Sastras in Odissi Music refer to the various musical treatises from which the classical music style has drawn inspiration. Sastras are the written musical traditions which are preserved in musical notation as opposed to oral transmissions. The written work contains the technical instructions for performing the work. Odissi dance followed the universally accepted Sastras like Natyashastra and Abhinay Darpana Prakash while gaining its special identity by following regional Sastras like Abhinaya Chandrika and Natyamanorama etc. Odissi Music has followed much the same path as Odissi dance in its formulation and development.

The musical philosophy of Natyasastra and Sangeet Ratnakar has been followed in Odissi music. At the same time, Odissi music has taken its special features from regional Sastras like Geeta Prakash and Sangeeta Narayan. Raaga Vasant can be taken as an illustration. According to Sangeet Ratnakar (Raaga Vibekadhyay, Part II, slokas 93,94, 95) this Raaga is created from five Swaras of Raaga Hindol. If Hindol Raaga is composed with seven Swaras then it is transformed into Vasanta Raaga. These two are included in Dhaivati and Arsavi Jati. But Vasanta Raaga is described differently in Odissi Sastra `Sangeet Narayan` as follows:

According to Sangeet Narayan, Raaga Vasant originated from Sadajmadhyamik Jati and is included in maschharikrita murchhana. If the swara of this murchhana is presented in Hindustani style then it turns more or less into Khamaj thhat.

This proves that though Odissi music is broadly based on Sastras from which mainstream Sastriya music also draws its rules, it also takes the help of some regional Sastras to create its special regional identity. Sometimes a Raaga`s character has been expounded almost in the same manner in both universal as well as regional treatises. Raaga Shree can be taken as an example.

According to Sangeet Ratrakar of Sarngadeva (13th century), the Odissi Sastra `Geeta Prakash` by Krishnadas Bada Jena Mahapatra (16th century) and the `Sangeet Narayan` (17th century) the characteristics of Shree raaga are as follows:

i) Jati: Sadaja;
ii) Pancham swara used very sparsely;
iii) Raaga belongs to Sadaj Gram;
iv) Raaga is suitable to express Sringara as well as Veera Rasa according to Sangeet Narayan while Sangeet Ratrakar mentions only Veera Rasa and Geeta Prakash makes no mention;
v) One important difference is while according to Sangeet Ratrakar Gandhar is the Graham, Ansa and Mandra Swara, Odissi Sastras, Geeta Prakash and Sangeet Narayan Nyasa and Graham Swaras are Sadaj.

Thus discussed are the Sastras in Odissi Music.