source: README @ 4068ed9

So, you want to develop gutenbach, eh?  Good!

Gutenbach is a distributed music player built on top of CUPs.  It
essentially enables anybody with access to it to play music from their
own computer -- all they have to do is "print" to the Gutenbach
instance as they would any other document!

The current Gutenbach features are:
    - the Gutenbach server (packaged as gutenbach-server)
    - a terminal queue display (packaged as gutenbach-queue)
    - remctl bindings (packaged as gutenbach-remctl)
    - client-side scripts to print to, list, and delete from 
      queues (packaged as gutenbach-client)
    - a Rhythmbox plugin
    - iTunes plugins
    - a webapp interface

All of these are located on GitHub:
http://github.com/jhamrick/gutenbach

In terms of how the repository is structured: after discussing the
possibility of supporting multiple systems, we decided it would be
best to merge everything platform unspecific into the master branch,
and then keep separate branches for each other system; e.g. at the
moment we have the debian branch, which should be the same as the
master branch except that it also contains a debian/ directory.  Now,
this means that you should never edit platform-unspecific files in the
debian directory; they should *always* be edited from the master
branch.  The debian branch should never be merged into the master
branch; merging should *always* happen the other way around.

See README.old for how Gutenbach /used/ to be installed.  This can
sometimes offer insight into how to fix things that are broken.

Questions or comments should be directed at gutenbach AT mit DOT edu.

NOTES:

- If you keep getting zephyrs with the following errors:

      Playback completed with the following errors:
      bt_audio_service_open: connect() failed: Connection refused (111)
      bt_audio_service_open: connect() failed: Connection refused (111)
      bt_audio_service_open: connect() failed: Connection refused (111)

  This is because you have alsa configured for bluetooth, but
  bluetooth is not enabled.  You should either enable bluetooth, or
  uninstall the bluez-alsa package.

- The commands to print and remove jobs should be used via the scripts
  in gutenbach-client package.  However, if you insist on using them,
  the correct syntax is:
      
      CUPS_SERVER=servername lp -dqueuename foo.mp3
      CUPS_SERVER=servername cancel [ID|-a] queuename

TODO: 

- include mixer and channel in debconf, or even better, move it to
  gutenbach-remctl and implement debconf in that package

- this should really not conflict with pulse (the biggest problem at
  the moment is that pulse will spew a bunch of errors like "Home
  directory /var/spool/cups/tmp not ours." I can't figure out how to
  get rid of them, but they're really annoying.  As long as pulse is
  in system mode, things seem to work otherwise.)

- CUPS issues

    * the CUPS daemon processes do not inherit groups from the lp user
      (so, for example, even if we add 'lp' to 'audio', the process
      will not be running in group 'audio').  For the time being, I've
      set the CUPS daemon to always run under group 'audio', but there
      should really be a better solution.

    * when the Purge-Jobs command is sent, the jobs are removed, but
      the current mplayer instance continues playing.  This
      unfortunately leads to jobs being played over each other when
      the CUPS server restarts

- Making it easier to use across multiple platforms, regardless of
  debathena/normal linux/etc?

- Gutenbach should not depend on Debathena -- ideally,
  gutenbach-server should be debathena free, and then if people want
  to use zephyr, etc., they can install an additional gutenbach-zephyr
  package or something

- add client scripts for the remctl package, something maybe like
  `gbvol [set|get] number`.  Or maybe just leave it with using remctl.

- fix the web interface

- Make it possible to play movies; i.e. add video support (the audio
  support is already there, obviously)