Comment 1 for bug 1969634

This control toggles the sorting of the column specified by the integer argument.
So, if you bind this control directly in the xml it will fire both on press (1) and release (0), thus '0' will toggle the sorting of the Title column, '1' that of the Artist column.

https://manual.mixxx.org/2.4/en/chapters/appendix/mixxx_controls.html#control-[Library]-sort_column
https://manual.mixxx.org/2.4/en/chapters/appendix/mixxx_controls.html#control-[Library]-sort_column_toggle

FWIW I'd appreciate a control that toggles sorting of the column of the currently highlighted table cell.