On 29 June 2015 at 19:13, Thomas Morley <thomasmorle...@gmail.com> wrote:

> 2015-06-29 18:08 GMT+02:00 Ralf Mattes <r.mat...@mh-freiburg.de>:
> >
> > Just a question - is this an example drawn from a historic source?
> > What you call a "flat sign" would back then be called a "fa-sign" and
> > the corresponing "sharp sign" would be read as a "mi sign". Both "voces"
> > are independent of transposition, so "C♭" does _not_ denote a C flat
> > (ces) but rather a C-fa which is exactly what is needed in your example
> > in _both_ cases, so (in case this is not an original source) you might
> > better write 65♭ in the first, untransposed case.
> >
> > HTH Ralf Mattes
>
>
>
> I'd like to  second that, it's what I learned decades ago, iirc ;)
>
> See also the attached png from BWV 121
> Sorry for the bad resolution.
> (Although the right Hand is not Bach ofcourse.)
>
> The score can be downloaded at
>
> http://imslp.org/wiki/Christum_wir_sollen_loben_schon,_BWV_121_%28Bach,_Johann_Sebastian%29
>
> Cheers,
>   Harm
>

I will look at my (modern) harmony book to see what they use. I think for a
tierce de picardie chord in the key of Gm, they would use a Natural to
indicate the major third, and a Sharp to indicate the same interval in the
key of Dm.  However, that raises the important question of what an ABRSM
Theory examiner would do, if I used a flat sign to write a minor triad in a
chord where the major third is sharpened...

Another think -- in the example you give, is a natural sign only there to
"correct" a previous accidental on the figure? (otherwise, what else would
it mean?).

Thanks,
Chris
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