ANNOUNCE: CCFaudio -- Free Internet Audio Conference Application

ANNOUNCE: CCFaudio -- Free Internet Audio Conference Application

Post by Michael Hirsc » Fri, 29 May 1998 04:00:00

            Collaborative Computing Frameworks

                    Emory University
                    Atlanta, GA, USA
                       May 1998

Today is the first release of CCFaudio, our multi-party internet audio
conferencing application for Solaris/sparc, SGI, and Linux/Intel.

Read about it and get some screenshots at:

Download it in source or binary from:

What make CCFaudio any different from any other internet phone?

1) Multiparty -- CCFaudio support more than two users.  Any number can
   join a conference (though we haven't tested with more than 10).  

2) Mixing -- when two or more people speak CCFaudio mixes the voices
   intelligibly.  The number that can be mixes depends only on the
   speed of your CPU.  A 486-50 has no trouble mixing two voices.  Any
   Pentium should have no trouble with three simultaneous speakers.

3) Threading -- The gui runs in a separate thread, so fiddling with
   the controls does not interrupt the sound stream.

4) No MBONE needed -- Every other conferencing tool we've seen uses
   the MBONE for it's multicast, which is bad news if you aren't on
   the mbone.  CCFaudio does its own networking in a very efficient
   way.  One udp broadcast per LAN in a session followed by multicast
   on each LAN.

5) Ease of use -- All you need to know to join a conference is the
   name of the session and the name (or address) of the machine 1
   person is on.  If someone on your LAN is in the conference you only
   need the name of the session.  

6) CCFringer-- For even greater ease of use we provide CCFringer, a
   small address book, conference creator, inviter and receiver
   program to automatically invite people into a conference.

6) High fidelity -- CCFaudio has many user adjustable settings to
   control sound quality.  Compression, redundancy, silence detection,
   input/output volume and more are easily controlled with a point and
   click gui interface.  (There is even a -nogui switch for those
   without X windows.)  We find that even under bad network conditions
   CCFaudio is intelligible with up to 30% packet loss if you turn on

7) Source availability -- Teach yourself how to build an internet
   phone :)

Here is the README file from the distribution:

            Collaborative Computing Frameworks

                    Emory University
                    Atlanta, GA, USA
                       May 1998

    CCFaudio is the audio conferencing component of CCF, a software
system that supports collaborative, distributed, computer-based
problem solving in the natural sciences, business, government, and in
educational environments.  The goal of CCF is to evolve a virtual
environment for distributed computation that supports integrated human
AV communication, high performance heterogeneous computing and
distributed data management facilities.  CCF is a research project at
Emory University involving the Math/Computer Science and Chemistry


1) Retrieve the latest source distribution via anonymous ftp or the Web. pub/ccf

    CCF is distributed as a compressed (GZIP) tar file (e.g. CCF-0.99.tar.gz)
    that unpacks as a single source tree (./CCF) containing
    C and C++ source files and makefiles. The top-level Makefile
    creates architecture specific bin and lib subdirectories
    (e.g. bin/SunOS-5.6 and lib/IRIX-6.2).

    Binary distributions are available such as:


    You may wish to try installing the binaries before attempting a source
    build. Occasionally the binaries fail to execute properly due to version
    inconsistencies with dynamically linked libraries.

2) Unpack the distribution using the GNU gtar utility:

        gtar xzvf ccfaudio-src-980528.tar.gz

    (gtar is available at

    or if gtar is not available:

        gzip -dc ccfaudio-src-980528.tar.gz | tar xvf -

    (gzip is available at

    The latest distribution file is about 1M compressed, unpacks to 4M
    and expands to about 45M after compiling. This can be trimmed to about
    35M by running "make clean" after building to remove .o files.

    This will create the following files and directories:

        CCF/CCFaudio (Audio tool)
        CCF/CCFgui   (Gui library)
        CCF/bin      (initially empty)
        CCF/doc      (README files and other documentation)
        CCF/lib      (initially empty)

3) Build CCF for the current architecture:

    To build CCF, cd into the top-level directory and run make:

        make all

    CCF builds with standard Solaris, IRIX and GNU versions of make.
    This will create libraries and binaries for the current architecture.

    Building CCF requires access to the ANSI C and C++ compilers and
    utilities from the standard IRIX and Solaris development environments.

        Solaris: WorkShop 4.2
        IRIX: MIPSpro 7.2

    Building CCFringer additionally requires xforms and libXpm
        xforms  (
        libXpm  (get this at any sunsite mirror)

    Note that the makefiles contain compiler specific flags. The current
    distribution will NOT make properly in Solaris or IRIX with gcc
    and g++ without some modifications.

    If your X11 lib and include files are in non-standard locations you
    will need to modify the CCF makefiles to specify the new locations.
    The normal build process may generate makefile errors that are ignored
    (e.g. attempts to build directories that already exist) and a few
    compiler warnings.

    To restart a build after a failure:

        make all

    To remove intermediate files produced by the failed build

        make clean

    If you have difficulties, you may be able to build some subsystems
    properly by using the "-k" option to make.

4) If you wish to build for another architecture in the same source tree,
   access the source from a machine of the appropriate type and run make:

        make clean all

     If you do not clean before making, the build will fail trying to link
     .o files of the incorrect architecture from the previous build.


    Running CCFaudio is simple:
       ccfaudio -session <sessionname> [remote-host]
    so 'ccfaudio -session foo' starts a new conference called foo and
    'ccfaudio -session bar' joins the conference
    called bar running at the machine  See the
    file for more information.

    To run CCFringer, just execute 'ccfringer' with no arguments.
    Click on the resulting icon to launch a new session or answer a
    call.  See the file README.ringer for more information.


    When reporting bugs, problems, suggestions or contributions,
    please to send them to the


    This is alpha release 0.99 of CCF -- Collaborative
    Computing Frameworks.

    This software is provided as is with no warranty expressed
    or implied. We hope you find it useful, but we won't be held
    responsible for any damage that may occur from reading,
    compiling, installing, using, or even thinking about it.


    CCF is Copyright (C) 1996 by Emory University except for the
    code in directories GSM, LPC, LPC10 in the CCFaudio directory
    and is distributed under the terms of GNU General Public
    License (GPL) and the GNU Library General Public License (LPGL).
    The files COPYING and COPYING.LIB in each directory will tell
    exact licensing restrictions.

    This package is free software; you can redistribute it
    and/or modify it under the terms of the GNU General Public
    License as published by the Free Software Foundation; either
    version 2 of the license, or (at your option) any later version.


    CCF was created by Vaidy Sunderam, Injong Rhee,
    Alan Krantz, Shun Yan Cheung, Julie Sult,
    Soeren Olesen, Paul Gray, Phil Hutto, Sarah Chodrow,
    Michael Hirsch, Ted Goddard, Mic Grigni, N. Balaguru,
    Jim Nettles, Luigi Marzilli, Sue Onuschak, Scott Childs,
    Kevin Williams.

    The CCF project is sponsored by the U.S. National
    Science Foundation under the multidisciplinary challenges

    CCF currently supports three platforms: IRIX-6.2, SunOS-5.6,
    and SunOS-5.5.1. The SunOS-5.6 version is the most thoroughly

Michael D, Hirsch                       Work: (404) 727-4969
Emory University, Atlanta, GA 30322     FAX: (404) 727-5611

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