ALSA

Enable capture on all microphones.

#!/bin/bash

if [ $# -eq 1 ]
then
	amixer -c $1 sset Mic,0 cap
	amixer -c $1 sset Mic,0 100%
else
	echo "Please specify card number."
fi

To save ALSA configurations, execute:

sudo alsactl store 0

This should save configurations to the ALSA init file which gets loaded every startup.

Note: The PC must not be registering the input as an active audio source - i.e. audio input from the board should be disabled in general settings before trying to access the audio data in ODAS.