Re: Intervalic Chord Names

[Jacques Menu Muzhic]

Hello Tom,

Do I guess it right that you’d like tonality-relative numbers, i.e. V7 for A7 
in D major?

JM

> Le 28 août 2018 à 16:27, Malte Meyn <address@hidden> a écrit :
> 
> 
> 
> Am 28.08.18 um 15:29 schrieb Tom Swan:
>> Sorry for duplication but my previous try didn't seem to go through.)
> 
> It came through; it just seems like it was overlooked by many.
> 
>> I need some help figuring out how to change chord names (C, F, G) into 
>> intervals such as (I, IV, V). The short example below displays a timing 
>> diagram for a melodic line, but I would also like to display the chords C7, 
>> F7 as generic intervals I7 IV7. Manually setting the text would okay -- I'm 
>> not looking for some kind of automatic translation, although that would be 
>> neat. I know I can do this with markup, but I do not want to add markup 
>> statements to noteValues! Do I need to set chordRootNamer somehow? Or is 
>> there another solution? Thanks for any advice.
> 
> Setting chordRootNamer probably is the easiest way, yes. I took the original 
> definition of note-name->markup (which is the default chordRootNamer) from 
> the file scm/chord-name.scm and modified it to use the roman numerals I to 
> VII instead of letters C to B:
> 
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> \layout {
>  \context {
>    \ChordNames
>    chordRootNamer =
>    #(lambda (pitch lowercase?)
>       (make-simple-markup
>        (vector-ref #("I" "II" "III" "IV" "V" "VI" "VII")
>          (ly:pitch-notename pitch))))
>  }
> }
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> 
> Of course you can use that in a \with block instead of a layout-context 
> block; or just \set chordRootNamer = … somewhere else ;)
> 
> Do you need lowercase numbers (i to vii) too? And how about accidentals?
> 
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