Ali Akbar was two years younger than Robu [later named Ravi Shankar], but a couple of years ahead in his musical training. He has been through a brutal regime: Baba had even tied him to a tree and beaten him when his progress was unsatisfactory. Although Baba had arranged for Ali Akbar to marry at the age of fifteen, he still expected him to remain celibate — married to music. Twice Ali Akbar ran away. Ultimately the harsh discipline brought out his talent and made him into a master of the sarod, although one wonders about the emotional cost.
That is from Oliver Craske’s Indian Sun: The Life and Music of Ravi Shankar, which I am quite enjoying.