Hi Peter I recently had the exact problem, sound server would play CD's but no wav or mp3s, except mine was on SUSE. I orginally had ALSA and tried to set up the config file, didn't work. I next tried to install and configure OSS, that didn't work. I went to ---> http://sdb.suse.de/en/sdb/html/thallma_alsaup_80.html and downloaded the rpms for ALSA and ALSA driver followed instructions and now have sound! I'm thinking (I don't know) the rpms and install instructions would work for you on Mdk 9.0 if you wanted ALSA as your sound set up. Hope this helps - Pete On Thursday 07 November 2002 01:02 pm, Thomas T. Veldhouse wrote: >> Perhaps it is muted. If you are using the ALSA drivers (I am not too >> familiar with MDK to say whether they use them or not), but they default to >> muted. > > No, I checked that--I opened kmix, cranked the volume up on just about everything, and still didn't get any sound. Here's the weird part: if I pop in an audio CD, I can play that just fine. But if I want to play an mp3, wav, or other audio file, it doesn't work. Furthermore, when I restart arts, I get the '/dev/dsp busy, using null device' message. This is true for both root and an ordinary user. I tried to see if Knoppix would behave, but it gives a device error; I don't have it loaded now, but it was something like, '/usr/lib/...path_to_kernel_module/via_ac97.o device not found' or something like that. In other words, Knoppix was able to detect the sound card--otherwise how could it have known that it requires the via_ac97 (or whatever it is) kernel module--but when the kernel module attempted to access the device, it didn't work. This is rather perplexing. The system detects the sound card, lsmod shows a slew of drivers for ac97, so drivers are getting loaded, but it doesn't work. I don't think there are any IRQ conflicts, since lsmod shows it as IRQ 18; what are some ways I could find out if it is a hardware problem or a conflict with another device? :Peter --__--__--