After finaly finding a sounddriver for the Sonic Imapct card on sourcefourge I tried a make install20 in the aureal directory which should be appropiate after having a look at the soundchip.
The compiling and module installation failed after a long list of warnings. Unfortunatly the make procedure does not create a log file so I scripted the process on the bash. This script is attached to this inquiry, I hope no one blames me for this long listing, but I didn't know which part to exclude. Robert
Aureal.log
Description: application/unknown-content-type-log_auto_file