Hamsanadam

It is a pentatonic scale (audava rāgam, which means "of 5"), as it is sung in current days.

It is called an audava rāgam,[1] in Carnatic music classification (as it has 5 notes in both ascending and descending scales).

Its ārohaṇa-avarohaṇa structure is as follows (see swaras in Carnatic music for details on below notation and terms): This scale uses the notes shadjam, chatusruti rishabham, prati madhyamam, panchamam and kakali nishadam.

[1][2] Hamsanadam's notes when shifted using Graha bhedham, yields two pentatonic rāgams, Gambhiranata and Bhupalam.

For more details and illustrations of this concept refer Graha bhedham on Gambhiranata.