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Old 07-07-2010, 08:11 PM
Default Getting S/PDIF output working

On 07/07/2010 12:51 PM, Alan Nicoll wrote:
> PROBLEM: No sound coming out of my Denon Receiver that is hooked to my
> pc via optical cable connected to the S/PDIF port. If I set the
> system up to output to speakers connected to the green port I can get
> sound.
> Athlon 64x2 processor
> ASUS M4A78L-M motherboard
> [root@NN nck]# cat /proc/asound/cards
> 0 [SB ]: HDA-Intel - HDA ATI SB
> HDA ATI SB at 0xfe8f4000 irq 16
> 1 [HDMI ]: HDA-Intel - HDA ATI HDMI
> HDA ATI HDMI at 0xfeae8000 irq 26
> [root@NN nck]# uname -r
> [root@NN nck]# uname -a
> Linux NN.FRONT #1 SMP Thu May 6 18:09:49 UTC
> 2010 x86_64 x86_64 x86_64 GNU/Linux
> [root@NN nck]# uname -m
> x86_64
> Fedora 13_64, fully updated.
> Hovering the mouse over the speaker icon in the top bar shows "Output
> 100%; 0.0db, RS780 Azalia Controller Digital Stereo (HDMI) so I am
> assuming that is the default sound output.
> I went into alsamixer and muted everything except the SPDIF bars in
> both cards.
> I test the system by opening sound preferences, hardware tab,
> selecting the RS780 Azalia controller and running the Test Speakers
> app. I do not get any sound. I have my Denon set to Aux, 0db and Aux
> is set to Optical 1 and that port is connected to my pc. I can see
> light coming from the end of the cable when the pc is on.
> I have been working this problem since 1JUL10. I first installed
> MythDora 12 and learned a lot about alsa, drivers, mixers and linux
> sound then started over from scratch with Fedora 13. I quickly got to
> the same point.
> Nick
> "Open source costs time instead of money."
On my system, I have to enable S/PDIF in the BIOS
before I can use it. However, on my machine, it seems
to be used only for audio output.
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