[mythtv-users] HD-3000, FC4, PVR-250/500

David Ellis david at ellisonline.ca
Sun Jan 8 19:37:43 UTC 2006


Yeah I've done this.

 

My audio device is ALSA: IEC958, and my iec958 mode is PCM. Works fine if I
enable the "AC3 Pass Thru TV Setting", only messed up thing is no mixer (use
receivers volume controls).

 

For this I use my standard onboard audio chipset "Via 8237". I do this with
two HD3000's, 1 on QAM 1 on ATSC OTA.

 

David

 

  _____  

From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Chris Lynch
Sent: Sunday, January 08, 2006 12:33 PM
To: Discussion about mythtv
Subject: Re: [mythtv-users] HD-3000, FC4, PVR-250/500

 

 

On 1/8/06, Chris Lynch <lynchseattle at gmail.com> wrote:

I *think* I'm a little closer, but still somewhat struggling after playing
with this a few hours.  Is there a way to tell Myth to use specific audio
PIDs?  I can't seem to find a way to do this and worked through a number of
channels as you described above, but am not sure what else I can give myth
outside of the PIDs themselves.

I do get sound when playing back from mplayer something I cat from dvr0.
The catch is that if I play back I really have to specify -ac hwac3 for
mplayer.  This got me thinking that maybe Myth is not pasing AC3 out to my
spdif port.  I *do* have the MythTV option to pass AC3 turned on and I'm
using the .asoundrc from Jarod's site with mixed digital for ALSA.

Is anyone else sending AC3 from a DVB stream over SPDIF?  If so, what does
your .asoundrc look like?


To confirm that I'm not crazy, I recorded a show in Myth and played it back
on my Windows box.  It has full sound, but on Myth, using ALSA:spdif, I get
no sound.  If I uncheck the box in Myth to do AC3 passthrough, I *also* get
sound, but of course no AC3.

I'm still investigating, but I'm curious if anyone with a HD-3000 is
outputing AC3 over spdif?

Thanks,

Chris

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