[mythtv-users] how to tell if 5.1 audio channels mapped correctly?

[Jan Schneider]

Zitat von Jan Schneider <jan at horde.org>:

> Zitat von Jean-Yves Avenard <jyavenard at gmail.com>:
>
>> Hi
>>
>> On 8 November 2010 04:37, Jan Schneider <jan at horde.org> wrote:
>>>
>>> This thread got me curious, so I've run your test videos on my FE.  
>>> The MB is
>>> connected to the amplifier through S/PDIF, and the amp's internal speaker
>>> test assures that all speakers are working and connected correctly.
>>> If I run the 5.1 test videos though, I don't get any sound from  
>>> the surround
>>> (rear) speakers. MythTV is configured to use the digital alsa port, DD and
>>> DTS passthrough, upsampling of stereo.
>>> I don't have a /etc/asound.conf file.
>>> Any hints?
>>
>> What speaker configuration do you have?
>
> 5.1 and that's how I've set up my 0.23-fixes FE.
>
>> If myth <= 0.22 ; for passthrough, you need to set it to "Stereo".
>> If myth > 0.22 ; you need to set it to 5.1
>>
>> When playing upsampled stereo; do you get audio on the rear channel?
>
> Yes, but maybe that's my receiver, because I also get (low) output  
> there on AC3 content. I even get the front channels (low) on the  
> rear speakers with the test videos. But *not* the rear channels. I  
> only get some low rear channel output on the LFE.
>
>> Side note: with myth <= 0.23 : there is no downmixing occurring for
>> anything other than AC3 and DTS. ffmpeg doesn't downmix any other
>> codecs. This is something corrected with 0.24.
>
> I don't downmix, at least not intentionally, since 0.23 I use sound  
> output exclusively via the 5.1 receiver.

Any ideas what might be the issue here?

Jan.

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