How to configure a default soundcard
Tony Moretti
intheday at gmail.com
Thu Aug 16 21:37:35 UTC 2007
kpfuser wrote:
> The need to configure a default sound card arose from the installation
> of an external USB sound card (Creative Sound Blaster Extigy) in a
> system that has an on-board sound card. Based on instructions in
>
> https://help.ubuntu.com/community/SoundTroubleshooting
>
> the shell command cat /proc/asound/modules returned
>
> 0 snd_intel8x0
> 1 snd_usb_audio
>
> showing that the on-board sound card was set as default automatically.
> Following a suggestion in
>
> https://help.ubuntu.com/community/DebuggingSoundProblems
>
> I disabled the on-board sound card using the BIOS setup trying to make
> the external sound card default. However, this failed as cat
> /proc/asound/modules now returns
>
> 1 snd_usb_audio
>
> To make the external sound card default, the first of the above listed
> documents suggests the following:
>
> *
> Now type sudo nano /etc/modprobe.d/alsa-base
> *
> At the very end of the file, add the following (assuming you
> have 3 cards with module names A, B and C and you want to have
> them in the order CAB
>
> options snd-C index=0
> options snd-A index=1
> options snd-B index=2
>
> I take this to mean that I should run the command sudo nano
> /etc/modprobe.d/alsa-base options snd-usb-audio index=0
> Is this correct?
>
> If it is, the output reads
>
> # autoloader aliases
> install sound-slot-0 /sbin/modprobe snd-card-0
> install sound-slot-1 /sbin/modprobe snd-card-1
> install sound-slot-2 /sbin/modprobe snd-card-2
> install sound-slot-3 /sbin/modprobe snd-card-3
> install sound-slot-4 /sbin/modprobe snd-card-4
> install sound-slot-5 /sbin/modprobe snd-card-5
> install sound-slot-6 /sbin/modprobe snd-card-6
> install sound-slot-7 /sbin/modprobe snd-card-7
>
> # Cause optional modules to be loaded above generic modules
> install snd /sbin/modprobe --ignore-install snd $CMDLINE_OPTS && {
> /sbin/modprobe -Qb snd-ioctl32 ; : ; }
> install snd-pcm /sbin/modprobe --ignore-install snd-pcm $CMDLINE_OPTS
> && { /sbin/modprobe -Qb snd-pcm-oss ; : ; }
> install snd-mixer /sbin/modprobe --ignore-install snd-mixer
> $CMDLINE_OPTS && { /sbin/modprobe --Qb snd-mixer-oss ; : ; }
> install snd-seq /sbin/modprobe --ignore-install snd-seq $CMDLINE_OPTS
> && { /sbin/modprobe -Qb snd-seq-midi ; /sbin/modprobe --quiet
> snd-seq-oss ; : ; }
>
> # Cause optional modules to be loaded above sound card driver modules
> install snd-emu10k1 /sbin/modprobe --ignore-install snd-emu10k1
> $CMDLINE_OPTS && { /sbin/modprobe -Qb snd-emu10k1-synth ; }
> install snd-via82xx /sbin/modprobe --ignore-install snd-via82xx
> $CMDLINE_OPTS && { /sbin/modprobe -Qb snd-seq ; }
>
> # Load saa7134-alsa instead of saa7134 (which gets dragged in by it
> anyway)
> install saa7134 /sbin/modprobe --ignore-install saa7134 $CMDLINE_OPTS
> && { /sbin/modprobe -Qb saa7134-alsa ; : ; }
>
> # Load snd-seq for devices that don't have hardware midi;
> # Ubuntu #26283, #43682, #56005; works around Ubuntu #34831 for
> # non-Creative Labs PCI hardware
> install snd /sbin/modprobe --ignore-install snd $CMDLINE_OPTS && {
> /sbin/modprobe -Qb snd-seq ; }
> # Prevent abnormal drivers from grabbing index 0
> options snd-bt87x index=-2
> options cx88-alsa index=-2
> options saa7134-alsa index=-2
> options snd-atiixp-modem index=-2
> options snd-intel8x0m index=-2
> options snd-via82xx-modem index=-2
> options snd-usb-audio index=-2
> options snd-usb-usx2y index=-2
> # Ubuntu #62691, enable MPU for snd-cmipci
> options snd-cmipci mpu_port=0x330 fm_port=0x388
>
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>
> [ Read 38 lines ]
> ^G Get Help ^O WriteOut ^R Read
> File ^Y Prev Page ^K Cut Text
> ^C Cur Pos
> ^X Exit ^J Justify ^W Where
> Is ^V Next Page ^U UnCut Text
> ^T To Spell
>
> This output leaves me utterly befuddled! What am I supposed to make
> out of it? Is it a sequence of shell commands I am supposed to run one
> after another, excluding those preceded by #? If not, how can I
> interpret this output and, most important, what am I supposed to do next?
>
> **
What you have here is the configuration file displayed in the command
line word processor nano. It looks like your usb audio value (options
snd-usb-audio index=-2) is set to "-2". You can try setting this to 0 by
using the cursor keys to highlight the -2, pressing the delete button
when the cursor is over the - and 2, and then type 0. After this hit
ctrl+O then enter and then ctrl+X to exit. I don't know if this'll help
you solve your problem, but it'll hopefully help you out, at least a
little bit with nano.
Tony Moretti
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