On Thu, 2 Sep 2010, Cyril Russo wrote:
Le 02/09/2010 15:52, Jaroslav Kysela a écrit :
On Thu, 2 Sep 2010, Cyril Russo wrote:
Hi,
I've an issue with my new Creative Audigy sound card.
I'm using a Debian Squeeze (with official 2.6.32-5-amd64 kernel) system.
I've done this step to ensure I'm using the latest version:
sudo module-assistant auto-install alsa (which installed the driver from
alsa-driver 1.0.23's package)
The sound card is correctly detected and it's working, but I've an
issue, in that each channel appears as a different device.
So in all the software using Alsa I have to select a device and it
outputs on a single stereo channel for this particular device.
For example, this command lists:
# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: CA0106 [CA0106], device 0: ca0106 [CA0106]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: CA0106 [CA0106], device 1: ca0106 [CA0106]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: CA0106 [CA0106], device 2: ca0106 [CA0106]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: CA0106 [CA0106], device 3: ca0106 [CA0106]
Subdevices: 1/1
Subdevice #0: subdevice #0
Here the /proc/asound dump:
# find /proc/asound/
/proc/asound/
/proc/asound/CA0106
/proc/asound/card0
/proc/asound/card0/id
/proc/asound/card0/midi0
/proc/asound/card0/iec958
/proc/asound/card0/ca0106_reg32
/proc/asound/card0/ca0106_reg16
/proc/asound/card0/ca0106_reg8
/proc/asound/card0/ca0106_regs1
/proc/asound/card0/ca0106_i2c
/proc/asound/card0/ca0106_regs2
/proc/asound/card0/pcm3c
/proc/asound/card0/pcm3c/sub0
/proc/asound/card0/pcm3c/sub0/prealloc_max
/proc/asound/card0/pcm3c/sub0/prealloc
/proc/asound/card0/pcm3c/sub0/status
/proc/asound/card0/pcm3c/sub0/sw_params
/proc/asound/card0/pcm3c/sub0/hw_params
/proc/asound/card0/pcm3c/sub0/info
/proc/asound/card0/pcm3c/info
/proc/asound/card0/pcm3p
/proc/asound/card0/pcm3p/sub0
/proc/asound/card0/pcm3p/sub0/prealloc_max
/proc/asound/card0/pcm3p/sub0/prealloc
/proc/asound/card0/pcm3p/sub0/status
/proc/asound/card0/pcm3p/sub0/sw_params
/proc/asound/card0/pcm3p/sub0/hw_params
/proc/asound/card0/pcm3p/sub0/info
/proc/asound/card0/pcm3p/info
/proc/asound/card0/pcm2c
/proc/asound/card0/pcm2c/sub0
/proc/asound/card0/pcm2c/sub0/prealloc_max
/proc/asound/card0/pcm2c/sub0/prealloc
/proc/asound/card0/pcm2c/sub0/status
/proc/asound/card0/pcm2c/sub0/sw_params
/proc/asound/card0/pcm2c/sub0/hw_params
/proc/asound/card0/pcm2c/sub0/info
/proc/asound/card0/pcm2c/info
/proc/asound/card0/pcm2p
/proc/asound/card0/pcm2p/sub0
/proc/asound/card0/pcm2p/sub0/prealloc_max
/proc/asound/card0/pcm2p/sub0/prealloc
/proc/asound/card0/pcm2p/sub0/status
/proc/asound/card0/pcm2p/sub0/sw_params
/proc/asound/card0/pcm2p/sub0/hw_params
/proc/asound/card0/pcm2p/sub0/info
/proc/asound/card0/pcm2p/info
/proc/asound/card0/pcm1c
/proc/asound/card0/pcm1c/sub0
/proc/asound/card0/pcm1c/sub0/prealloc_max
/proc/asound/card0/pcm1c/sub0/prealloc
/proc/asound/card0/pcm1c/sub0/status
/proc/asound/card0/pcm1c/sub0/sw_params
/proc/asound/card0/pcm1c/sub0/hw_params
/proc/asound/card0/pcm1c/sub0/info
/proc/asound/card0/pcm1c/info
/proc/asound/card0/pcm1p
/proc/asound/card0/pcm1p/sub0
/proc/asound/card0/pcm1p/sub0/prealloc_max
/proc/asound/card0/pcm1p/sub0/prealloc
/proc/asound/card0/pcm1p/sub0/status
/proc/asound/card0/pcm1p/sub0/sw_params
/proc/asound/card0/pcm1p/sub0/hw_params
/proc/asound/card0/pcm1p/sub0/info
/proc/asound/card0/pcm1p/info
/proc/asound/card0/pcm0c
/proc/asound/card0/pcm0c/sub0
/proc/asound/card0/pcm0c/sub0/prealloc_max
/proc/asound/card0/pcm0c/sub0/prealloc
/proc/asound/card0/pcm0c/sub0/status
/proc/asound/card0/pcm0c/sub0/sw_params
/proc/asound/card0/pcm0c/sub0/hw_params
/proc/asound/card0/pcm0c/sub0/info
/proc/asound/card0/pcm0c/info
/proc/asound/card0/pcm0p
/proc/asound/card0/pcm0p/sub0
/proc/asound/card0/pcm0p/sub0/prealloc_max
/proc/asound/card0/pcm0p/sub0/prealloc
/proc/asound/card0/pcm0p/sub0/status
/proc/asound/card0/pcm0p/sub0/sw_params
/proc/asound/card0/pcm0p/sub0/hw_params
/proc/asound/card0/pcm0p/sub0/info
/proc/asound/card0/pcm0p/info
/proc/asound/pcm
/proc/asound/timers
/proc/asound/modules
/proc/asound/cards
/proc/asound/devices
/proc/asound/version
/proc/asound/seq
/proc/asound/seq/timer
/proc/asound/seq/clients
/proc/asound/seq/queues
/proc/asound/seq/drivers
/proc/asound/oss
/proc/asound/oss/sndstat
/proc/asound/oss/devices
# cat /proc/asound/cards
0 [CA0106 ]: CA0106 - CA0106
Audigy SE [SB0570] at 0xcf00 irq 18
# cat /proc/asound/devices
0: [ 0] : control
1: : sequencer
8: [ 0- 0]: raw midi
16: [ 0- 0]: digital audio playback
17: [ 0- 1]: digital audio playback
18: [ 0- 2]: digital audio playback
19: [ 0- 3]: digital audio playback
24: [ 0- 0]: digital audio capture
25: [ 0- 1]: digital audio capture
26: [ 0- 2]: digital audio capture
27: [ 0- 3]: digital audio capture
33: : timer
I've an empty .asoundrc (Using a more complex .asoundrc I'm able to
duplicate a channel to all other channels, but it's only duplication,
it's the same sound on all channels)
As such the audio softwares usually list this while enumerating the
devices:
ALSA device: hw:CA0106,0 outs=2-2 ins=2-2 rates=3
ALSA device: hw:CA0106,1 outs=2-2 ins=2-2 rates=3
ALSA device: hw:CA0106,2 outs=2-2 ins=2-2 rates=3
ALSA device: hw:CA0106,3 outs=2-2 ins=2-2 rates=3
I want them to list a single device with 8 outputs, and not 4 devices
with 2 outputs.
I have other systems with different sound cards and it's the first time
I'm seeing this.
Use surround71 device (like 'aplay -D plug:surround71'). It combines the
stereo devices to a 8-channel device.
Hi,
Yes, that's what I've did (used speaker-test and a redirection in
.asoundrc, but it's the same idea). However some software don't allow to set
up the audio device as a text, but instead enumerate them using alsa's
functions.
In that case, I can't set them to plug:surround71, and I can only select one
of the devices (stereo pair).
It certainly the bug in the applications. I would push authors to fix
this.
How come alsa list all channels as separate devices, at first ? Is it
possible to change this ?
aplay -L shows the logical devices available for applications with
the defined behaviour.
The -l variant shows hardware (or native driver) devices only.
Jaroslav
-----
Jaroslav Kysela <perex@xxxxxxxx>
Linux Kernel Sound Maintainer
ALSA Project, Red Hat, Inc.
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