SMuFL's horizontal approach to this is very sensible, given that it allows more flexibility in the length of the shape. Finale for example, copies a shape vertically by a fixed amount, demanding a vertical shape of a certain hight to give smooth overlaps between the wiggles.
> The wiggleArpeggiato glyphs all appear to be
horizontal rather than > vertical. Is this an error in the Bravura font, or do applications
need to > rotate them by 90 degrees, or am I missing something?