> 1. how one can give more space to an object; 
> writing a vocal part, sometimes the syllable is too long for the space 
> owned by the note [cut the syllable is not the best solution :-] 

The file lyrics.lisp has code to do this via the spacing hook.  You can 
touch up individual notes with the "walls" method:

  (f4 h (walls '(0.0 2.0)))

which forces that note to have a lot of trailing space.


> 2. I wish to get the vocal parts without automatic beaming 
> (but (automatic-beams nil) works only if I write it in the 
> outer section (cmn (automatic-beams nil) ...) 

Here's one way: 

(defvar always-no-beam
    (make-self-acting  
     :action #'(lambda (staff &rest rest) 
                 (declare (ignore rest))
                 (loop for obj in (staff-data staff) do 
                   (if (or (note-p obj) (chord-p obj)) 
                       (progn
                         (push :no-beam (store-data obj))
                         (setf (beamed obj) #'(lambda (&rest rest)
                                                (declare (ignore rest))
                                                0))))))
     :argument nil))

Then on the vocal staves add always-no-beam at the start:

  (staff always-no-beam brace bar bass (key f-major) (meter 3 4) ...)


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