Please, help me with my own music function creation.
How can I modify music object or create a new one with
existing music data and add sustain event to it?
If I understand correct, I must use make-music function and then use
(make-span-event 'SustainEvent START) call to generate sustain event .
Can anybody make short example, what such procedure must contain?
It is my furst music function and I have not any experience with it.
--
Do you know the \displayMusic function ? It is very useful, and i think it
is the base to start.
\displayMusic {a1 \sustainOn a \sustainOff }for example, will give you
scheme description
of music and allow you to understand how things work.
You see here that you have to add a
(make-music 'SustainEvent 'span-direction -1)
to the 'elements property of an 'EventChord event.
So the next step is to learn how to add an element to a list, with scheme.
You can go to the reference manual of GUILE.
http://www.gnu.org/software/guile/manual/guile.html
All about list is here :
http://www.gnu.org/software/guile/manual/guile.html#Lists
At end, you can read LSR, there is a lot examples doing things very close
that you want to do.
For example :
http://lsr.dsi.unimi.it/LSR/Item?id=82
Good luck.
Gilles
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