AUX SOURCE Use this switcher to select the source to be routed to the AUX Channel. Its signal will be routed to the Master Output. Set to USB to route the VirtualDJ Sampler to the Master Output. Set to LINE to route the audio signal of the external audio source, connected at the rear panel of the DJM-450 Set to AUX/RETURN to output the audio signal after processed from the USB Send FX Input (connected to the top USB port - not supported in VirtualDJ )
AUX LEVEL. Use this knob to adjust the level of the selected AUX Source. When the USB AUX Source is selected, the knob will adjust the Volume of the VirtualDJ Sampler.
MIC LEVEL. Use this knob to adjust the Input level of Microphone Inputs (connection at the rear panel).
MIC TONE. Use this knob to adjust the tone of the Microphone Input.