Indian music

I've been reading about Indian music lately. Improvisation is a big
part of the style used. They have time signatures more complicated then
we do, their rythmics cycles can have 4, 7, 11 or 24 beats before
repeating. There are many many modes, called ragas, that set the mood of
the music. Each raga contains the tonic and the fifth (sa and pa) plus a
variable number of other notes, give scales of 5, 6, 7 or in some cases
8 or 9 degrees. The tonal system is roughly based on a large chromatic
scale of 12 notes. 12? Not exactly. With the exception of sa and pa,
all the notes can be played with 2 intonations, a 81/80 apart. So what
you get is more or less a chromatic Pythagorean scale plus a 5-limit
chromatic scale. Those of you interested in learning more can check
http://hypatia.ucsc.edu:70/1/RELATED/Batish/Archives/Rago1

My question is : When playing a note in a given raga, which note, of the
two shrutis separated by a comma, is the "right" one? There are many
raga listings, but they dont seem to take this subtlety into
consideration.

-Kami

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