Operations on TRAKTOR are possible but no sound is output (the DDJ-T1 is not recognized as an audio device). The DDJ-T1 is recognized on the computer.

If multiple USB devices (mouse, keyboard, etc.) are connected to the same USB bus system on the computer or to a USB hub, TRAKTOR may not operate properly due to problems of the USB bus's band or compatibility between USB devices.

In this case, the problem can sometimes be solved by changing the connected USB port.