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Grant, |
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If you want to do a complete switch then you would change your USB |
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card to index 0 and restart Als which would make the USB card the |
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default since card 0 is always the default for Alsa. On the other |
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hand, if you wanted to just leave the onboard card as default and send |
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audio from a specific application to the USB card you would tell the |
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application to use hw:1 explicity, either in the command line when you |
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start the app or in an application's config file. On my system I let |
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all my web/browest audio go to the onboard sound card but I send all |
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my CD audio directly to my good card using Aqualung and configuring it |
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from the command line. (Actually in my launcher.) |
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|
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to the best of my knowledge there has never been a way to simply |
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switch sound cards on the fly in Alsa. I've requested this sometime |
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back but the developers haven't shown any interest. |
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|
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Hope this helps, |
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Mark |
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|
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On Sun, Feb 24, 2008 at 11:34 AM, Grant <emailgrant@×××××.com> wrote: |
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> > > I have a USB sound card and an internal sound card in my laptop. Is |
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> > > there a way to switch between them while the system is booted? 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 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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> |
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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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> |
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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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> |
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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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> |
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> |
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> > # Alsa 0.9.X kernel modules' configuration file. |
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> > # $Header: /var/cvsroot/gentoo-x86/media-sound/alsa-utils/files/alsa-modules.conf-rc,v |
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> > 1.4 2004/11/16 01:31:22 eradicator Exp $ |
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> > |
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> > # ALSA portion |
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> > alias char-major-116 snd |
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> > |
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> > # OSS/Free portion |
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> > alias char-major-14 soundcore |
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> > |
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> > ## ALSA portion |
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> > alias snd-card-0 snd-intel8x0 |
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> > options snd-intel8x0 index=0 |
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> > alias snd-card-1 snd-hdsp |
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> > options snd-hdsp index=1 |
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> > |
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> > ## OSS/Free portion |
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> > alias sound-slot-0 snd-card-0 |
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> > |
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> > |
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> > # OSS/Free portion - card #1 |
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> > alias sound-service-0-0 snd-mixer-oss |
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> > alias sound-service-0-1 snd-seq-oss |
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> > alias sound-service-0-3 snd-pcm-oss |
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> > alias sound-service-0-8 snd-seq-oss |
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> > alias sound-service-0-12 snd-pcm-oss |
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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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> > # Set this to the correct number of cards. |
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> > options snd cards_limit=2 |
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> > mark@lightning ~ $ |
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> -- |
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> |
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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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