[nst7]

The max I/O is 8 in, 8 out. Any combination of analog and digital. So for the inputs, you could have 4 analog, 2 spidf, and 2 adat, or 2 analog, 6 adat, etc.

For the outputs, the same thing applies. Although you can have up to 8 analog. But you still could decide to have 6 analog, and 2 adat, or some other combination of outputs, etc.

On outputs, you also have the hardwired Cue outputs for the headphones, which shows up as output 9-10 in Protools, and is available when the "Cue" button is pressed for the headphones.

As for the mixer function, it requires some kind of monitor path to be set up. It will not work if you don't have a monitor path of some kind set up.