I have a DDJ-400 + a brand new Lenovo Thinkbook with decent specs (i7 11th gen + 16GB RAM) running Win 10 Pro. I have installed all pending Windows 10 updates. After Chrome, Rekordbox is the only other non-factory app I have installed on the machine.
I cannot control Rekordbox using the controller. When I plug in the DDJ-400, it lights up, and quickly goes to a mode where the 2x HOT CUE buttons are lit, and the Release FX is solid blue. No controls work (e.g. track scroll wheel, load decks, play/cue, etc). If I wait long enough, the controller eventually goes into its animated "screensaver mode".
Rekordbox does not appear as an audio/sound output device either. I cannot get sound to play through it.
In Rekordbox Preferences > Audio, I only see the default speakers ("Realtek(R) Audio") in the Audio drop-down. It is the only selectable entry in the list. It appears under the bold non-selectable "Windows Audio" heading. There is also a bold non-selectable "ASIO" heading in the list but no entries appear underneath it.
I have tried ALL USB ports, both 'regular' and USB-C options (USB-C with an adapter) with the same result. I have tried them with the laptop plugged into power as well. There are no other USB peripherals plugged in other than the DDJ-400.
I would have tried uninstalling Rekordbox but your uninstall feature is currently BROKEN and Rekordbox fails to uninstall via Windows add/remove programs (yes I closed it before trying). I have re-run the installer regardless. The DDJ-400 still fails to work.
I know that the issue is not with the DDJ-400 itself because I also have a Mac and the same DDJ-400 works fine there.
In Windows Device Manager, under "Audio inputs and outputs" I only see a Microphone Array and the system speakers (Speakers (Realtek(R) Audio)). If I look under Windows Settings, Sound > Output, the system speakers are the only option the computer knows about.
In Windows Device Manager, the "DDJ-400" does appear under "Sound, video and game controllers". It actually appears twice. Corresponding entries for "Intel Smart Sound Technology for USB Audio" also appear twice. If I unplug the DDJ-400 from USB, the entries for "DDJ-400" and "Intel Smart Sound Technology..." disappear.
I tried right-click + uninstalling all entries that appear twice ("DDJ-400" and "Intel Smart..."), unplugging the DDJ-400, opening Rekordbox, and re-plugging in the DDJ-400, and they re-appear in Device Manager. However the DDJ-400 is still not recognized as an audio output device.
I did some searching and can see that there are no specific drivers available for the DDJ-400 and that it should work via USB out of the box. That's clearly not the case. This is an otherwise completely new and virgin system.
Please advise, would love to get this working. The whole point of this laptop was a portable Rekordbox rig.