Howdy

I am trying to change the default audio card from 0 to 1.
I have a piece of third party software which uses snd_pcm_open_preferred().

Reading the documentation for this function:
http://www.qnx.org.uk/developers/docs/6.4.1/neutrino/audio/libs/snd_pcm_open_preferred.html

It refers to a preferences file: /etc/system/config/audio/preferences however it does not define the format of this file
.

I would like to know how to use this file in order to have the call to snd_pcm_open_preferred() return a handle against 
the card 1 device 0.

Any help would be appreciated.

Adrian