Pioneer Dj DDJ-FLX4 Portable 2-Channel rekordbox DJ and Serato Controller (Graphite) - Manual (Page 161)

Additional information
161
En
Using the unit as a controller for other DJ
applications
The unit also outputs operating data for the buttons and knobs in MIDI
format. If you connect a PC/Mac with a built-in MIDI-compatible DJ
application via the USB cable, you can control the DJ application with
the unit. (You need to set MIDI details in the DJ application.)
• For details, see your DJ application’s user guide.
About MIDI messages
For details on this unit’s MIDI messages, see the List of MIDI
Messages.
• You can find the List of MIDI Messages on the Pioneer DJ website:
pioneerdj.com/