David Kastrup <[email protected]> writes:
> James Worlton <[email protected]> writes:
>> I expect it to just output a scale with a double-stemmed g.
[slightly fixed code quoted]
>> \version "2.17.95"
>>
>> doubleStem =
>> #(define-music-function
>> (parser location note)
>> (ly:music?)
>> #{
>> << { \voiceOne $note } \new Voice { \voiceTwo $note } >> \oneVoice
>> #})
>>
>> melody = \relative c' {
>> c4 d e f
>> \doubleStem g a b c
>> }
>>
>> \score {
>> \new Staff \melody
>> }
>
>> I can work around this by adding \absolute before #note in the
>> function (and remembering to use absolute mode in the input), but it
>> would be nice if the function would produce the correct output. What
>> am I doing wrong?
>
> \relative is icky in this situation anyway: if you use \doubleStem g',
> you'll get a similar problem. There is the make-relative macro, but it
> only works on single pitches rather than whole music. Maybe I need to
> extend it.
See issue 3673. If that makes it in, you can do
doubleStem =
#(define-music-function
(parser location note)
(ly:music?)
(make-relative (note) note
#{
<< { \voiceOne $note } \new Voice { \voiceTwo $note } >> \oneVoice
#}))
and the behavior in- and outside of \relative will be just as you would
expect.
--
David Kastrup
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