On Sun, Feb 24, 2008 at 3:45 PM, Grant <[EMAIL PROTECTED]> wrote: > > > > > I have a USB sound card and an internal sound card in my laptop. > Is > > > > > there a way to switch between them while the system is booted? > Is > > > > > module loading/unloading via modprobe the best way to do it? > > > > > > > > > > - Grant > > > > > -- > > > > > gentoo-user@lists.gentoo.org mailing list > > > > > > > > > > > > > > > > > > Why switch between them when you can use them both at the same > time as > > > > hw:0 and hw:1? > > > > > > Thanks Mark. After studying your config, here is mine: > > > > > > alias snd-card-0 snd-hda-intel > > > options snd-hda-intel index=1 > > > options snd-hda-intel model=acer > > > > > > alias snd-card-1 snd-usb-audio > > > options snd-usb-audio index=0 > > > > > > alias sound-slot-0 snd-card-0 > > > alias sound-slot-1 snd-card-1 > > > > > > alias /dev/mixer snd-mixer-oss > > > alias /dev/dsp snd-pcm-oss > > > alias /dev/midi snd-seq-oss > > > > > > options snd cards_limit=2 > > > > > > I get sound from the USB card but not from the internal card > > > (snd-hda-intel). How can I tell the system to turn off the USB card > > > and turn on the internal card? > > > > > > - Grant > > > > > > > You might want to take a look at the new pulseaudio daemon. I don't use > > it but as far as I know it's perfect for complex setups like yours. > > Think of it as a (transparent, if necessary) layer between your > software > > and alsa. It should be easier to reconfigure than alsa. > > > > You could use it (or the older the older jack daemon) to send audio to > > both devices. > > Alright, but it seems like ALSA has some native support for multiple > cards. Does anyone have more than one sound card and the ability to > switch between them in native ALSA? > > I did a lot of search sometime back to get this solved... my blog entry on this is at the following link. http://defectivecompass.wordpress.com/2007/12/05/alsa-configuration/
I would also recommend you to take a look a pulseaudio (I have an entry for that on my blog as well). Hot switching of audio streams between devices is really cool! _r
