Is it possible to use the DDJ-SX2 as a general purpose MIDI controller and to operate MIDI-compatible DJ software other than Serato DJ?

Operation is possible. When using DDJ-SX2, pay attention to the following points.

(1) DDJ-SX2 automatically switches to the "mode optimized to Serato DJ" when Serato DJ is running and to the "general purpose MIDI controller mode" when Serato DJ is not running. Furthermore, the general purpose MIDI controller mode can be forcibly set in the utilities mode, regardless of whether or not Serato DJ is running. For details, see "Forcefully using the unit as the general MIDI controller" of the operating instructions.

(2) In order to operate the MIDI-compatible DJ software with DDJ-SX2, the various operating interfaces of DDJ-SX2 must be assigned to the various functions of the DJ software.

For details on assigning the interfaces, see your DJ software's operating instructions.