https://www.amazon.com/Focusrite-Sca...y&sr=8-34&th=1
Like this product that claims to have 18 inputs, but I only see 8, or 12 if you count the combo jacks as 2 each. So where are the other inputs?
EDIT: So I see there is optical as well as S/PDIF and MIDI.
I guess maybe it's the 4 mic inputs, 4 line-in, 2 S/PDIF, 1 MIDI, and 7 optical.