Bharata's Natya Shastra states in Chapter 28, Shloka 27 and 28, the shrutis in Madhyama Grama. As M1 functions as the 'new' Fundamental frequency (Shadja), M2 must become redundant as it is too close to it. Also, in this new scale, P from Shadja Grama operates as P2 or (musically, Ati-Tara Rishabha, see Nomenclature table below), and Tara Rishabha or a shruti at an Interval ratio 10/9 (Just Major Second) is absent. To create this missing Tara Rishabha, P2 must be lowered by Interval ratio of 81/80 (Pramana) creating a new shruti P1. Chaturdandi Prakashika (Sanskrit) by Pandit Venkatamakhin in Shloka 65 and 66, Chapter 3, confirms the positions of Panchama both in Shadja and Madhyama Gramas as,