13Before use Part names andfunctionsConnections BasicoperationsInstalling and setting upsupplied software USB settings Troubleshooting IndexSpecifications Signal system chartUSB settingsMIDI command input/outputThis unit is equipped with a USB MIDI command input/output function. This function enables the unit to control the DJ software in the computer, and lights the main unit display (LEDs).• If TRAKTOR LE 2/PRO 2 and Virtual DJ LE/PRO are used normally, there is no need to switch MIDI command settings or the MIDI channel. Doing so may cause undesired operation or no operation at all.Set when TRAKTOR LE 2/PRO 2 and Virtual DJ LE/PRO are customized for expanded operation, or when other DJ software is used.Range of CH1, CH5, CH9 and CH13• When DECK CHG. A is lit, it is enabledDECK CHG. A• When DECK A/C is lit, it is enabledDECK A/CMIDI channel assignmentMost of the controls in this device support the MIDI control function.Each control is assigned to a MIDI channel as shown in the following block.• The MIDI channel is made up of 4 channels.Range of CH2, CH6, CH10 and CH14• When DECK CHG. C is lit, it is enabledDECK CHG. C• When DECK A/C is lit, it is enabledDECK A/CRange of CH3, CH7, CH11 and CH15• When DECK CHG. B is lit, it is enabledDECK CHG. B• When DECK B/D is lit, it is enabledDECK B/DRange of CH4, CH8, CH12 and CH16• When DECK CHG. D is lit, it is enabledDECK CHG. D• When DECK B/D is lit, it is enabledDECK B/D