Open Sound System is a set of device driver for accessing sound cards and other sound devices under various UNIX operating systems. OSS has been derived from the Linux Sound Driver. Under Linux it is considered legacy, replaced by ALSA. Under GNU/kFreeBSD it is the native sound system.
Open Sound System 4
OSS4 in Debian
OSS4 packages are present in Squeeze.
Test the sound config by running
http://citeseer.ist.psu.edu/328623.html : Open Sound System Programmer's Guide .