Hi. The DDJ 400 was made for Rekordbox and doesn’t work with Serato.

^^^ this

can't use serato with the 400

funny same as going into apple and saying my windows laptop wont run High sierra

Can use Serato DJ but need MIDI mapping first. Pioneer DJ website providing how to mapping.

I'm often left wondering if people actually research what they're buying at all.... Or just assume everything works with all software.

never underestimate peoples stupidity

Same like users buying an SX3 thinking it will run on Mountain Lion with a 2009 MacBook Pro🤣

give me a week or two i will be posting a xml with midi mapping for cdj 400 on serato dj pro and serato dj It wont be officially supported but will be working you will still need a serato dj license to use it it will be working like a controller i have most things working at the moment not complet yet i am using it with a akai amx as the mixer haven't had a chance to finish it you can also get most working with out my help by doing the mapping yourself on the midi mode everything but jogs wheels will program remember to set channel on cdj 400's prior to pulgng in usb to do so hold "text mode/utility mode" button use small nobe select midi set each to ch 1 or 2 must be different for each unless you only have one then you are good... jogs can be set up by watching this video Watchwww.youtube.com and replacing the inputs with the one given by the cdj-400 takes a lot of patients but can be done good luck next time research befor you buy

there is a document on pioneer dj website for midi settings, i have not used but not sure if it can help .

www.pioneerdj.com

kool thnxs hadn't looked for info there yet was using midi monitor to figure out what was what

thats ok , just thought i would share, i am also waiting on your xml , because i am clueless in how to do this .

thanks