The following is the information about Rishabha and its importance in Indian classical music : So the svara Re is formed from Shadja.
For example, if these are the 3 Shruti's of Re then, In the introductory part of Rishabha it is given that, 'Rishabha is the long form of the syllables रे and री.
In Hindustani classical music, the pronouncing of Rishabha is done as Re and in Carnatic classical music, the pronouncing of Rishabha is done as Ri.
So a Hindustani classical singer will sing the 7 svaras as : Sa Re Ga Ma Pa Dha Ni Sa.
While a Carnatic classical singer will sing these svaras like : Sa Ri Ga Ma Pa Dha Ni Sa.