[arch-general] System Bootup and Shutdown Sounds

Hello Everyone, The canberra-system-bootup.service, canberra-system-shutdown.service and the canberra-system-shutdown-reboot.service from the libcanberra package [0.30-4] refer to several .oga files (like system-bootup.oga) which probably should have been present in the sound-theme-freedesktop package, but aren't there. Where can I find these files, or is this some kind of a bug. Regards, Ronnie.P.Thomas