On Fri, 20 Jul 2012 15:25:53 -0700, Thomas Morley 
<[email protected]> wrote:

I'm coming up now with the code below.

Testing it with different note-head-styles returns weird output or
log-warnings while using 'mensural, 'neomensural and 'petrucci.
A bug?

I can't read Scheme, but I think so.

           (ratio (/ (car stem-attach) (cdr stem-attach)))
           (y-coord (/ y-factor ratio)))

I don't know how the address or decrement registers affect things, but 
stem-attach is likely to contain zeros for note-head styles that are not 
slanted, or for stems that attach in the center.   In one of these two lines 
you are likely pushing a zero on the stack before your division.


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