Its mostly a breakoutbox for something thats already there. It makes Midi in and out accessable and gives you spdif in and out in optical and coaxial Form. It is wired with the card. It does not have its own DSP!! But it has some additional in and out Converters. It is not a separate Card. The "Aux2" for example shows up in the popup window in the src plugins. I don´t understand what you mean. Are you talking about the ProFX plugin? ADC stands for analog digital converter and is a device to turn an analog signal into a digital datastream. Not really, you just need to know where the stuff you need is.