It is impressive to see the mastery of classical music and the command over the Urdu language for someone so young and one can admire the rich texture of his voice even seven decades later.
Pran Nevile on the child prodigy.
… when K.L. Saigal was working with Remington Typewriter Company in Shimla he often visited their house to meet Master Mohan, Madan’s elder brother. Saigal would bring his harmonium and both of them had long singing sessions with Madan (who was only two) attentively listening to them.
Shanti Devi has mentioned an unforgettable train journey from Kalka to Shimla with Saigal, Mohan and Madan. They had kept singing all the way, much to the amusement of the passengers. Later after Saigal had joined New Theatres Calcutta, he always looked after Master Mohan and Madan whenever they visited Calcutta. In fact, Saigal became very fond of Master Madan and admired his instinctive knowledge of music and his mastery in singing intricate classical compositions with perfect ease in his heavenly voice.
Update: Fawad has more information on Master Madan and the 8 recordings that have survived.