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From: | David Nalesnik |
Subject: | Re: How to get the total length of Sequential Music |
Date: | Sun, 12 Oct 2014 18:26:34 -0500 |
David Nalesnik <david.nalesnik <at> gmail.com> writes:
>
> Hi Hans,
> On Sun, Oct 12, 2014 at 4:38 AM, Hans Sommer <hansisommer <at> gmx.de>
> _______________________________________________wrote:Hello,
> I am relatively new to Lilypond.
> I try to check the total length of a SequentialMusic part, i.e.
> my_score_part = { c'4 d e f }
> I want to get the result 4 quarters (or any other numerical representation)
> and for
> my_score_part2 = { c'4 d e f g8}
>
>
> (This isn't a valid name for a variable, so I changed it below.)
>
>
>
> should deliver 4 quarter and 1 eighth.
> I found in the documentation the property:
> length-callback (procedure):
> ly:music-sequence::cumulative-length-callback
> but I don't know how to use it.
> I would be very thankful, if anybody could provide an example.
>
>
> I'm not familiar with this property, but it's relatively easy to determine
the length of a music _expression_. Try this:
>
> \version "2.19.10"
>
> my_score_part = { c'4 d e f }
>
> my_score_part_two = { c'4 d e f g8 }
>
> #(display (ly:music-length my_score_part))
>
> #(display (ly:music-length my_score_part_two))
>
> Hope this is helpful,
> David
>
>
>
>
>
> lilypond-user mailing list
> lilypond-user <at> gnu.org
> https://lists.gnu.org/mailman/listinfo/lilypond-user
>
Thank you David,
that was what I was looking for.
When I use
#(display (ly:music-length my_score_part))
I get in the lilypond log file (depending on the score length) someting like
that:
#<Mom 2>
Is there a possibility to write the result in an extra text file (I want to
process the result by a program, that is actually starting the lilypond
compilation. It should check the score length and eventually throw an error).
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