Re: Diatonic notation system

[Hans Aberg]

On 9 Dec 2008, at 13:26, Graham Breed wrote:

> > > No, because Lilypond also preserves the number of scale steps.  At
> > > least, it should.
> >
> > I attach what I wrote for E36. There seems to be two systems, but  
> > they keep
> > the ratio M/m = 2.
>
> Where are the transpositions?

I attach an example file.

I think it is the commented out part (long time ago), which for some  
reason only works with E24. Therefore, the keys must be written  
explicitly.

Let me know how to do E53.

> > > Yes.  That would be chromatic transposition.  I can't see a way to
> > > specify it in Lilypond.  So what does Lilypond actually do?
> >
> > Do not know.
>
> Then why are you asking for changes on the developer list?

I have not asked for changes, have I?

> > > > First compute the scale degree p + q, and compute the octave and  
> > > > note
> > > > name
> > > > by dividing by 7: octave is the fraction, remainder the note  
> > > > name. Then
> > > > subtract octave and note name from p m + q M; the result is of  
> > > > the form
> > > >  (-r)m + r M, where r if > 0 is the number of sharps, and if <  
> > > > 0, the
> > > > number
> > > > of flats is -r.
> > >
> > > Or it could do what it already does.
> >
> > So what does it do. Does it generalize?
>
> It records a nominal and a rational alteration.  It generalizes to
> different alterations.

But that is tied to E12, right?

> > > Yes, so change the init file.  Why are we going around in circles  
> > > here?
> >
> > Perhaps you are stuck to the same idea, and repeating.
>
> I'm stuck with that idea because it works.

In certain primitive settings.

> Then don't use E24 for Arabic music.

You already do.

  Hans

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