cd <PS_install_dir>/libs/ln -s /usr/lib/libasound.so.2 libasound.so.2
The latest version includes an alsa driver, and it sometimes conflicts with ones already installed on your system. Go into the Planeshift install folder, then libs, and get rid of the libasound.so file. You may want to just cut and paste it somewhere in case this doesn't solve the issue, but I didn't have any sound at all, and doing this fixed it.