The Indian musicologist who wrote the first modern treatise on Hindustani classical music influenced what person who played a key role in the development of All India Radio? 
Jaideva Singh: Jaideva Singh (19 September 1893 in Shoratgarh, Uttar Pradesh – 27 May 1986 in Banaras) was an Indian musicologist and philosopher. Jaideva Singh:  He was influenced by the Indian musicologist Vishnu Narayan Bhatkhande.
i don't know