Up to four CDJ-900s can be used simultaneously as the TRAKTOR series' audio output devices.

If you use a Windows computer, install the "Pioneer CDJ Driver" from the CD-ROM included with the CDJ-900 and set the CDJs as the output devices at the TRAKTOR series' audio setup. Also select "Pioneer CDJ ASIO" at [Audio Setup].

If you use a Mac computer, there is no need to install the driver, but to use multiple CDJs as audio output devices, you must create a "device set" at the "AUDIO MIDI Settings" included on the Mac and make the required settings.

For Mac OS X 10.5.X

With all the CDJs to be used connected by USB cable, launch "AUDIO MIDI Settings" in the Applications: Utilities folder.

From the "Audio" menu, select "Device Set Editor". Next, click [+] on the "Device Set Editor" screen and add a new device set.

Click the device set you have added to select it, then add the required number of CDJs to that device set.

Mac OS X 10.6.X

With all the CDJs to be used connected by USB cable, launch "AUDIO MIDI Settings" in the Applications: Utilities folder.

Click [+] on the "Audio Device" window and add a new device set.

Click the device set you have added to select it, then add the required number of CDJs to that device set.

After creating the device set, select the device set you have created at the TRAKTOR's audio setup.