കടപയാദി സംഖ്യാക്രമം - ഡോ. കെ. ജെ. യേശുദാസ് KaTaPa yadi Raga System in short - Dr. K. J. Yesudas

Katapayadi Sutram
The Katapayadi Sutram is a system in Carnatic music (Indian classical) which allows one to find the ‘number’ of a melam raga. The system only works with the Melakartha ragas, which are labeled from one through seventy-two. The number can then be used to find the exact notes of the scale (for example, whether the 4th note, equivalent of Western Fa, is high or low. The notes are defined only in relation to each other, not on a fixed scale like in Western music). The process is simple. The process is tied to the Indian alphabet Devanagari, though it will usually work pretty well no matter which Indian alphabet you use. That although Devanagari is indeed in rows of five, for the Katapayadi convention the rows are taken in twos.