The instrument-sound element describes the default timbre of the score-instrument. This description is independent of a particular virtual or MIDI instrument specification and allows playback to be shared more easily between applications and libraries.
The
<instrument-sound>element.The instrument-sound element describes the default timbre of the score-instrument. This description is independent of a particular virtual or MIDI instrument specification and allows playback to be shared more easily between applications and libraries.
See
https://www.w3.org/2021/06/musicxml40/musicxml-reference/elements/instrument-sound/