source: https://www.w3.org/2021/06/musicxml40/musicxml-reference/elements/key-step/
MusicXML 4.0 >
MusicXML reference >
Elements >
key-step
Parent element:
<key>
Non-traditional key signatures are represented using a list of altered tones. The element indicates the pitch step to be altered, represented using the same names as in the element. The different element names indicate the different meaning of altering notes in a scale versus altering a sounding pitch.
step
None.
This element is used in the following examples:
, (Non-Traditional)