Re: Scheme in LilyPond

[Winston, Charles R.]

Totally makes sense. Thanks for the help!

Charles

> On Jun 1, 2017, at 11:29 AM, Jan-Peter Voigt <address@hidden> wrote:
> 
> Hi Charles,
> 
> the make-note-ev function is hidden inside a closure and therefore not 
> publicly visible. It depends on the duration defined in that closure. To 
> create NoteEvents you should create them like this:
> 
> (make-music 'NoteEvent 'pitch root 'duration some-duration)
> 
> where 'some-duration' is defined with a duration: (ly:make-duration 2) for a 
> quarter note.
> 
> The begin-define-sequence implies using 'let':
> 
> #(let ((root (ly:make-pitch 0 0 0))
>       (dur (ly:make-duration 2)))
>   (display (make-music 'NoteEvent 'pitch root 'duration dur)))
> 
> If there is a duration reachable in the scope you are acting, then you can 
> use that one like you found in the mentioned file and probably copy the 
> definition of make-note-ev.
> 
> HTH
> Jan-Peter
> 
> Am 01.06.2017 um 17:03 schrieb Charles Winston:
>> Hi,
>> I’m fooling around with using Scheme in lilypond files, making some way on 
>> my GSoC chords project. I’m trying to call the make-note-ev procedure found 
>> in scm/chord-entry.scm on line 196. I’ve written something simple:
>> #(begin
>>      (define root (ly:make-pitch 0 0 0))
>>      (display (make-note-ev root))
>> )
>> And I get an error saying that make-note-ev is an unbound variable. I 
>> thought that we could call Scheme procedures from the source in lilypond 
>> files. What am I missing here?
>> Thanks,
>> Charles
>> _______________________________________________
>> lilypond-devel mailing list
>> address@hidden
>> https://lists.gnu.org/mailman/listinfo/lilypond-devel
> 
> 
> _______________________________________________
> lilypond-devel mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/lilypond-devel