[ubuntu-uk] sound and software speech

[michaelweaver]

I have a soundcard in my PC which I know works with both sound and
speech under Windows so I can play a DVD while navigating it with my
screenreader as speech is produced through the soundcard.
How do I get multichannel sound using the same card in Ubuntu because at
some point I am hoping to go totally over to Linux when screenreader
access is better.
I am wondering if multichannel sound is only supported in Windows with
my soundcard.