Re: Arabic music half flat accidental shape

[Hans Aberg]

On 8 Feb 2008, at 15:02, Reinhold Kainhofer wrote:

> Am Donnerstag, 17. Januar 2008 schrieb Hans Aberg:
> > > A
> > > half flat in Arabic music is displayed as a b but with a slash
> > > across (It is
> > > hard to describe the shape precisely). Is it possible to access  
> > > such a
> > > symbol, and if not, is it possible to add it in the future?
> >
> > Is this what they use on
> >    http://www.maqamworld.com/
>
> It seems to me that this is exactly the accidentals.flat.slash  
> character in
> Lilypond's feta font:
> http://lilypond.org/doc/v2.11/Documentation/user/lilypond/The-Feta- 
> font

Thanks. I just made a file for ARab maqam notation interpretation in  
36-ET.

The Turkish example in "Snippets", "Pitches", though seems wrong,  
because it divides the 12-TET whole tone into 9 parts, which leads to  
54-ET, whereas the notation in question refers to 53-ET: The major  
second M is divided into 9 parts, and the minor second m is divided  
into 4 parts, each part also called a "comma". So it gives 5M+2m = 53  
commas, in the full octave.

(This is just one of the n-ET approximations of the Pythagorean  
tuning which can be gotten by computing continued fraction  
convergents of log_2 3/2, which are
  0, 1, 1/2, 3/5 , 7/12, 24/41, 31/53, 179/306
where, for example 7/12 means that key 7 is a good approximation of  
the pure fifth 3/2 in 12-Et.)

  Hans Åberg