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DDJ-400 Troubleshooting (Mac)

Before trying any of these steps, it may be worth a simple reboot of your computer. Unplug the DDJ-400 before you start.

1. Check that the computer recognizes it as a USB device

  1. With the unit powered-on and connected via USB, open the System Report by click the Apple icon > About this Mac > System Report.
  2. In the left pane, click Hardware (if not already open) > USB.
  3. On the right, look for the DDJ-400 and click it to see if the details are provided.
    DDJ-400-USB.png
    Not recognized? Try using a different USB cable and/or USB port on your Mac.

2. See if the OS recognizes it as a MIDI Device

  1. Open the Audio MIDI Setup app.
  2. Open the MIDI Studio window if it's not open; Window > Show MIDI Studio.
  3. See if the DDJ-400 appears in the window with a solid color.
    DDJ-400-MIDI.png
  4. If it does not appear or you feel this may be part of the problem, you can try creating a new MIDI Configuration.
  5. Click the drop-down (currently showing Pioneer DJ in the image above) and select New Configuration...
  6. Give the new configuration a name and click OK.
  7. The connected devices will be scanned and your DDJ-400 should appear.

3. Check the audio device

  1. Open the Audio MIDI Studio app.
  2. Open the Audio Devices window if it's not open; Window > Show Audio Devices.
  3. Verify that the DDJ-400appears as an audio device with a 0 ins / 4 outsconfiguration.
    DDJ-400-Audio.png

4. Ensure proper configuration within rekordbox

  1. Launch rekordbox and switch to Performance Mode if you are not already.
  2. Open the Preferences and see if the DDJ-400 is selected as the audio device.
  3. Scroll down and verify that the Master Output is set to DDJ-400 : MASTER and the Headphones Output is set to DDJ-400 : PHONES.
    DDJ-400-Config.png
  4. If you scroll to the bottom, you should also see the DDJ-400 listed beside Control Device Information.

5. Reset the rekordbox MIDI configuration

  1. If the rekordbox preferences are set correctly but you still have issue with control, verify that the rekordbox MIDI configuration hasn't been switched.
  2. On the main rekordbox window, click the MIDI button from the top bar.
  3. With DDJ-400 selected lick the DEFAULT button at the top right of the pop-open MIDI setting window.
    DDJ-400-Defaults.png
  4. You will be asked if you want to export the current settings, choose Yes (and save the file) or No (to discard changes), and the DDJ-400 MIDI defaults will be restored.
  5. Close the MIDI settingwindow.

6. Check Operation

  1. With a song playing on each channel, adjust the channel TRIM knob on the DDJ-400 until you see activity on the channel meter LEDs.
    DDJ-400-Trim.jpg
  2. Push each of the channel faders to the top, and adjust the master LEVEL knob so you have output on the master channel.
  3. Ensure that your output device volume is turned up to hear the incoming signal.

7. Headphone Cueing

  1. To hear the audio for any channel in your headphones, press the individual channel CUE button, and adjust the headphone MIXING knob to the far left.
  2. To hear the audio from the master, press the master CUE button, and adjust the headphone MIXING knob to the far right.
  3. To hear a mix of both sources, have one or more CUE buttons illuminated, and adjust the headphone MIXING knob as desired.
  4. The headphone LEVEL knob will adjust the volume on the headphone output.
    DDJ-400-Cueing.jpg
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