Thanks to all who have replied so far. I haven't tried midi, so can't comment on that with my set-up. Music CDs play perfectly well. This is the first time I have had any sound problems with SuSE. I have done some more tests. I replaced 7.2 with a clean installation of 7.1 and all was OK. There were no error messages and the KDE desktop music was clean. Then I did an "upgrade", rather than a clean installation, from 7.1 to 7.2 and the faults came back. Finally I have done another clean installation, this time to lose 7.1 off the drive and get back to just a 7.2. That's where things stand at the moment. Looking at what is installed with YAST, it doesn't appear that OSS is installed, only ALSA. I did not compile anything. I just did a normal installation from the CDs which SuSE supplied. Cheers Keith