WHAT ARE THE 12 CAKRAS OF 72 MELAKARTA RAGAS?

The 72 Melakarta Ragas constitute the basic  and fundamental Ragas from which other Ragas can be generated.

The Melakarta Ragas are classified into 12 divisions known as Cakras comprising 6 Ragas each as follows:

 Indu

 Netra

 Agni

 Veda

 Bana

 Ritu

 Rishi

 Vasu

 Brahma

 Disi

 Rudra

 Aditya

WHO ARE THE 12 VISVEDEVAS?

There are 12 ViSvedevas as follows:
(1) SrAddham - PurUrava, Ardrava
(2) MahAlayam - Dhuri, Rocana
(3) NAndI - satya, vasu
(4) YAga - Kratu, Daksha
(5) sapindIkaraNa - KAla, KAma
(6) sanyAsinah - sAdhu, ruru