Figured Bass support

[David Stone]

I'm scratching my head about how to implement figured bass in abjad. 

I've tried using abjad.attach of Lilypond literals with the proper "\figures { ... }" type strings, which creates figures that seem to "push" the existing voice out of the way. How do I get the figures to align with existing bass notes?

[Martín Rincón Botero]

Hi David,

as far as I know figured bass is not yet implemented. You can fake it with LilyPondLiterals, but the corresponding context will remain empty, which means that you're not gonna be able to manipulate it (no appending, extending, etc.) and the resulting formatting of the lilypond file is not gonna be particularly pretty. This works for the simplest cases:

import abjad


def figured_bass(figures):
    context = abjad.Context(lilypond_type="FiguredBass")
    figures = abjad.LilyPondLiteral(r"\figuremode { " + figures + " }")
    abjad.attach(figures, context)
    return context
    

container = abjad.Container(simultaneous=True)
voice = abjad.Voice(r"\clef bass dis4 c d ais g fis", language="nederlands")
fig_bass = figured_bass(r"<6>4 <7\+>8 <6+ [_!]> <6>4 <6 5 [3+]> | <_>4 <6 5/>4")
container.extend([voice, fig_bass])

>>> print(abjad.lilypond(container))
<<
    \new Voice
    {
        \clef "bass"
        ds4
        c4
        d4
        as4
        g4
        fs4
    }
    \new FiguredBass
    {
        \figuremode { <6>4 <7\+>8 <6+ [_!]> <6>4 <6 5 [3+]> | <_>4 <6 5/>4 }
    }
>>
>>> abjad.show(container)

Cheers,

Martín.

Am Sa., 10. Sept. 2022 um 02:28 Uhr schrieb David Stone <da...@bergenstreetmusic.com>:

I'm scratching my head about how to implement figured bass in abjad. 

I've tried using abjad.attach of Lilypond literals with the proper "\figures { ... }" type strings, which creates figures that seem to "push" the existing voice out of the way. How do I get the figures to align with existing bass notes?

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