Re: How to get the total length of Sequential Music

[David Nalesnik]

Hi Hans,

On Sun, Oct 12, 2014 at 4:38 AM, Hans Sommer <address@hidden> 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