By default, the operating system detects your audio card. The enumerators identify the card and use io-audio to start it.
Audio drivers in Neutrino are very simple to initialize. When you use io-audio, you can use the -d option to pass the driver:
io-audio -vv -d audiopc &
To see what other options you can use, see the documentation for io-audio in the Utilities Reference and for your specific card.
If the operating system doesn't detect your card properly, you can manually start the driver. In order to do this, you need to identify the card. You can find a list of currently supported hardware in the Community area of our website, http://www.qnx.com.