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GRAHABEDAM
AND SYMMETRIES
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this notation, Grahabeda is very easy to handle. One simply moves
digits from one end of the number to the other. In the example just
considered, Sankaraabharanam is represented by [101011010101]. To
move the sruthi to Ri, we make the digit corresponding to Ri as
thefirst digit to get [1011010101]. The two digits which were
removed are moved over to the right end to obtain [101101010110]. This can
be easily verified to represent Kharaharapriya. This ability of a raga to generate other ragas
through Grahabedam is denoted by the term Murchanaakara. The
absence of this characteristic is termed Amurchanaakara. In light of
the above example, Dheeraankaraabharanam and Kharaharapriya are Murchanaakara
ragas. Sometimes, the process of grahabedam on a ragam leads to
non-existent scales. For example, if we take the Ni of Sankarabharanam
as the base swara, we get [110101101010]. This scale has two Madhyamas and no
Panchamam and such a scale is not allowable under the current melakarta scheme. Evidently, for a
raga to be Amurchanaakara, all the grahabeda derived scales of it
should be somewhat like this. Jhaalavaraali (39) is an example of a melakarta
which is an Amurchanaakara ragam. |
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Grahabedam and Symmetries |
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