On 21/06/2024 17:36, Kieren MacMillan wrote:
Hi Lukas!
All right… already back for more specific help.
I struggled with map-some-music, and failed. Scanned through Jean’s [amazing]
“Extending” docs — yes, yes, I need to RTM on that one, page-by-page! — and
found an example with music-map, so tried that instead. Also failed.
Your lambda function for the mapping returns the value of ly:message,
which is #<unspecified>. You need to return some music. Changing the
lambda function to
(lambda (m) (ly:message "Pitch is: ~a" (ly:music-property m 'pitch)) m)
maps the music to itself without any changes.
--
Timothy Lanfear, Bristol, UK.
