I found the following info for your card.:
Not all features on all models supported. On the VX, white noise on playback unless initialized in Windows first. One quirky (but permanent) workaround is to enable the old oss modules, specifically the 100% sound blaster compatible module (sb). You don't have to load the oss modules. The alsa module snd-ca0106 works fine somehow if the old sb module is compiled in the kernel as a module (no white noise).
You can try this.
Open a terminal and write:
On the window that will open, the first tab is audio. Change the "plugins" (output and input) to ALSA or to OSS. You can also experiment changing the "devices" options. See if that will help at all.