#!/bin/sh
echo
echo "Here are the sound cards found in this system.
You may set ALSA_CARD to either the card number of the card id.
Using the card id is preferable as it doesn't change." 
echo "number  id"
for i in /sys/class/sound/card*; do
	printf $i|sed "s/.*card//"
	printf "       "
	cat $i/id
done