The first-fret type indicates which fret is shown in the top space of the frame; it is fret 1 if the element is not present. The optional text attribute indicates how this is represented in the fret diagram, while the location attribute indicates whether the text appears to the left or right of the frame.
The
<first-fret>element.The first-fret type indicates which fret is shown in the top space of the frame; it is fret 1 if the element is not present. The optional text attribute indicates how this is represented in the fret diagram, while the location attribute indicates whether the text appears to the left or right of the frame.
See
https://www.w3.org/2021/06/musicxml40/musicxml-reference/elements/first-fret/