Re: Experiment with an Alternative Notation for learning Guitar music

[Paul Morris]

Philip Rhoades wrote
> OK, got that working - the actual music .ly "data" file is slimming down 
> now - but I still need to investigate why some notes needed manual 
> editing so they were in the right place when I converted a Mutopia file.

Hi Phil, If it was just changing the octave of certain notes, and those
notes were in the bass clef, then I think it is probably a matter of
adjusting the clef settings to fit your alternative notation system so that
notes in the bass clef land on the staff at the octave where you want them.  

Below is what I use in my include file for Clairnote (see
http://clairnote.org/software/).  It will probably take some adjusting of
the values so that it works for your system.

It modifies both the position of the clef on the staff and the position of
middle c relative to the clef (c0-position), and provides a function for
returning the clefs to their traditional values.

Cheers,
-Paul

% helper function for modifying clef settings
#(define (set-clefs treble-pos treble-c bass-pos bass-c alto-pos alto-c)
   ;; add-new-clef args:  clef-name  clef-glyph  clef-position  octavation 
c0-position
   (add-new-clef "treble" "clefs.G" treble-pos 0 treble-c)
   (add-new-clef "G" "clefs.G" treble-pos 0 treble-c)
   (add-new-clef "violin" "clefs.G" treble-pos 0 treble-c)
   (add-new-clef "bass" "clefs.F" bass-pos 0 bass-c)
   (add-new-clef "F" "clefs.F" bass-pos 0 bass-c)
   (add-new-clef "alto" "clefs.C" alto-pos 0 alto-c)
   (add-new-clef "C" "clefs.C" alto-pos 0 alto-c))

% set (or reset) clef settings for clairnote
#(define (set-clairnote-clefs)
   (let* ((treble-pos -5)
          (treble-c (- -12 treble-pos))
          (bass-pos 5)
          (bass-c (- 12 bass-pos))
          (alto-pos 0)
          (alto-c (- 0 alto-pos)))
     (set-clefs 
      treble-pos treble-c 
      bass-pos bass-c 
      alto-pos alto-c)))

% automatically modify clef settings when this file is included
#(set-clairnote-clefs)

% use this function to reset clefs back to traditional settings
% if you want to include music in both traditional notation 
% and Clairnote in the same file (i.e. for comparison)
#(define (set-traditional-clefs)
   (let* ((treble-pos -2)
          (treble-c -4)
          (bass-pos 2)
          (bass-c 4)
          (alto-pos 0)
          (alto-c 0))
     (set-clefs 
      treble-pos treble-c 
      bass-pos bass-c 
      alto-pos alto-c)))


P.S. David Kastrup is one of the main LilyPond developers and he has made a
lot of really nice improvements in the last few years that, among other
things, make it much easier to use Scheme with LilyPond.  




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