These programs ("mike" and "speaker") are used by the "netfone.tcl" 
GroupKit conference.  If you want to try it out, compile up mike
and speaker.  The netfone conference assumes speaker is already
running (i.e. started at boot time or whatever) and starts and stops
the mike program.  If mike isn't in your path, alter the script mike.csh
in the gk_library directory to point to it.

The original README for this program is below.

-------------

                               NetFone
                Voice Communication Over Data Networks

                            by John Walker
                 Revision 2  --  12th September 1991

The  phone  company never gives you a break!  You finally spring for a
leased line so you can be right on the network  with  everybody  else,
and you *still* have to pay every time you want to chat with somebody,
even though you're both sitting in front of SPARCStations with digital
audio capability, linked with a high-bandwidth network.

NetFone  uses  the  workstation  audio  chip  and  network  to   allow
bidirectional  conversations  right  over  the  network.  Workstations
linked by Ethernet can  generally  communicate  with  excellent  audio
quality  and response.  Those linked by 56 Kb lines can also talk over
the network, but with lower fidelity compressed audio that fits within
the capacity of the data link.

Complete instructions for building, installing, and using NetFone  are
given  in the manual page, netfone.1.  You can view the manual page on
your screen with the command:

    make manpage

Building NetFone requires the audio library, "libaudio.a", supplied by
Sun  in  SunOS 4.1.1 in /usr/demo/SOUND and the include files found in
/usr/demo/SOUND/multimedia.  These  files  will  be  present  on  your
workstation only if the "Demos" installation option was selected.  The
multimedia support files from Sun appear to be in  a  rapid  state  of
flux  and  you may need to change the directory names from which these
files are accessed in the Makefile and/or adapt the source programs to
accommodate changes made by Sun in subsequent versions of SunOS.

This program is in the public domain: "Do what thou wilt shall be  the
whole  of  the  law".   I'd  appreciate receiving any bug fixes and/or
enhancements,  which  I'll  incorporate  in  future  versions  of  the
program.   Please leave the original attribution information intact so
that credit and blame may be properly apportioned.

AUTHOR
            John Walker
            Autodesk SA
            Avenue des Champs-Montants 14b
            CH-2074 MARIN
            Suisse/Schweiz/Svizzera/Svizra/Switzerland
            Usenet: kelvin@Autodesk.com
            Fax:    038/33 88 15
            Voice:  038/33 76 33
