.TH listen 1 "20 November 1989"
.SH NAME
listen - hardware loopback, connect microphone to speaker
.SH SYNOPSIS
listen
.SH DESCRIPTION
Connects the microphone input to the speaker output in hardware, and
then goes to sleep.
Break the connection by interrupting the program.
.SH ENVIRONMENT
.nf
SST_RECORD - recording gain, from 0 to 99, default 75
SST_PLAY - playback gain, from 0 to 99, default 75
SST_EARPHONES - if set, send output to the earphone jack
.fi
.SH "SEE ALSO"
.SH AUTHOR
Copyright (C) 1989 by Jef Poskanzer.

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted, provided
that the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.  This software is provided "as is" without express or
implied warranty.