source: https://www.w3.org/2021/06/musicxml40/musicxml-reference/elements/instruments/
MusicXML 4.0 >
MusicXML reference >
Elements >
instruments
Parent element:
<attributes>
The element is only used if more than one instrument is represented in the part (e.g., oboe I and II where they play together most of the time). If absent, a value of 1 is assumed.
nonNegativeInteger
None.
This element is used in the following examples:
Tutorial: Percussion