8 analog in (on XLR/TRS combo), 8 analog out (TRS), 16ch ADAT i/o, (2) instrument inputs, 26 simultaneous inputs, S/PDIF i/o (on fanout), word clock (on fanout), MIDI (on fanout), internal mixing, (2) headphone out. Compatible with Pro Tools M-Powered software. The 1/4" TRS part of the input combo connector bypasses the mic preamp and the gain knob.