mechanical engineering training in Gujarat and moved to Mumbai in the late 1960s to look for a job. He was interested in music since childhood. His brother-in-law, who was making Gujarati film in Mumbai, introduced him to Music Director Kalyanji Anandji. Udhas used to hang around Kalyanji Anandji to help them in song recording. Once singer Mukesh was not immediately available. So it was decided to dub song in the voice of Udhas and later on Mukesh would sing over it. The song was 'aap se hum ko bichchade huye ek zamana beet gaya' for 1969 film 'Vishwas'. When Mukesh heard that song he said that Udhas has sung the song perfectly and there was no need to record the song in his voice. The song became a hit. It proved to be turning point in his career and after that there was no looking back.