Does CrossOver work with ALSA?
By default CrossOver interfaces with the Open Sound System (OSS). This default will also work if your Linux system is using the Advanced Linux Sound Architecture (ALSA) drivers and libraries, as long as the OSS compatibility mode is enabled. You can check whether your system is using ALSA by running the following command: cat /proc/asound/version. If you get an error then you are not using ALSA. Otherwise you will get the version of the ALSA driver and you can then check whether OSS compatibility is enabled by typing lsmod | grep oss. If you see modules called snd-pcm-oss and snd-mixer-oss then OSS compatibility is enabled. But you can also configure CrossOver to interface directly with ALSA 0.9 or greater. To do so, check out how to change the CrossOver sound backend. However note that ALSA 0.5 or older is not supported so in that case you must use the OSS compatibility mode.