Get the initial offset of the articulation from the y value of the starting position.
This is required because the top/bottom text positions already have spacing applied to
provide a "visually pleasant" default position. However the y values provided from
the stavenote's top/bottom do not have any pre-applied spacing. This function
normalizes this asymmetry.
Get the initial offset of the articulation from the y value of the starting position. This is required because the top/bottom text positions already have spacing applied to provide a "visually pleasant" default position. However the y values provided from the stavenote's top/bottom do not have any pre-applied spacing. This function normalizes this asymmetry.