Music director S. D. Burman is credited with spotting Kumar's talent for singing. During the making of "Mashaal" (1950), Burman visited Ashok's house, where he heard Kumar imitating K. L. Saigal. He complimented him and told him that he should develop a style of his own, instead of copying Saigal. Kumar eventually developed his own style of singing, which featured yodeling, which he had heard on the records of Tex Morton and Jimmie Rodgers.S. D. Burman kept making Kishore sing for Dev Anand from the 50s to the early 70s. S. D. Burman provided him the training and encouraged Kumar a lot, especially in the late 50s and early 60s, resulting in Kumar developing into a great singer in the future years.