Singer: S. P. Shailaja
Ragam: Mohanam / Bhoopali / Bhup
Raja has carefully employed a Graha bedham / Sruthi bedam in the above song. So for some it will sound as if sudha saveri. Graha bedham of a musical scale in Carnatic music (rāgam in South Indian classical music), is the process (or result of the process) of shifting the Tonic note (śruti) to another note in the rāgam and arriving at a different rāgam.
Graha literally means position and bedham means change. Since the position of the śruti is changed (pitch of the drone), it is also sometimes called Swara bedham or Śruti bedham though Śruti bedham and Graha bedham have some technical differences
The arohanam and the avaroganam of Mohanam / Bhoopai is
S R2 G3 P D2 S
S D2 P G3 R2 S
and the arohanam & avaroganam of Sudha Saveri is
S R2 M1 P D2 S
S D2 P M1 R2 S
If we carefully look at the notes, sudha saveri varies from Mohanam in the third note [Gha3 for mohanam and Mha1 for Sudha saveri].
But if we think logically, we can bring sudha saveri from Mohanam, if we extrapolate and shift the sadjam. In the song, the chord progressions are such a way, that the panchamam is heard as sadjhamam to our ears and thus we conceptualise the whole composition to be on shudha saveri ragam.
இளையராஜா இப்பாடலில் கிரக பேதம் / ஸ்ருதி பேதம் செய்து உள்ளார், அகவே சிலருக்குப் இப் பாடல் " சுத்த சாவேரி" போல் தொனிக்கும்