[mythtv-users] Partly OT: Output analog recordings to SPDIF

Ashley Clark aclark at ghoti.org
Sun Apr 16 04:55:03 UTC 2006


I set up my SPDIF connection using the information at this page:
http://mythtv.org/wiki/index.php/Configuring_Digital_Sound

After using their revised asoundrc I'm using ALSA:digital as my  
output device and I get clear PCM 2.0 sound and 5.1 pass-through.

On Apr 15, 2006, at 11:22 PM, N Dugas wrote:

> I've been playing around with SPDIF and have been able to output HD
> sound to SPDIF.  When playing back analog video, the sound stutters  
> and
> sounds like chipmunks.  Googling has not yielded a working solution.
>
> My .asoundrc looks like this:
>
> pcm.!default {
>     type plug
>     slave.pcm dmix-nforce
> }
>
> #my spdif is device 2
> pcm.nforce-hw {
>     type hw
>     card 0
>     device 2
> }
>
> pcm.dmix-nforce {
>     type dmix
>     ipc_key 1234
>     ipc_perm 0666
>     slave {
>        #point the pcm to spdif
>        pcm "nforce-hw"
>        channels 2
>        period_time 0
>        buffer_time 0
>        period_size 2048
>        buffer_size 32768
>     }
> }
>
> When I select ALSA:dmix-nforce as the device, mythfrontend complains
> that it cannot open the device.  For now, I have to chose either
> ALSA:plug:spdif or /dev/dsp.  I'd like to be able to keep it on one
> setting.  Any ideas?
>
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Ashley Clark


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