I have the same problem.
Previously on Ubuntu, I used to set up my external card named "audio" with this command:
asoundconf set-default-card Audio
On VL 5.9 RC2, the terminal replies to this command : "bash: asoundconf: command not found"
Another trick was to set priorities in this file : /etc/modprobe.d/alsa-base, but there is no file like that in this directory ! Where are the alsa modules set up ?
At last, how could I restart alsa on VL ? Here is what I do :
root:# /etc/init.d/alsa restart
bash: /etc/init.d/alsa: No such file or directory
Thanks for help !