Add this to installer-script or at least readme.md
If there is no sound it needs to be setup:
Try issuing aplay on a wav file - if there is an errormessage about no sound card '0' try the following (new install of arch did this). The following libs needs to be installed for aplay to work:
sudo pacman -S alsa-utils alsa-firmware alsa-lib alsa-plugins
sudo modprobe snd-bcm2835
sudo amixer cset numid=3 1
sudo alsamixer (make sure bcm2835 is selected)
gpasswd -a jonasl audio