source: https://www.w3.org/2021/06/musicxml40/musicxml-reference/elements/clef-octave-change/
MusicXML 4.0 >
MusicXML reference >
Elements >
clef-octave-change
Parent elements:
<clef>,
<part-clef>
The element is used for transposing clefs. A treble clef for tenors would have a value of -1.
integer
None.
This element is used in the following examples:
Bass Clef (Down Octave), Vocal Tenor Clef