The Xone:23C implements two routing options for USB Return (input) channels;
Default configuration enables routing of the main mix signal output for recording, and the FX bus for use with software VST type FX plugins.
Internal links can be used to re-configure the USB inputs for use with compatible applications supporting DVS (timecode vinyl)
DEFULT CONFIGURATION (WITHOUT DVS LINKS)
Soundcard Return channel 1 = Record Out L
Soundcard Return channel 2 = Record Out R
Soundcard Return channel 3 = FX Return L
Soundcard Return channel 4 = FX Return R
WITH DVS LINK OPTIONS FITTED
Soundcard Return channel 1 = Phono deck A - DVS input L
Soundcard Return channel 2 = Phono deck A - DVS input R
Soundcard Return channel 3 = Phono deck B - DVS input L
Soundcard Return channel 4 = Phono deck B - DVS input R
Please refer to p.19 and p.23 of the Xone:23C User Guide for details