What can I do by connecting this unit and a computer by USB?

You can perform DJing using DJ application and create and record tracks. This unit supports two interfaces: the "USB sound card" for the input/output of digital audio signals and a computer, and the "MIDI interface" that can control the operation of buttons and knobs of the unit from the computer.

1. The USB sound card enables input of the (digital) sound from DJ application on the computer to this unit.
2. The USB sound card also enables input of the (digital) sound from this unit to DJ application on the computer.
3. The MIDI interface enables control of DJ application on the computer by sending MIDI signals.