Music graduate student Suhail Yusuf Khan will be a featured guest artist at the Berklee Indian Ensemble on May 9. In addition, he will conduct a master class on Hindustani music and the sarangi, one of the oldest string instruments featured in North Indian classical music. The sarangi is the only instrument in the world that can emulate all the nuances of the human voice. Played with a bow, this instrument has three main strings and 37 sympathetic strings. Khan started to play the instrument when he was 7 years old. The grandson of the sarangi legend Ustad Sabri Khan, and nephew of…