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Old 12-05-09, 10:48 AM   #1
shanondink
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Join Date: Dec 2009
Posts: 2
Default Centos Optical SPDIF

Hi,

I'm having a heck of a time with this.

I have an Asus M3N78 PRO and I'm trying to output sound to optical SPDIF. This motherboard only has a the RCA out so I added on the optical card and it lights the fiber.

If I issue "speaker-test -c2 -twav -Dplughw:0,3" I get output through my TV.

But "speaker-test -c2 -twav -Dplughw:0,1" does not error, but no sound.

I am changing inputs on my receiver and have the defaults in the bios

Where should I go to troubleshoot this more? I've been googling for 2 days with no luck.


#lspci -v
Code:
00:07.0 Audio device: nVidia Corporation MCP72XE/MCP72P/MCP78U/MCP78S High Definition Audio (rev a1)
        Subsystem: ASUSTeK Computer Inc. M3N72-D
        Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 193
        Memory at fe020000 (32-bit, non-prefetchable) [size=16K]
        Capabilities: [44] Power Management version 2
        Capabilities: [50] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-
        Capabilities: [6c] HyperTransport: MSI Mapping
#aplay -L
Code:
front:CARD=NVidia,DEV=0
    HDA NVidia, ALC1200 Analog
    Front speakers
surround40:CARD=NVidia,DEV=0
    HDA NVidia, ALC1200 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=NVidia,DEV=0
    HDA NVidia, ALC1200 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=NVidia,DEV=0
    HDA NVidia, ALC1200 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=NVidia,DEV=0
    HDA NVidia, ALC1200 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=NVidia,DEV=0
    HDA NVidia, ALC1200 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=NVidia,DEV=0
    HDA NVidia, ALC1200 Digital
    IEC958 (S/PDIF) Digital Audio Output
null
    Discard all samples (playback) or generate zero samples (capture)
# aplay -l
Code:
**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 0: ALC1200 Analog [ALC1200 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 1: ALC1200 Digital [ALC1200 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 3: NVIDIA HDMI [NVIDIA HDMI]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Thanks a bunch,
Shanon
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Old 12-06-09, 09:11 PM   #2
shanondink
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Join Date: Dec 2009
Posts: 2
Default Re: Centos Optical SPDIF

I plugged in using the copper SPDIF (which is on-board), and it doesn't work either.

Here is some more info:

# uname -a
Code:
Linux linux-pc 2.6.18-164.6.1.el5 #1 SMP Tue Nov 3 16:12:36 EST 2009 x86_64 x86_64 x86_64 GNU/Linux
# rpm -qa alsa\*
Code:
alsa-driver-1.0.20-80.el5
alsa-lib-1.0.17-1.el5
alsa-utils-1.0.17-1.el5
alsa-kmdl-2.6.18-164.6.1.el5-1.0.20-80.el5
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Old 12-07-09, 12:03 AM   #3
TheBlackCat
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Join Date: Aug 2008
Posts: 84
Default Re: Centos Optical SPDIF

Considering this is a nvidia graphics card forum, this is probably not the place. Just go to the #alsa irc channel on freenode.net. The people there are really good. But keep in mind that what they can do may be limited since most of the software in centos is ancient. Alsa looks relatively up-to-date (which is surprising for centos), but that kernel is three years old.
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