[mythtv-users] SPDIF passthrough
Jason Jesso
jjesso1607 at gmail.com
Tue Feb 5 16:14:12 UTC 2008
I am trying to output 5.1 audio through my sound card's digital output to my
a/v receiver for decoding. I cannot get this to work in Mythtv. I can play
the H.264/AC3 MKV file, but no passthrough to my receiver.
My current settings are:
Audio output device: ALSA:cards.pcm.iec958
Passthrough output device: ALSA:iec958:{ AES0 0x02 }
- Enable AC3 to SPDIF passthrough (CHECKED)
- Enable DTS to SPDIF passthrough (CHECKED)
What could be wrong with this?
I do have success with mplayer:
mplayer -afm hwac3 -ao alsa:noblock:device=hw=0.1 whatever.mkv
BTW, all channels are unmuted. (works with mplayer)
The following is more sound hardware info:
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 0: ALC883 Analog [ALC883 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 1: ALC883 Digital [ALC883 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
$ aplay -L
default:CARD=NVidia
HDA NVidia, ALC883 Analog
Default Audio Device
front:CARD=NVidia,DEV=0
HDA NVidia, ALC883 Analog
Front speakers
surround40:CARD=NVidia,DEV=0
HDA NVidia, ALC883 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=NVidia,DEV=0
HDA NVidia, ALC883 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=NVidia,DEV=0
HDA NVidia, ALC883 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=NVidia,DEV=0
HDA NVidia, ALC883 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=NVidia,DEV=0
HDA NVidia, ALC883 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
null
Discard all samples (playback) or generate zero samples (capture)
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