The .wavjammer card requires three drivers -- msopl.drv , mssndsys.drv , and mssndsys.vxd -- that are sometimes not available because (for mysterious reasons) they were not installed as part of Windows 95 or 98. It took me almost *forever* to find them. Here all three of them are, in one zip file. Good luck with your Wave Jammer install!
The following files are found inside the driver download file.
|MSSNDSYS.VXD||32.0 KB||15 Feb 2000|
|MSSNDSYS.DRV||40.8 KB||15 Feb 2000|
|MSOPL.DRV||18.0 KB||14 Feb 2000|