I have no problem playing any sound files. The only sound issue I have is with Simutrans. I went to install sdl_mixer and found I do have libsdl_mixer1.2 installed, I assume it comes packaged with Mint 14.
Do you mean can I open up Simutrans and play the sound effect files manually? I haven't found any sound effect files but the midi files for music play fine with a media player and can be enabled in the game anyway. However I'm not sure about the location of the sound effect files and whether they're accessible to test directly with a player. I might try getting another pak and seeing if the sound will work with that. It would seem that as we know it occurs on 2 machines installed through the repository, either Mint is not handling it for some reason, or the repository has left out a component. Its hard to see how it could be my individual setup or hardware, but then I'm a distinct amateur on these things. Frankly I'm stumped.
Just to update the other basic looking pak that comes with simutrans from the repository has sound effects no problem if that helps pin down some package that I may be missing