snd-via82xx setting

snd-via82xx setting

[Benjamin Hovey]

FYI, the below system required the following non-default settings for ALSA
to play any SPDIF output correctly.  Prior to finding this setting, output
from different sources, WAV, MP3, CD, etc, were played at a slightly faster
speed than they should have.

snd_via82xx: dxs_support=3

When installed, the default setting was dxs_support=5.

Hope this helps.  I am new to Linux and it took me quite a while to find out
how to set this setting (I put it in  /etc/modprobe.d/alsa-base.conf)
Cheers



upload=true&script=true&cardinfo=
!!################################
!!ALSA Information Script v 0.4.60
!!################################

!!Script ran on: Mon Jan 31 02:37:03 UTC 2011


!!Linux Distribution
!!------------------

Ubuntu 10.04.1 LTS \n \l DISTRIB_ID=Ubuntu DISTRIB_DESCRIPTION="Ubuntu
10.04.1 LTS"


!!DMI Information
!!---------------

Manufacturer:      VIA Technologies, Inc.
Product Name:      KT600-8237
Product Version:


!!Kernel Information
!!------------------

Kernel release:    2.6.32-28-generic
Operating System:  GNU/Linux
Architecture:      i686
Processor:         unknown
SMP Enabled:       Yes


!!ALSA Version
!!------------

Driver version:     1.0.21
Library version:    1.0.23
Utilities version:  1.0.22


!!Loaded ALSA modules
!!-------------------

snd_via82xx
snd_emu10k1


!!Sound Servers on this system
!!----------------------------

Pulseaudio:
      Installed - Yes (/usr/bin/pulseaudio)
      Running - Yes

ESound Daemon:
      Installed - Yes (/usr/bin/esd)
      Running - No


!!Soundcards recognised by ALSA
!!-----------------------------

 0 [V8237          ]: VIA8237 - VIA 8237
                      VIA 8237 with VT1616i at 0xe400, irq 22
 1 [Live           ]: EMU10K1 - SB Live! Platinum [CT4760P]
                      SB Live! Platinum [CT4760P] (rev.8, serial:0x80401102)
at 0xb000, irq 17


!!PCI Soundcards installed in the system
!!--------------------------------------

00:09.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 08)
00:0a.0 Multimedia controller: Sigma Designs, Inc. REALmagic Hollywood Plus
DVD Decoder (rev 02)
00:11.5 Multimedia audio controller: VIA Technologies, Inc.
VT8233/A/8235/8237 AC97 Audio Controller (rev 60)


!!Advanced information - PCI Vendor/Device/Subsystem ID's
!!--------------------------------------------------------

00:09.0 0401: 1102:0002 (rev 08)
    Subsystem: 1102:8040
--
00:11.5 0401: 1106:3059 (rev 60)
    Subsystem: 147b:1408


!!Modprobe options (Sound related)
!!--------------------------------

snd_via82xx: index=0
snd_emu10k1: index=1
snd_via82xx: dxs_support=4
snd-atiixp-modem: index=-2
snd-intel8x0m: index=-2
snd-via82xx-modem: index=-2
snd-usb-audio: index=-2
snd-usb-us122l: index=-2
snd-usb-usx2y: index=-2
snd-usb-caiaq: index=-2
snd-cmipci: mpu_port=0x330 fm_port=0x388
snd-pcsp: index=-2
snd_via82xx: index=0
snd_emu10k1: index=1
snd_via82xx: dxs_support=3
snd_via82xx: ac97_clock=48000

Re: Ubuntu 10.04, VT8233/A/8235/8237: snd-via82xx `dxs_support` needs to be `3` instead of `5`

[Paul Menzel]

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Dear Benjamin,


Am Sonntag, den 30.01.2011, 21:48 -0500 schrieb Benjamin Hovey:
> FYI, the below system required the following non-default settings for ALSA
> to play any SPDIF output correctly.  Prior to finding this setting, output
> from different sources, WAV, MP3, CD, etc, were played at a slightly faster
> speed than they should have.
> 
> snd_via82xx: dxs_support=3
> 
> When installed, the default setting was dxs_support=5.
>
> 
> Hope this helps.  I am new to Linux and it took me quite a while to find out
> how to set this setting (I put it in  /etc/modprobe.d/alsa-base.conf)

thank you very much for reporting that issues especially if you are new
to GNU/Linux!

I have some questions and remarks.

Thanks for attaching/pasting the output of `alsa-info.sh`. This means
you informed yourself beforehand what is needed for debugging. Next time
please turn of line wrapping when pasting stuff though. Although I do
not know how to do that with Google Mail.

[…]

> !!Soundcards recognised by ALSA
> !!-----------------------------
> 
>  0 [V8237          ]: VIA8237 - VIA 8237
>                       VIA 8237 with VT1616i at 0xe400, irq 22
>  1 [Live           ]: EMU10K1 - SB Live! Platinum [CT4760P]
>                       SB Live! Platinum [CT4760P] (rev.8, serial:0x80401102) at 0xb000, irq 17

Just for me, is it true you have an extra SB Live card or is that also
from the motherboard? Sorry for my ignorance.

[…]

> !!Modprobe options (Sound related)
> !!--------------------------------
> 
> snd_via82xx: index=0
> snd_emu10k1: index=1
> snd_via82xx: dxs_support=4

[…]

> snd_via82xx: index=0
> snd_emu10k1: index=1
> snd_via82xx: dxs_support=3
> snd_via82xx: ac97_clock=48000

These seem to be the options from `alsa-base.conf`. I do not know if it
is provided from upstream ALSA or by the distribution, in this case
Ubuntu.

Did you set the/changed it to `4` there or was it there by default? alsa
it looks like some lines are doubles. Probably from debugging and just
cosmetics though.


Thanks,

Paul

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