Thanks, nothing obvious there, although the PCM setting you have puzzles me (as shown in the script).

Anyway, thinking about your problem, the first thing that strikes me is the test sound works for you. That suggests that sound works as user root, but not as a regular user, which might mean a permission problem. To try and eliminate this possibility, can you add your self to group "audio"? Do this by going to:
YAST > Security and Users > User Management > select your user and then select "edit" > Details > and in the right under "groups" select audio. Then select "accept" .... etc ... Close Yast, and restart KDE (or Gnome). Does that help your sound?

I also notice there were some fixes to the Powermac audio driver in the update from alsa-1.0.14 to 1.0.15:
http://www.alsa-project.org/main/index.php...ermac&go=Go

So if the above permission fix does not work for you, then you could install the various alsa-1.0.15 packages. Unfortunately I could not find a PPC alsa-1.0.15, and you may be forced to compile. But lets cross that bridge when we come to it.