[mythtv-users] AC3 Passthru doesn't work on Nforce4 ALC850

[Branden Stanley]

Sorry I'm not sure what to make of the 'AO: KillingAudioOutputDSP' I
get the same thing but
my amp is getting the ac3 passed though.

I would be happy to send my sound configuration files over for you to
try. If that helps.

On 9/16/06, ubulid00 <ubulid00 at fastmail.fm> wrote:
>
>
>
> Branden Stanley wrote:
> >
> > I struggled with this as well with my K8N neo4 platinum. I believe the
> > combo that "worked" was using the guide:
> > http://www.mythtv.org/wiki/index.php/Enabling_nForce4_optical_SPDIF_output
> >
> > Then:
> > yum install alsamixergui
> > run alsamixergui
> > set all 'IEC958' to zero
> > Then the thing that worked was untick the red dots above the 'IEC958'
> > that only show up in alsamixergui
> > Set Myth audio to:
> > ALSA:spdif
> > default for the mixer
> > Enable ac3 passthrough
> >
> > Done.
> >
> > **the mixer was crashing on me so I needed to kill and reload the app
> > 4 times to get everything sorted out...
> >
>
> Thanks Branden,
> I might be getting closer, but still no sound. I've followed all your
> suggestions, and it cleared up an error message, but this is what I now see
> when watching a AC3 HD recording.  Note the 'AO: KillingAudioOutputDSP'
> entry.  Other than that it looks mostly ok. This is with 'mythfrontend -v
> audio'.  What do you  (or any one else) think?
>
> 2006-09-16 14:27:31.580 TV: Attempting to change from None to
> WatchingPreRecorded
> 0: start_time: 5235.299 duration: 485.667
> 1: start_time: 5235.253 duration: 485.678
> stream: start_time: 58169.473 duration: 5396.818 bitrate=15651 kb/s
> 2006-09-16 14:27:31.645 AFD: Opened codec 0xb587c0, id(MPEG2VIDEO_XVMC)
> type(Video)
> 2006-09-16 14:27:31.646 AFD: Opened codec 0x8b9c70, id(AC3) type(Audio)
> 2006-09-16 14:27:31.646 AFD: Audio Track #1 is A/V stream #1 and has 2
> channels in the English language(6647399).
> 2006-09-16 14:27:31.646 AFD: Selected track 1: English AC3 2ch (A/V Stream
> #1)
> 2006-09-16 14:27:31.646 AFD: Initializing audio parms from audio track #1
> 2006-09-16 14:27:31.646 AFD: Audio format changed
>                         from id(NONE)    -1Hz -1ch   0bps    ; id(NONE)
> -1Hz -1ch   0bps
>                         to   id( AC3) 48000Hz  2ch  16bps pt ; id( AC3)
> 48000Hz  2ch  16bps pt
> 2006-09-16 14:27:31.647 AO: Killing AudioOutputDSP
> 2006-09-16 14:27:31.648 Opening ALSA audio device 'spdif'.
> 2006-09-16 14:27:31.648 in SetParameters(format=2, channels=2, rate=48000,
> buffer_time=500000, period_time=125000)
> 2006-09-16 14:27:31.649 get_buffer_size returned 16384
> 2006-09-16 14:27:31.649 set_period_time_near returned 85333
> 2006-09-16 14:27:31.649 get_period_size returned 4096
> 2006-09-16 14:27:31.650 Opening mixer default
> 2006-09-16 14:27:31.651 Setting Master volume to 70
> 2006-09-16 14:27:31.651 Volume range is 0 to 31, mult=3.22581
> 2006-09-16 14:27:31.651 channel 0 vol set to 22
> 2006-09-16 14:27:31.652 Setting Master volume to 70
> 2006-09-16 14:27:31.652 Volume range is 0 to 31, mult=3.22581
> 2006-09-16 14:27:31.652 channel 1 vol set to 22
> 2006-09-16 14:27:31.652 Setting PCM volume to 100
> 2006-09-16 14:27:31.652 Volume range is 0 to 31, mult=3.22581
> 2006-09-16 14:27:31.652 channel 0 vol set to 31
> 2006-09-16 14:27:31.652 Setting PCM volume to 100
> 2006-09-16 14:27:31.652 Volume range is 0 to 31, mult=3.22581
> 2006-09-16 14:27:31.652 channel 1 vol set to 31
> 2006-09-16 14:27:31.652 Volume range is 0 to 31, mult=3.22581
> 2006-09-16 14:27:31.652 AO: Audio fragment size: 6144
> 2006-09-16 14:27:31.653 AO: Audio Stretch Factor: 1
> 2006-09-16 14:27:31.653 AO: Ending reconfigure
> 2006-09-16 14:27:31.664 AO: kickoffOutputAudioLoop: pid = 32356
> 2006-09-16 14:27:31.665 AO: OutputAudioLoop: Play Event
> 2006-09-16 14:27:31.665 AO: Broadcasting free space avail
> 2006-09-16 14:27:31.674 AO: Broadcasting free space avail
> 2006-09-16 14:27:31.684 AO: Broadcasting free space avail
> 2006-09-16 14:27:31.688 AO: Broadcasting free space avail
>
>
> --
> View this message in context: http://www.nabble.com/AC3-Passthru-doesn%27t-work-on-Nforce4-ALC850-tf2283328.html#a6343743
> Sent from the mythtv-users forum at Nabble.com.
>
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