[CM] ancient music

[Bill Schottstaedt]

> my friend Stephane, music teacher, needs symbols to write 
> scores from late XVe (1450-..): brevis, semi-brevis, maxima, etc. 
> 
> Is there a way to do that in CMN ? 

Not without some effort.  You'd need to write the postscript-like
code to draw those symbols -- it's not too hard, if I remember what
they look like.  cmn-glyphs.lisp has cmn's music font, and accent.lisp
has a bunch of simple shapes that might serve as examples.