|I had one card and one built-in. When using a DJ software, I was able to play from one card and listen with the other through headphones.|
Adobe Audition will let you pick which sound card to use. Again, I could play from one card and do anything else with the other.
I guess it depends on the software. Windows Media Player won't let you pick a specific card without going into your sound properties and changing to the card you want.
What exactly did you want to do?
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