If you want to want to go back to traditional roots, then look no further than Shankar Mahadevan Academy where you can learn Hindustani and Carnatic music. The Academy offers vocal courses for adults as well as children, but that's not all. If you're already a trained classical singer, you may also want to check out the teacher's training course that will give you a certification to carry on the tradition of Indian classical music to others who are interested.
Cost: Hindustani Classical or Carnatic Music classes begin at INR 9,000