Audio driver installation does not require you to install video card. But you need to see what you're doing to install it so minimum requirement for a PC. You should have built-in graphics chip to connect you monitor, so if you have this then you can install your audio driver.
First thing first what computer and model do you have, and what is your operating system?
1 - Start
2 - Click run and enter the word " dxdiag " then enter
3 - click sound 1, sound 2, sound 3 if there's more than 1
4 - right down the name of speaker of the device
5 - post back the name of the device