Among the many conflicting and contested histories of the sarod, there is one that attributes its invention to the ancestors of the present-day sarod maestro, Amjad Ali Khan. Amjad Ali Khan’s ancestor Mohammad Hashmi Khan Bangash, a musician and horse trader, came to India with the Afghan rubab in the mid-18th century, and became a court musician to the Maharajah of Rewa (now in Madhya Pradesh). It was his descendants, notably his grandson Ghulam Ali Khan Bangash, a court musician in Gwalior, who changed the rubab into the sarod we know today. A parallel theory credits descendants of Madar Khan, Niyamatullah Khan in particular, with the same innovation around 1820. The sarod in its present form dates back to approximately 1820, when it started gaining recognition as a serious instrument in Rewa, Shahjahanpur, Gwalior and Lucknow. In the 20th century, the sarod was improved significantly by Allauddin Khan and his brother Ayet Ali Khan. They increased the number of chikari (drone) strings and increased the number of tarafdar (sympathetic) strings. However, as is the case with most young, evolving instruments, much work remains to be done in the area of sarod luthiery in order to achieve reliable customization, and precise replication of successful instruments. This reflects the general state of Indian instrument-making in the present day.