New to Typophile? Accounts are free, and easy to set up.
I just find this old (1999) but still interesting essay about designing noteheads.
I will comment below when i will finish to read it.
I was thinking about a parametrical solution for noteheads, as it's one of the musical glyphs that fits the variables of stroke, direction and orientation. There's a little bit of math inside, hope to handle it....