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