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Yes, the CDJ-800MK2's can play the timecode WAV signal (as an audio file burned to CD).
With the DJM-450 as your audio interface, and the DVS plus-pack activated, be sure you have selected the channel 1 & 2 outputs from the mixer as TIMECODE CD/LINE, as shown here in the setting utility for a DJM-900nexus:
The channel selector on the DJM should be set to the USB source for both channels.
