Re: Questions on ancient music

[Mats Bengtsson]

I answer the two last questions, and leave the rest to others.

   /Mats

Nancho Alvarez wrote:
> Hello!
> I have edited the  motet "o vos omnes" by the spanish composer Tomas 
> Luis de Victoria from XVI century:
> http://www.uma.es/grupovocal/ovos.ly
> http://www.uma.es/grupovocal/ovos.pdf
> you can see the original source in 
> http://tomasluisdevictoria.org/originales.html
>
> I used Pedro's lilypond-snapshot 2.4.1
> I would like to make some questions and comments:
...
>  
> 5-  Bug or feature?
>     In bar 62 of the cantus, there are two G sharp (it is the same music 
> than in bar 27), it happens because there is
>     a change of line. Is that normal?  I would prefer only one sharp 
> sign to be printed.

It seems that LilyPond adds an extra accidental if a note is tied over
a line break. I seem to remember a fairly long discussion on this
topic some year ago. I'm not sure if this is right or wrong, but
it clearly looks like a bug to me that the accidental is repeated
also on the second note in this case.

> 6-  Other usual notation in ancient music is a square bracket (similar 
> to the ligature) but with a dashed line, indicating that the original 
> source
>      has black notes. You can see an example in the original source of 
> the bassus part, corresponding to bar 22. I do not know exactly the meaning
>     of black notation, but good editions always mark it. As far as I 
> know, it is not possible to do it with lily, will this feature be 
> included in the future?

It's certainly possible, just set
\override LigatureBracket #'dash-fraction = #0.1
and use the ordinary ligature support.

  /Mats