Re: Persian musical koron and sori

From: Hans Aberg (
Date: Sun Feb 01 2009 - 14:55:02 CST

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    On 1 Feb 2009, at 20:06, Behnam wrote:

    > To give you a vague idea (as vague as mine) imagine the black keys
    > on the piano are joined to the white keys (half tones) and quarter
    > tones on top of it.

    Though one does not agree on the exact tuning, one agrees they are not
    exact E12 quarter tones, but lowered a bit, and traditionally the
    Pythagorean tuning (or E53) which in itself causes the keys become
    split, as on Renaissance keyboards - the minor (resp. major) second is
    4 (resp. 9) commas (E53 tonesteps); so two half-tones is one comma
    short of a whole tone.

    Farhat's values gives interpreted into E53: koron lowering 3 commas
    and sori raising 2 commas. One can reinterpret it (see LilyPond User
    list) into E36: E12 where koron lowers 2/3 semitones and sori raises
    1/3 semitone.

    LilyPond now has the capability to typeset these, if one can get hold
    of glyphs, and produce correctly tuned MIDI files.


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