Virus TI2 Desktop Audio Input question - I have a set of RCA's with RCA to 1/4 adapters, plugged into the 2 audio inputs on the TI2 Desktop, I've picked an input preset (clean) and changed the input mode to static and L/R. I still am unable to get any audio through the Virus? If I turn up the Noise oscillator and delays/reverb I can hear those coming through, just nothing from the input. I've tried researching this issue without any luck, any advice would be much appreciated 
(Soundcard ran out of inputs so I'm trying to leverage the Virus Inputs before buying an OctoPre or mixer lol)
Do the inputs only work if you're using the 1/4 analog outputs? Or should it be working when using the 3 USB Outputs via my DAW? I have tried this with 2 separate Virus synths that I have currently and neither seem to want to pass audio through.