AUDIO 4 DJ – 40
10.3.5 Disable USB Energy Saving Mode (Windows only)
If the AUDIO 4 DJ is causing crashes or performing badly on a Windows machine, disable
power management to the USB hubs rst; XP turns this on by default.
To disable power management for USB hubs, open the device manager (Control Panel >
System > Hardware) and right-click a USB hub to bring up its properties. On the power
management page, uncheck all boxes. Repeat for each hub and reboot.
10.3.6 Update the Driver
Click on the AUDIO 4 DJ logo in the Settings Tool to check the driver version number
and verify that you are using the latest driver.
Check the Native Instruments website regularly for updates of the AUDIO 4 DJ driver.
10.4 How to avoid Ground Loops
Ground loops are a common problem within any environment where multiple electrical
devices are connected to the same power circuit. In complex setups the cause(s) of the
noise can be difcult to nd. Ground loops are perceived usually as a hum or buzz in
your audio signal, but this can also transmit and amplify other sounds from the devices
connected to the circuit. For example, one very common problem is that you hear internal
clicking sounds created by your computer.
The cause of the noise is usually the computer and its internal devices, or devices con-
nected to the computer like external hard drives. (Note that even if the power supply of
your notebook computer is not connected, your setup may still be vulnerable to ground
noise from an external device with its own power supply.) The cause can also be any other
device (such as a radio or television).
The reason why this noise is present at the monitor speakers input has to do with a loop
in the setup of your electrical and audio cable connections. Most likely this loop occurs
through the ground of one or more of these cables. With this in mind, the following points
should help to eliminate the ground loop.
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