[mythtv-users] HDMI ac3 passthough audio

Steven Adeff adeffs.mythtv at gmail.com
Tue Feb 10 18:07:22 UTC 2009

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.

Before you ask, read the FAQ!
then search the Wiki, and this list,
Mailinglist etiquette -

More information about the mythtv-users mailing list