You could approach the problem in three ways.
(1) Go to the sound card manufacture's website. (That is if you have internet working on linux)
See if they have linux drivers. If so install the driver on your linux machine. (I have Red Hat, so if the folders are the same, the drivers should be in /dev. Copy the drivers to the folder and reboot.
(2) Since Linux is free, get an updated version which might have the compatible software or drivers for your sound.
(3) Go to google and type in "linux" "drivers" "sound card", or some thing close to get other help.