There are many different styles of music in India. The music described here is North Indian (Hindustani) classical music. You will find a section on bhangra music under the dance topic.
Indian musicians learn to play raga (patterns of notes) by imitating and memorising. The music is passed on from teacher to student by oral tradition. Students belong to an extended family of musicians learning from a particular master. This is known as the master-student tradition.
Most Indian classical music is based on a combination of rag (melodic form), tal (rhythmic form) and drone (sustained note).