Korg KROSS Parameter Manual page 314

Appendices
To save the edited sound, execute "Write Program" or "Write
Combination."
Note: In Combination mode, only some parameters can be saved.
For information as to which a parameter can be saved, refer to the
explanation of each parameter.
Note: In Sequencer mode, the edited content cannot be saved.
Saving the edited content does not save the angle of the knobs; it
saves the edited state of the various parameters. When the data has
been written, the previously edited values will become the "new"
reference values, meaning that the saved sound will be reproduced
when the knobs are at the center position.
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