[mythtv-users] Static noise from AC3 passthrough

Eric Smith erictsmith at gmail.com
Wed May 31 23:43:45 UTC 2006

Using ALSA:digital-hw results in the same static as using ALSA:digital?

On 5/31/06, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> On 05/30/06 21:43, Eric Smith wrote:
> >One more dumb question.  What can i set the mixer device to in order
> >to have internal volume control in myth when the audio device is set
> >to iec958?
> >
> You can't have internal volume control in Myth when the audio device is
> set to iec958 unless you redefine the card-provided "iec958" virtual
> device (using a "!iec958" definition in your ALSA configuration file) to
> include the use of the softvol plugin /and/ you disable passthrough.
> However, since you have to put a definition in your ALSA configuration
> file, anyway, it makes more sense to use a different name instead of
> overriding the card-provided virtual device.  And, unfortunately,
> disabling passthrough puts you back where you started at the beginning
> of the thread...
> The "right" approach with digital output is to use the volume controls
> on the receiver that's decoding the signal.
> BTW, completely backtracking on what I said in my first post to this
> thread, you should be able to use "ALSA:digital-hw" with the exact same
> results as "ALSA:iec958".  (And I would be forever grateful if you would
> confirm this for me.)
> Mike
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