He should not be confused with the very popular composer of the same name, Amarnath, who was very active in Lahore and Mumbai film industry.
He was the first and closest disciple of Amir Khan, who founded the Indore gharana of Indian classical music.
He also provided music for the 1955 film Garam Coat starring Balraj Sahni and Nirupa Roy, with songs by Lata Mangeshkar.
This included the first and only ghazal recorded in the voice of Amir Khan; the documentary was made by M. S. Sathyu.
[5] A book on his mémoires of Amir Khan, titled "Indore ke Masiha/Prophets of Indore, mémoires of my guru, Ustad Amir Khan Saheb", was published in 2008 by the Pandit Amarnath Memorial Foundation.