I compiled both VLC and Mplayer with alsa support, but none of those two work well with alsa When I try to use gmplayer with alsa it gives me the following error
I do get sound but the popup window with the error keeps coming up so I can't really watch a movie. I checked and /dev/mixer does exist (it's a symlink to /dev/sound/mixer). With VLC I don't get any error, not even in the shell. The program plays any file, but I just don't get any sound when using alsa. Both programs work with OSS (but I prefer to use alsa). It's not a permissions problem as the rootaccount has the same problem and all other programs work well with alsa. How can I solve this small problem?

have you tried alsaconfig ?

Yes I have Both Cedega and Crossover also do not work with alsa. I found some info on this and apparently wine has some problems with the dmix plugin (which I use) in recent alsa versions. I tested it and I think the same problem occurs with VLC, 'cause I do get sound through alsa when I disable the dmix plugin. So for those programs I will just have to wait for an update But then there is still the error I get with MPlayer Could somebody help me on this one?

I have the same problem. There is something wrong with gmplayer (GUI of mplayer) in MPlayer 1.0pre5. I guess this is the verison you are using.
There are few ways to bypass the problem::
* use ESD as an audio driver in gmplayer
* use mplayer from command line
* use kplayer or kmplayer (KDE GUIs for mplayer)