Re: breaking chords with \autochange

[Urs Liska]

Am 18.12.2015 um 00:51 schrieb Gilberto Agostinho:
> Hi all,
>
> I created a simple function which helps handle chords when using
> \autochange, but although the function works great I get some warning
> messages. This is the code:
>
> \version "2.19.32"
>
> autochord = #(define-music-function
>      (parser location chordDown chordUp)
>      (ly:music? ly:music?)
>       #{
>         <<
>           {
>             \oneVoice \change Staff = "down" $chordDown 
>           }
>           \\
>           {
>             \oneVoice \change Staff = "up" $chordUp 
>           }
>         >>
>       #}
>      )
>
> \autochange {
>   c c 
>   \autochord   <d' f'>
>   c 
>   c'' c''
>   \autochord   <d' f'>
>   c''
> }
>
> It outputs 4 warning messages, two for each chord, like this one: warning:
> cannot find context to switch to \autochord   <d' f'>
>
> Am I doing something wrong here?

Yes.

Before discussing the warnings we should make clear what you actually
want to do.
Your function expects two arguments but your example code suggests you
give only one.
As it is the function reads <d' f'> as chordDown and "c" as chordUp -
and actually this is what the printed output looks like.

So what do you actually want?

Urs

>
> Cheers,
> Gilberto
>
>
>
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