Hello Andoru,
What version of pcsxr are you using? If you are on a 64bit system P.E.Op.S OSS plugin will not work it's only a 32bit plugin.
If your on a 32bit system you can install the oss driver or you can try using the alsa-oss compatibility layer by typing
aoss pcsxr
in a terminal that will get the sound to work will P.E.Op.S OSS plugin. For the configure window to show up you will need some libraries. Look this site for how to do that.
How to get the gui configure window for P.E.Op.S OSS to work
What version of pcsxr are you using? If you are on a 64bit system P.E.Op.S OSS plugin will not work it's only a 32bit plugin.
If your on a 32bit system you can install the oss driver or you can try using the alsa-oss compatibility layer by typing
aoss pcsxr
in a terminal that will get the sound to work will P.E.Op.S OSS plugin. For the configure window to show up you will need some libraries. Look this site for how to do that.
How to get the gui configure window for P.E.Op.S OSS to work