This repository contains the source for the audio mode config files that need
to be uploaded into the flash file system (FFS) of FreeCalypso GSM devices
under /aud, along with the necessary Makefiles that compile these sources into
the binaries that are actually uploaded into the FFS of FreeCalypso devices.

The *.cfg and *.vol files that are compiled from the sources in this repository
are uploaded into the FFS of FreeCalypso devices on the factory production line,
however, these configurations will inevitably receive updates after the hardware
devices for which they are intended have been produced and shipped, hence
empowered end users (i.e., the kind of end users for whom our devices are made)
need to be able to install updated versions of these audio configurations on
their own devices, as well as study the source and possibly make their own
changes.

You need to have a recent version of FreeCalypso host tools (fc-host-tools-r7
or later) installed on your host system before you can compile the binary *.cfg
and *.vol files from the sources in this repository.  Once you have these tools
installed, run 'make' to compile the *.cfg and *.vol files, then run
'make install' to have them installed in /opt/freecalypso/aud-* on your host
system.

Once you have up-to-date versions of the *.cfg and *.vol files compiled from
the present source installed on your host system under /opt/freecalypso, you
can then upload them into the FFS of actual FreeCalypso GSM devices with the
fc-fsio utility.  For example, to update the /aud/*.{cfg,vol} files on an
FCDEV3B board, execute the following command:

fc-fsio upload-subtree /opt/freecalypso/aud-fcdev3b /aud

Change the /opt/freecalypso/aud-* source directory accordingly for other
FreeCalypso device types.