Ah, okay, I did not know that this is not the same for everyone.
So, my details: I am using the european Windows version of the netbook with Ubuntu 8.10 installed. As they did not offer Ubuntu with 16GB SSD
memory, I had to pay for Windows. In order to get sound management to work, I had to change the "alsa-base"-file.
I've upgraded the bios to version A02. I did not test this before the upgrade.
Now I proofed that I am also able to seperatly turn off the beeping (completely) by muting the ALSA mixer "Beep" of the device "HDA Intel"; with no other negative effect, the sound still works.