The beta version of foobar2000 uses Directsound by default, which can cause some problems when playing music. In order to get the program to play music properly, you must set the Hardware Acceleration to emulate Directsound. Go to a terimal and type in "winecfg". A window will open with options for you to modify. Click on the Audio tab, and then look for "Hardware Acceleration". It is currently on "Full". Click on it, and you will have a list of options. Click on "Emulation", and then click on "Apply". foobar2000 should now be able to play music. Note that this will make foobar2000 version 0.8.3 give out an error when you try to play an audio file. Just change it back to "Full" in winecfg when you're done using foobar2000 version 0.9 beta.