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Description
Describe the solution you'd like
Is the rendering of the note head modifiers circle, slash and backslash supported?
Additional context
for instance with
<note oct="4" pname="a" head.shape="x" head.mod="circle" dur="4" />
<note oct="4" pname="d" head.mod="backslash" dur="4" />
<note oct="4" pname="d" head.mod="slash" dur="4" />
we obtain
whereas the intended result would be (for the 2 first notes)