On Thu, 2008-04-24 at 18:37 -0300, luis jure wrote:
> on my laptop sometimes i have to use the internal sound card and
> sometimes an external usb card.
>
> is there a "gentoo way" to make alsa automatically change the default
> audio device to the usb card when it's connected and active, and back
> to the internal card when it's not?
>
> best,
>
> lj

We had this several times in the past few months. You might want to look
at the list's archive on http://www.gmane.org/

Log story short: Yes, it's possible but not very nice. Better use a
sound daemon that was created for such purposes like Pulseaudio.