Add support for U+1D106 and U+1D107 (musical symbol left|right repeat sign)

[gyuris]

I'm developing a tool for for Christian worship leaders to make chord sheets from XML using CSS. Currently I use previous version of Libertinus (Linux Libertine/Biolinum). I have to format repeating lines with musical repeat signs:

𝄆 Repeating line 𝄇

Would it be possible to support these two glyphs in Libertinus?

(I'm not a font designer, just a user. I made Opentype-Features.fodt)

[alerque]

Sure. I once had a use for them myself. However I can give you a heads up that it will be a little while before I can tackle this myself, and even a little (less) while before I could accept such a thing as a contribution if somebody else were to do it. I suggest setting up a character range match in your CSS and fallback to another font that supports this for those glyphs. It's a bit of a hack but I don't want to hold your project up.

Also if you know of another font that has these glyphs under a compatible license we could steal them from that would be a great foot forward.

[gyuris]

Thanks Caleb for responding!

Another fonts that support these glyphs:

• Vollkorn (SIL Open Font License)
• FreeSerif (GNU GPLv3)

[gitjeff2]

@gyuris I know you said you're using CSS, but have you considered handling this with LilyPond? I've never used it, but there is a MusicXML plugin that might meet your needs.

[alerque]

I've used LilyPond extensively too and love it¹, but it's more for sheet music than chords. Of course you can add cords to sheet music, but it's not great at just typesetting lyrics with chords. Personally I consider that lazy-music anyway, but my opinion doesn't count for much. I'm the guy that can't carry a tune in a dumptruck.

If CSS matching CSS to screen slides wasn't a requirement I'd say use SILE (maybe with the chordmode package, maybe just custom tags for handling MusicXML) for PDF output.;-)

_{¹ Also hate it because of the scheme-based syntax, but it's text based and hence versionable and gives great results, so that's a win overall.}

[gyuris]

Thanks @gitjeff2 and @alerque for your suggestions.

I use OpenLyrics with OpenLP for projecting songs and my goal is to provide chord sheets from OpenLyrics XML source files. I know about MusicXML and Lilypond but I think this is another task. I'm mostly done (sample). There are only such small details left as for example the correct display of repetitive signs. But I can live without them :smiley:.

[alerque]

@gyurls Thanks for the font finds. Having discovered this command to search for fonts that support specific codepoints:

$ fc-list ':charset=1D106 1D107'

... at least from the system I'm on now I'll add Bravura, Symbola, and Noto Music to the sampling. Here's what they each look like:

SILE Sample Code

$ sile sample.sil ```sile \begin[papersize=a6]{document} \nofolios\neverindent \begin{script} SILE.registerCommand("sample", function (options, _) SILE.call("font", { family = options.family }, { "𝄆 "..options.family.." 𝄇" }) SILE.call("break") end) \end{script} \font[size=30pt] \begin{raggedright} % \sample[family=Linux Libertine] % \sample[family=Linux Biolinum] \sample[family=Libertinus Serif] \sample[family=Libertinus Sans] \sample[family=Symbola] \sample[family=Vollkorn] \sample[family=FreeSerif] \sample[family=Bravura Text] \sample[family=Noto Music] \end{raggedright} \end{document} ```

[alerque]

Any preference as to the height of these glyphs relative to other text? Of the precedent I've looked at so far there seem to be two main options:

• from the baseline to ascender height (Symbola, FreeSerif) (or a little taller in the case of FreeSerif)
• from the descender height to ascender height or thereabouts (Volkorn, Bravura, Noto Music)

Here is some context with other dot and bar symbols:

SILE Sample Code

$ sile sample.sil ```sile \begin[papersize=a6]{document} \nofolios\neverindent \begin{script} SILE.registerCommand("sample", function (options, _) SILE.call("font", { family = options.family }, { "𝄆 "..options.family.." 𝄇", SILE.Commands["hfill"], "𝄆 -·|⋮.:fg: 𝄇" }) SILE.call("break") end) \end{script} \font[size=16pt] % \sample[family=Linux Libertine] % \sample[family=Linux Biolinum] \sample[family=Libertinus Serif] \sample[family=Libertinus Sans] \sample[family=Symbola] \sample[family=Vollkorn] \sample[family=FreeSerif] \sample[family=Bravura] \sample[family=Noto Music] \end{document} ```

My inclination so far is to go the latter route.

[gyuris]

Hi Caleb, thanks for dealing with this feature :smiley:. I do not have any preference for height of these glyphs. Choose what you prefer.