Re: Automatically transforming a FiguredBass line into a sequence of chords ?
The fundamental problem you will hit here is that a figured bass is
ambiguous, it only hints at the harmonic sequence, you have to make
judgements about how frequently the chords should be changing, and where
"obvious" changes have been omitted. (So an artificial intelligence
approach would be needed to do it by computer).
FWIW there is a set of Figured Bass exercises by Handel which I've
packaged with Denemo - you can play the chords and they are installed on
a staff above the bass notes. You can use this "Play Chords over Bass"
command for any score - I've used this to provide a guide realization
for accompanists who don't read from the figured bass directly. Then you
can take the LilyPond output for that staff. But you do have to be able
to play from the figures yourself for this, albeit as slowly as you like
- it waits for you to play the bass note before listening for the
chord(s).
Richard
On Mon, 2015-11-23 at 23:56 +0100, Michael Gerdau wrote:
> Hi list,
>
> does someone know of a function or snipped that automatically transforms
> some music together with a FigruedBass line into a sequence of chords
> like illustrated in the example below ?
>
> %%%
> \version "2.19.31"
>
> bcMusic = \relative {
> c2 c | c c | c c | c c |
> }
>
> bcFigures = \figuremode {
> \override Staff.BassFigureAlignmentPositioning #'direction = #DOWN
> \bassFigureExtendersOn
> \set figuredBassPlusDirection = #RIGHT
> \set figuredBassAlterationDirection = #RIGHT
> <5 3>2 <5 3> | <6 5+ 2>4 <6 4! 2> <6 4! 2>2 | <6\! 5> <6 5> |
> <9 4>4 <8 3>4 <8 3>2
> }
>
> \markup { "Is there a function that transforms this FiguredBass line..." }
> <<
> \new Staff {
> \clef bass \bcMusic
> }
> \new FiguredBass \bcFigures
> >>
>
> result = \relative {
> 2 | 4 2 |
> | 4 2 |
> }
>
> \markup { "...automatically into this sequence of chords ?" }
> \new Staff { \clef bass \result }
>
> \markup { "(hoping I got it right manually :)" }
>
> %%%
>
> Kind regards,
> Michael
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Automatically transforming a FiguredBass line into a sequence of chords ?
Hi list,
does someone know of a function or snipped that automatically transforms
some music together with a FigruedBass line into a sequence of chords
like illustrated in the example below ?
%%%
\version "2.19.31"
bcMusic = \relative {
c2 c | c c | c c | c c |
}
bcFigures = \figuremode {
\override Staff.BassFigureAlignmentPositioning #'direction = #DOWN
\bassFigureExtendersOn
\set figuredBassPlusDirection = #RIGHT
\set figuredBassAlterationDirection = #RIGHT
<5 3>2 <5 3> | <6 5+ 2>4 <6 4! 2> <6 4! 2>2 | <6\! 5> <6 5> |
<9 4>4 <8 3>4 <8 3>2
}
\markup { "Is there a function that transforms this FiguredBass line..." }
<<
\new Staff {
\clef bass \bcMusic
}
\new FiguredBass \bcFigures
>>
result = \relative {
2 | 4 2 |
| 4 2 |
}
\markup { "...automatically into this sequence of chords ?" }
\new Staff { \clef bass \result }
\markup { "(hoping I got it right manually :)" }
%%%
Kind regards,
Michael
--
Michael Gerdau email: m...@qata.de
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Re: Automatically transforming a FiguredBass line into a sequence of chords ?
Am 23.11.2015 um 23:56 schrieb Michael Gerdau: Hi list, does someone know of a function or snipped that automatically transforms some music together with a FigruedBass line into a sequence of chords I once wanted to do that but I hadn’t enough time and automatic a correct right hand for a figured bass is really complex so I abandoned the project ... http://lists.gnu.org/archive/html/lilypond-user/2014-04/msg00168.html like illustrated in the example below ? Probably that’s much simpler that a totally correct and playable version. It seems like you don’t care about parallel fifths (m. 1 to 2) and don’t add notes that aren’t explicitely there (f. e. <6 5> like in m. 3 always means <6 5 3> so you would have to add an e). ___ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user
