[mythtv-users] A tad OT: ALSA and SPDIF for via82xx - alt: choice of SPDIF cards

Brad Fuller bradallenfuller at yahoo.com
Tue Oct 26 15:12:15 UTC 2004

David George wrote:

> On 10/26/2004 10:23 AM, Brad Fuller wrote:
>> I didn't get an answer at the alsa user's email list nor at 
>> linux-audio-user, so I thought I'd post it hear. It's a bit OT since 
>> it is not a mythtv problem, but does apply.
>> --------------
>> I have been trying to get a via82xx on a DFI mobo to output SPDIF. 
>> (The reason: the analog audio on the right side is noisy.)
>> Anyway, I have had no luck. I brought the SPDIF pins out but I see no 
>> clock when checking with other hardware.

> Does aplay -L list iec958 or spdif?  If not, it isn't being detected 
> by the alsa drivers and enabled.

Yeah, this is the problem. Sorry, I didn't say that I tried aplay. What 
happens is that I don't even get a clock at the SPDIF output pins. The 
BIOS has one setting and that is to turn on AUTO for AC97.
Neither IEC958 nor SPDIF are displayed on any mixer. I found a link 
(above) that mentions that SPDIF doesn't show up on the GNOME ALSA 
mixer, but should on the alsamixer or amixer -- but it doesn't show up 
on any of my mixers.

The link above (or another link that I can't recall) said that SPDIF is 
not controlled by the mixer, it's either on or off. But, I can't find 
out how... So, I think it's a lower level issue with the mobo 
combination and the via82xx -- maybe it's just a via82xx problem.  If I 
had a clock on the output pins, I would be happier.


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