No you won't.  It is plug and play.
a USB headset would create the same test.
I wonder if the sound settings need to have the box unchecked to allow for 
the use of other audio devices?  It sounds like a very old card, that 
doesn't allow for multiple sounds.  I haven't seen one like that in maybe 6 
years.
I doubt if the screen reader is the problem.  Multiple sound sources is the 
problem.
The other thing you could do, is to turn off the system sounds and 
notifications.  I don't like doing that, but if the card can't handle 
multiple sounds, naturally the screen reader is the most important.
The other thing I like about using multiple cards, is it is much easier to 
understand your screen reader if its voice isn't coming out of the same 
speakers that play multi-media.
You will have a bit of tweeking to do to tell the screen readers to use the 
secondary sound card.  If you can type, one of us can walk you through that 
over the phone, or with remote access through window-eyes or jaws tandum, or 
system access's remote assistence feature.
John will have good ideas here to.  Multiple heads come up with better 
answers.


---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com