#!/bin/cat
#uniq without sorting:
awk '{a[$0]+=1; if (a[$0]<2)print}'
#send my mic to remote
arecord -f cd -t raw | oggenc - -r | ssh <remote> mplayer -
#and reverse
ssh <user>@<remotehost> 'arecord -f cd -t raw | oggenc - -r' | mplayer -