I found an
old post from Dominions 2 times where JK even wrote about the sounds...

I think the only difference is that now most, if not all, of these files are at 6kHz instead of 22kHz, mono. The *.al files seem to be mono, to, thus at 22kHz. Does this coincide with what you found out, Ballbarian?
Sombre wanted the f_death.smp replaced with something else, too. If you manage to find a less shrieking death cry...