Abstract—The music plays a vital role in the life of humans. People listen to music for fun, entertainment, relaxation and mental peace. The music can be applied for recovering from illness and physical fatigues. The Raga is considered as a basic unit of Indian Classical Music. The behavior of the Raga is recognized by Swara (notes) movement. The Raga may be sung as per environmental situations, events, and emotions at the particular time. In this paper, the properties of Indian Classical Music are listed which are useful for Raga identification. The various feature extraction techniques from Digital Signal Processing and Raga Identification techniques for classifying the Indian Classical Music are discussed. The paper provides several challenges for the future work.