[mythtv-users] HDMI ac3 passthough audio

[Joel Means]

On Tue, Feb 10, 2009 at 11:11 AM, Allen Edwards
<allen.p.edwards at gmail.com> wrote:
> On Tue, Feb 10, 2009 at 10:07 AM, Steven Adeff <adeffs.mythtv at gmail.com> wrote:
>> On Tue, Feb 10, 2009 at 12:50 PM, James Armstrong
>> <james at thearmstrongs.org> wrote:
>>>> I think that the answers given don't address what the issue is here.
>>>> I am not at home, so I can't try the given line out, but I will tell
>>>> you my problem with audio over HDMI.  I can get regular audio to work
>>>> using hw:0,3 or any number of variations on that.  I cannot, however,
>>>> get S/PDIF passthrough to work over HDMI, only over my standard
>>>> optical out.  I always just get clicking noises.  It is passing the
>>>> digital as an analog signal.  I think the key in the line JP used is
>>>> "alsa:device=iec958=1".  In alsamixer, I have "iec958", "iec958
>>>> default", and "iec958 1" all listed but I have never found how to tell
>>>> anything to use "iec958 1" as the device.  I will try it out tonight
>>>> and see if it will give my proper passthrough or not, but I think that
>>>> this may be the problem.  So, the question then would be, is there any
>>>> way to address "iec958 1" as the passthrough device, a la
>>>> "ALSA:iec958(AES0 0x02)"?
>>>> J
>>>
>>> I have had the exact same problem. Can get hdmi audio, but if I enable
>>> passthrough get clicking / pops
>>>
>>> - James
>>
>> again, I would use the plughw number for the device you want to use
>> instead of playing with ALSA's naming scheme.
>>
>>
>> --
>> Steve
>> http://www.mythtv.org/wiki/index.php/User:Steveadeff
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>
>
>
> Does the post I did earlier with the new simplified digital output
> apply to these problems?
>
> Allen
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No, I have tried all of that stuff before.  But, like I said, I
haven't yet tried with "alsa:device=iec958=1" either, so it may be
that I just can't pass S/PDIF over HDMI on my motherboard.  I will
check it out tonight and report back here.

And Steven, I have tried plughw and it gives the same result.

Joel