Repository for sound files.
Not used for anything unless you have some means of playing audio files;
an example appears in ~/.blackhome/control/themeName.sh (if you have specified
a sound utility in the ~/.blackhome/config/userSpec file).
Files should be specified by theme name, e.g. 'alpha.wav' or 'omega.mid', etc. Alternatively, change the name of the sound file specified in the themeName.sh file in .blackhome/control.