The 9-pin interface is for the breakout cable (supplied) for MIDI and digital signal
I/O...
if you want 4 inputs you might need the 1010 or similar but stay away
from the Audiophile 192, it is not supported. I plug a cheap Behringer
mixer into the stereo ins of the 2496 to get more inputs.
Dunno about microphones!
Norv
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