7 LP/HP Applies a High Pass/Low Pass Filter on the track (middle position is Off position) 8 EQ LOW Adjust the low (bass) frequencies 9 EQ MID Adjust the middle (mid) frequencies 10 EQ MID Adjust the high (tremble) frequencies 11 LEVEL Adjusts the audio level (gain). 12 VU METERS Shows the strength of each channel’s pre fader signal. 13 CH INPUT SWITCH Define the source of each Channel. Put the switchers to USB A or USB B position for software mixing. Please note that all these operations are hardware operated, but their movement is visible in VirtualDJ GUI.