The <elevation> element.
<elevation>
The elevation and pan elements allow placing of sound in a 3-D space relative to the listener. Both are expressed in degrees ranging from -180 to 180. For elevation, 0 is level with the listener, 90 is directly above, and -90 is directly below.
https://www.w3.org/2021/06/musicxml40/musicxml-reference/elements/elevation/
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The
<elevation>element.The elevation and pan elements allow placing of sound in a 3-D space relative to the listener. Both are expressed in degrees ranging from -180 to 180. For elevation, 0 is level with the listener, 90 is directly above, and -90 is directly below.
See
https://www.w3.org/2021/06/musicxml40/musicxml-reference/elements/elevation/