[mythtv-users] Audio not working via coax/spdif

[Mir Islam]

Alen Edwards wrote:
> Mir Islam wrote:
>   
>> Hi just got a new sound card Diamond extreme with coax output. The sound 
>> is working fine outside of MythTV in regular desktop but not in MythTV.
>>
>> In MythTV I have audio setup as following:
>>
>> Audio Output Device: ALSA:spdif
>> Passthrough: ALSA:IEC958{AES0 0x02}
>> Max Audio Channels: 5.1 Upmix: Passive
>> Enable AC3/DTS to SPDIF passthrough checked
>>
>> But no sound comes out of my AV receiver. I can start mplayer and play 
>> DVD or recorded programs from hard disk fine and AV receiver correctly 
>> identifies number of channels etc. In MythFrontend log I see this error:
>>
>> 2008-06-29 14:33:54.596 AFD: Opened codec 0x138f550, id(MPEG2VIDEO) 
>> type(Video)
>> 2008-06-29 14:33:54.596 AFD: codec AC3 has 2 channels
>> 2008-06-29 14:33:54.597 AFD: Opened codec 0x13d3150, id(AC3) type(Audio)
>> 2008-06-29 14:33:54.599 Opening audio device 'spdif'. ch 6(2) sr 48000
>> 2008-06-29 14:33:54.599 Opening ALSA audio device 'iec958:{ AES0 0x02 }'.
>> 2008-06-29 14:33:54.698 AudioOutput Error: Channels count (6) not 
>> available: Invalid argument
>> 2008-06-29 14:33:54.698 AudioOutput Error: Unable to set ALSA parameters
>> 2008-06-29 14:33:54.698 NVP: Disabling Audio, reason is: Unable to set 
>> ALSA parameters
>>
>>
>> Some other info:
>>
>> In mplayer config I have ac=hwac3.
>>
>> mislam at neptune:~$ aplay -l
>> **** List of PLAYBACK Hardware Devices ****
>> card 0: CMI8768 [C-Media CMI8768], device 0: CMI8738-MC8 [C-Media PCI 
>> DAC/ADC]
>>   Subdevices: 1/1
>>   Subdevice #0: subdevice #0
>> card 0: CMI8768 [C-Media CMI8768], device 1: CMI8738-MC8 [C-Media PCI 
>> 2nd DAC]
>>   Subdevices: 1/1
>>   Subdevice #0: subdevice #0
>> card 0: CMI8768 [C-Media CMI8768], device 2: CMI8738-MC8 [C-Media PCI 
>> IEC958]
>>   Subdevices: 1/1
>>   Subdevice #0: subdevice #0
>>
>>
>> Thanks
>> Mir
>>     
>
> Have you tried "default" as the audio output device?  Keep your bypass 
> device as is and you should get spdif out.
>
> Allen
>   
Setting audio output to default did not work either. Any other idea?

Thanks
Mir


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