Native Instruments AUDIO 8 DJ Operation Manual page 54

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If the IRQ number listed next to any of these ports is sharing with other de-
vices in your system, you may have an IRQ conflict. In this case, physically
connect the AUDIO 8 DJ to another USB port.
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If this does not work, and your computer is a desktop machine, you may be
able to change the IRQ allocation from within the System BIOS (depending on
your motherboard). However, with most laptops it is not possible to change IRQ
allocation. You may need to reinstall your operating system for a better IRQ
configuration.
AUDIO 8 DJ – 5