Please quote the same direction we all read...
http://wiki.ursine.ca/Best_Online_Quoting_Practices
Your friend is either stupid or needs to put down the water-bong.
How else is a piece of electronics supposed to hear anything without
a microphone? Telephones, radio transmitters, tape recorders, and
every electronic device that needs to hear what is going on since the
dawn of machine-reproduced sound must have a microphone of some kind.
Without a microphone, electronics are as deaf as rocks.
Need to look at your sound mixer and make sure the Microphone In
volume is not muted and that your microphone is plugged in.