piano tuning / Indian music scales...?

[Thomas Hudson]

RevTor at aol.com wrote:
> 
> All,
>   Im in the process of getting my CV keyboard up and running and since I
> already have a midi/cv converter, I was thinking of maybe setting this up in
> a different scale, perhaps a microtonal style tuning.?  correct me if i am
> wrong, but is this the Indian scale?  Sure you can rig up a decent sitar
> patch, but it doesnt sound too convincing with the standard piano tuning.
> So.. Is this possible?  Could it be done by replacing the 100ohm resistors on
> each key to another value?  Or would pots be needed and each one need to be
> tuned?  Or is the basic piano key architecture not sutiable for what I want
> to do?  Anyone have any links off hand relating to this?  Thanks again,
> ~SteveM

While a lot of patches can get the sitar sound, if you ever start trying
to imitate some of the great sitar players, you come away disapointed
because the western scale doesn't match up with the indians scales.

Indian music uses several different increments (Sruti) between notes
depending upon the raga being played:

SA=C
SA + First Sruti = 22 cents
SA + Second Sruti = 90 cents
SA + Thrid Sruti = 70 cents

To create the second note of a scale you add the either the first sruti
(22),
the first and second sruti (112), all three (182), or two of the first
and
one each of the second and third (204).

So the scale would go:

SA = Start
RI = one of four pitches
GA = ditto
MA = ditto
PA is always 702 cents above SA
DHA = one of four
NI = ditto

Happy microtuning.

Thomas