Re: polyphony in tablature

[Marc Hohl]

Neil Puttock schrieb:
> 2009/8/19 Marc Hohl <address@hidden>:
>
>   
> > Carl, do you have any hints where to start such an enhancement?
> >     
>
> If you search for `separator' you should find the code which splits
> the music into voices.  It will have a context-spec-music block which
> will need amending to use Bottom rather than Voice to ensure the split
> music is created in the default child context of the Staff-level
> context.
>
>   
Neil, thanks for your hint!
I searched and found the following definition in scm/music-functions.scm:

(define (voicify-list lst number)
 "Make a list of Musics.

  voicify-list :: [ [Music ] ] -> number -> [Music]
  LST is a list music-lists.

  NUMBER is 0-base, i.e. Voice=1 (upstems) has number 0.
"
 (if (null? lst)
     '()
     (cons (context-spec-music
        (make-sequential-music
         (list (make-voice-props-set number)
           (make-simultaneous-music (car lst))))
        'Bottom  (number->string (1+ number))) ;; 'Voice changed to 
'Bottom here
       (voicify-list (cdr lst) (1+ number)))))

As you proposed, I changed 'Voice to 'Bottom, and everything seems to 
work without problems!
I can't believe it's just that simple. Should this become default, i.e. 
should I create a patch?
Or are there some caveats I simply do not see now?

This would imply that parts of the documentation have to be 
changed/simplified, for example
the drum notation part Mats referred to in his mail:

http://lilypond.org/doc/v2.13/Documentation/user/lilypond/Common-notation-for-percussion#Percussion-staves

Thanks


Marc
> Regards,
> Neil
>
>