It is the 55th in the 72 melakarta rāgam system of Carnatic music, and is called Shāmaḻam in the Muthuswami Dikshitar school of that genre.
[2] Its ārohaṇa-avarohaṇa structure (ascending and descending scale) is as follows (see swaras in Carnatic music for details on notation and terms): Shamalangi's swaras are chathusruthi rishabham, sadharana gandharam, prati madhyamam, shuddha dhaivatham and shuddha nishadham.
It is the prati madhyamam equivalent of Jhankaradhwani, which is the 19th melakarta scale.
A few compositions set to Shamalangi rāgam are: When shifted using Graha Bhedam, Shamalangi's notes yield two minor melakarta rāgams: Ganamoorti and Vishwambari.
Graha Bhedam is the step taken in keeping the relative note frequencies the same while shifting the shadjam to the next note in the rāgam.