Dvs issue

Mac or PC?

Mac

Did you allow rekordbox access to the mic (input audio)? Open System Preferences > Security & Privacy > Privacy > Microphone (on the left), and tick the box beside rekordbox on the right.

Question I just confirmed that I need a subscription with Rekordbox 6 for DVS although your Plan outline on the plan page for Rekordbox 6 page you state in the column
Free > With Hardware Unlock device
DVS > Hardware Unlock devices only *2

So I accept I need to pay for DVS.
I'm currently testing the free version but I too do not see the signal coming from DVS should I or do we need to upgrade to paid version to even see the test signal? 

I know my DVS works with no changes to my DDJ 1000 I flipped over to Rekordbox 5.8.5 and DVS works fine but when in 6.0 I get no signal from the control vinyl.

You likely paid for the DVS plus-pack in 5, but it's a paid upgrade to the Core or Creative plan in 6.

From this page:

You can see the DVS control has a check, which indicates a paid plan, but DJ control is free with the hardware.